0001745114-26-000009 | 20-F | XBRL Viewer

Income Taxes - Deferred Taxes (Details) - CHF (SFr) SFr in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Taxes And Deferred Taxes [Abstract]
Net operating losses	SFr 57,854	SFr 50,643	SFr 56,285
Tax loss carryforwards	SFr 57,854	SFr 195,126
Tax loss carryforwards, expiration period	7 years

Insider Trading Policies and Procedures	12 Months Ended
Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Label

Element

Value

Vesting Requirements For Share-Based Payment Arrangement, Blocking Period

moln_VestingRequirementsForShareBasedPaymentArrangementBlockingPeriod

3 years

Vesting Requirements For Share-Based Payment Arrangement, Cliff Vesting Period

moln_VestingRequirementsForShareBasedPaymentArrangementCliffVestingPeriod

3 years

Adjustments For Social Security And Tax Paid On Employee Shares Vested

moln_AdjustmentsForSocialSecurityAndTaxPaidOnEmployeeSharesVested

SFr 325,000

Adjustments For Social Security And Tax Paid On Employee Shares Vested

moln_AdjustmentsForSocialSecurityAndTaxPaidOnEmployeeSharesVested

Adjustments For Social Security And Tax Paid On Employee Shares Vested

moln_AdjustmentsForSocialSecurityAndTaxPaidOnEmployeeSharesVested

Adjustments For Increase (Decrease) In Accrued Expenses

moln_AdjustmentsForIncreaseDecreaseInAccruedExpenses

343,000

Adjustments For Increase (Decrease) In Accrued Expenses

moln_AdjustmentsForIncreaseDecreaseInAccruedExpenses

161,000

Adjustments For Increase (Decrease) In Accrued Expenses

moln_AdjustmentsForIncreaseDecreaseInAccruedExpenses

45,000

Adjustment For Exchange Gains (Losses) On Working Capital Positions

moln_AdjustmentForExchangeGainsLossesOnWorkingCapitalPositions

18,000

Adjustment For Exchange Gains (Losses) On Working Capital Positions

moln_AdjustmentForExchangeGainsLossesOnWorkingCapitalPositions

39,000

Adjustment For Exchange Gains (Losses) On Working Capital Positions

moln_AdjustmentForExchangeGainsLossesOnWorkingCapitalPositions

21,000

Proceeds From Investments In Short-Term Time Deposits, Classified As Investing Activities

moln_ProceedsFromInvestmentsInShortTermTimeDepositsClassifiedAsInvestingActivities

137,814,000

Proceeds From Investments In Short-Term Time Deposits, Classified As Investing Activities

moln_ProceedsFromInvestmentsInShortTermTimeDepositsClassifiedAsInvestingActivities

277,015,000

Proceeds From Investments In Short-Term Time Deposits, Classified As Investing Activities

moln_ProceedsFromInvestmentsInShortTermTimeDepositsClassifiedAsInvestingActivities

319,443,000

Purchase Of Investments In Short-Term Time Deposits, Classified As Investing Activities

moln_PurchaseOfInvestmentsInShortTermTimeDepositsClassifiedAsInvestingActivities

66,278,000

Purchase Of Investments In Short-Term Time Deposits, Classified As Investing Activities

moln_PurchaseOfInvestmentsInShortTermTimeDepositsClassifiedAsInvestingActivities

240,045,000

Purchase Of Investments In Short-Term Time Deposits, Classified As Investing Activities

moln_PurchaseOfInvestmentsInShortTermTimeDepositsClassifiedAsInvestingActivities

277,825,000

Proceeds From Vesting Of Equity Instruments

moln_ProceedsFromVestingOfEquityInstruments

62,000

Proceeds From Vesting Of Equity Instruments

moln_ProceedsFromVestingOfEquityInstruments

Proceeds From Vesting Of Equity Instruments

moln_ProceedsFromVestingOfEquityInstruments

Increase (Decrease) Through Vesting Of Equity Instruments, Equity

moln_IncreaseDecreaseThroughVestingOfEquityInstrumentsEquity

(115,000)

Increase (Decrease) Through Vesting Of Equity Instruments, Equity

moln_IncreaseDecreaseThroughVestingOfEquityInstrumentsEquity

177,000

Increase (Decrease) Through Vesting Of Equity Instruments, Equity

moln_IncreaseDecreaseThroughVestingOfEquityInstrumentsEquity

62,000

Research And Development Expense Reimbursement

moln_ResearchAndDevelopmentExpenseReimbursement

SFr 2,300,000

Lease, Extension Term Of Contract

moln_LeaseExtensionTermOfContract

2 years

Disclosure Of Prepaid Expenses And Accrued Income [Text Block]

moln_DisclosureOfPrepaidExpensesAndAccruedIncomeTextBlock

Other current assets


in CHF thousands	2025	2024
Prepayments	1,914	2,249
Accrued income	71	276
Balance at December 31	1,985	2,525

Accrued income relates to interest income accrued on the Group's balances of cash and cash equivalents and short-term time deposits.

Disclosure Of Detailed Information About Prepaid Expenses And Accrued Income [Table Text Block]

moln_DisclosureOfDetailedInformationAboutPrepaidExpensesAndAccruedIncomeTableTextBlock


in CHF thousands	2025	2024
Prepayments	1,914	2,249
Accrued income	71	276
Balance at December 31	1,985	2,525

Disclosure Of Detailed Information About Trade And Other Receivables [Table Text Block]

moln_DisclosureOfDetailedInformationAboutTradeAndOtherReceivablesTableTextBlock


in CHF thousands	2025	2024
Trade receivables	253	286
Value added tax	895	470
Withholding tax	605	1,484
Other receivables	81	77
Balance at December 31	1,834	2,317

Trade receivables are denominated in the following currencies:


in CHF thousands	2025	2024

EUR	253	286

Balance at December 31	253	286

Disclosure Of Cash, Cash Equivalents And Short-Term Time Deposits [Text Block]

moln_DisclosureOfCashCashEquivalentsAndShortTermTimeDepositsTextBlock

Cash and cash equivalents and short-term time deposits


in CHF thousands	2025	2024
Cash at bank in CHF	69,624	54,127
Cash at bank in EUR	292	2,812
Cash at bank in USD	12,660	6,695
Cash at bank in GBP	77	240
Total cash at bank at December 31	82,653	63,874

Short-term time deposits in CHF	—	47,500

Short-term time deposits in USD	10,405	38,065
Total short-term deposits at December 31	10,405	85,565

All short-term time deposits at December 31, 2025 and 2024 were held with Swiss banks. As of December 31, 2025, the deposits denominated in USD contained two positions with two banks. As of December 31, 2024, there were five deposits denominated in CHF with three banks, where the short-term time deposits denominated in USD contained five positions with three banks. Please refer to note 25.

Disclosure Of Reconciliation Of Cash, Cash Equivalents And Short-Term Time Deposits [Table Text Block]

moln_DisclosureOfReconciliationOfCashCashEquivalentsAndShortTermTimeDepositsTableTextBlock


in CHF thousands	2025	2024
Cash at bank in CHF	69,624	54,127
Cash at bank in EUR	292	2,812
Cash at bank in USD	12,660	6,695
Cash at bank in GBP	77	240
Total cash at bank at December 31	82,653	63,874

Short-term time deposits in CHF	—	47,500

Short-term time deposits in USD	10,405	38,065
Total short-term deposits at December 31	10,405	85,565

Number Of Votes Per Share

moln_NumberOfVotesPerShare

Number Of Shares Issued In Share Based Payment Arrangements, Equity

moln_NumberOfSharesIssuedInShareBasedPaymentArrangementsEquity

309,591

Number Of Shares Issued In Share Based Payment Arrangements, Equity

moln_NumberOfSharesIssuedInShareBasedPaymentArrangementsEquity

365,810

Number Of Shares Issued In Share Based Payment Arrangements, Equity

moln_NumberOfSharesIssuedInShareBasedPaymentArrangementsEquity

11,546

Number Of Shares Issued In Capital Raise, Equity

moln_NumberOfSharesIssuedInCapitalRaiseEquity

3,642,988

Authorized Share Capital, Employee Participation

moln_AuthorizedShareCapitalEmployeeParticipation

SFr 362,264

Authorized Share Capital, Employee Participation

moln_AuthorizedShareCapitalEmployeeParticipation

SFr 363,419

Number Of Shares Authorized, Employee Participation

moln_NumberOfSharesAuthorizedEmployeeParticipation

3,622,644

Increase (Decrease) In Authorized Share Capital, Employee Participation

moln_IncreaseDecreaseInAuthorizedShareCapitalEmployeeParticipation

SFr (1,155)

Authorized Share Capital, Financing Transactions

moln_AuthorizedShareCapitalFinancingTransactions

SFr 226,087

Number Of Shares Authorized, Financing Transactions

moln_NumberOfSharesAuthorizedFinancingTransactions

2,260,870

Treasury Shares, Nominal Value

moln_TreasurySharesNominalValue

SFr 350,000

Treasury Shares, Transaction Costs Incurred

moln_TreasurySharesTransactionCostsIncurred

631,336

Value Of Other Equity Instruments Exercised Or Vested In Share-Based Payment Arrangement

moln_ValueOfOtherEquityInstrumentsExercisedOrVestedInShareBasedPaymentArrangement

168,000

Value Of Other Equity Instruments Exercised Or Vested In Share-Based Payment Arrangement

moln_ValueOfOtherEquityInstrumentsExercisedOrVestedInShareBasedPaymentArrangement

SFr 9,000

Number Of Shares Withheld To Cover Social Security And Tax Liabilities

moln_NumberOfSharesWithheldToCoverSocialSecurityAndTaxLiabilities

88,790

Number Of Shares Withheld To Cover Social Security And Tax Liabilities

moln_NumberOfSharesWithheldToCoverSocialSecurityAndTaxLiabilities

6,840

Number Of Shares Withheld To Cover Social Security And Tax Liabilities

moln_NumberOfSharesWithheldToCoverSocialSecurityAndTaxLiabilities

95,630

Weighted Average Exercise Price Of Other Equity Instruments, Shares Withheld To Cover Social Security And Tax Liabilities Shares Withheld To Cover Social Security And Tax Liabilities

moln_WeightedAverageExercisePriceOfOtherEquityInstrumentsSharesWithheldToCoverSocialSecurityAndTaxLiabilitiesSharesWithheldToCoverSocialSecurityAndTaxLiabilities

SFr 3.41

Weighted Average Exercise Price Of Other Equity Instruments, Shares Withheld To Cover Social Security And Tax Liabilities Shares Withheld To Cover Social Security And Tax Liabilities

moln_WeightedAverageExercisePriceOfOtherEquityInstrumentsSharesWithheldToCoverSocialSecurityAndTaxLiabilitiesSharesWithheldToCoverSocialSecurityAndTaxLiabilities

SFr 3.28

Shares Withheld To Cover Social Security And Tax Liabilities, Value

moln_SharesWithheldToCoverSocialSecurityAndTaxLiabilitiesValue

SFr 303,000

Shares Withheld To Cover Social Security And Tax Liabilities, Value

moln_SharesWithheldToCoverSocialSecurityAndTaxLiabilitiesValue

SFr 22,000

Disclosure Of Detailed Information About Trade And Other Payables [Table Text Block]

moln_DisclosureOfDetailedInformationAboutTradeAndOtherPayablesTableTextBlock


in CHF thousands	2025	2024
Trade payables	937	679
Social security	828	1,177


Other payables	1	3
Balance at December 31	1,767	1,859

Trade payables are denominated in the following currencies:


in CHF thousands	2025	2024
CHF	527	361
EUR	215	187
USD	171	76
GBP	23	55
Balance at December 31	937	679

Disclosure Of Current Accrued Expenses And Other Current Liabilities Explanatory [Table Text Block]

moln_DisclosureOfCurrentAccruedExpensesAndOtherCurrentLiabilitiesExplanatoryTableTextBlock


in CHF thousands	2025	2024
Accrued project costs and royalties	2,268	2,057
Accrued payroll, bonuses and restructuring 2025	5,330	5,068
Other	456	584
Balance at December 31	8,055	7,709

Current Accrued Project Costs And Royalties

moln_CurrentAccruedProjectCostsAndRoyalties

SFr 2,268,000

Current Accrued Project Costs And Royalties

moln_CurrentAccruedProjectCostsAndRoyalties

2,057,000

Research Consumables And External Research And Development Expense

moln_ResearchConsumablesAndExternalResearchAndDevelopmentExpense

11,171,000

Research Consumables And External Research And Development Expense

moln_ResearchConsumablesAndExternalResearchAndDevelopmentExpense

17,529,000

Research Consumables And External Research And Development Expense

moln_ResearchConsumablesAndExternalResearchAndDevelopmentExpense

15,892,000

Intellectual Property Expense

moln_IntellectualPropertyExpense

504,000

Intellectual Property Expense

moln_IntellectualPropertyExpense

515,000

Intellectual Property Expense

moln_IntellectualPropertyExpense

853,000

Other Research And Development Expense 1

moln_OtherResearchAndDevelopmentExpense1

763,000

Other Research And Development Expense 1

moln_OtherResearchAndDevelopmentExpense1

765,000

Other Research And Development Expense 1

moln_OtherResearchAndDevelopmentExpense1

660,000

Royalties And License Fees Expense

moln_RoyaltiesAndLicenseFeesExpense

10,000

Royalties And License Fees Expense

moln_RoyaltiesAndLicenseFeesExpense

10,000

Royalties And License Fees Expense

moln_RoyaltiesAndLicenseFeesExpense

10,000

Other Restructuring Expenses

moln_OtherRestructuringExpenses

193,000

Other Restructuring Expenses

moln_OtherRestructuringExpenses

Other Restructuring Expenses

moln_OtherRestructuringExpenses

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

2,132,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

1,833,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

3,447,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

1,653,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

1,586,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

2,260,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

142,000

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost

moln_PostEmploymentBenefitCostAndShareBasedCompensationCostNonCashEffectiveCost

SFr 0

Disclosure Of Royalties And License Fees [Text Block]

moln_DisclosureOfRoyaltiesAndLicenseFeesTextBlock

Royalties and license feesThe Group holds a non-exclusive perpetual license from the University of Zurich on patent applications and patents relating to Phage Display technology. The amount payable by the Group is CHF 10,000 per annum.

Royalties, Minimum Annual Amount, Total

moln_RoyaltiesMinimumAnnualAmountTotal

SFr 10,000

Curtailment Gain (Loss), Defined Benefit Plans

moln_CurtailmentGainLossDefinedBenefitPlans

1,187,000

Curtailment Gain (Loss), Defined Benefit Plans

moln_CurtailmentGainLossDefinedBenefitPlans

Curtailment Gain (Loss), Defined Benefit Plans

moln_CurtailmentGainLossDefinedBenefitPlans

Service Cost And Administrative Cost, Defined Benefit Plans

moln_ServiceCostAndAdministrativeCostDefinedBenefitPlans

1,551,000

Service Cost And Administrative Cost, Defined Benefit Plans

moln_ServiceCostAndAdministrativeCostDefinedBenefitPlans

1,393,000

Service Cost And Administrative Cost, Defined Benefit Plans

moln_ServiceCostAndAdministrativeCostDefinedBenefitPlans

2,576,000

Increase (Decrease) In Net Defined Benefit Liability (Asset) Resulting From Curtailment

moln_IncreaseDecreaseInNetDefinedBenefitLiabilityAssetResultingFromCurtailment

1,187,000

Increase (Decrease) In Net Defined Benefit Liability (Asset) Resulting From Curtailment

moln_IncreaseDecreaseInNetDefinedBenefitLiabilityAssetResultingFromCurtailment

Actuarial Gains (Losses), Net Of Tax, Defined Benefit Plans

moln_ActuarialGainsLossesNetOfTaxDefinedBenefitPlans

(5,278,000)

Actuarial Gains (Losses), Net Of Tax, Defined Benefit Plans

moln_ActuarialGainsLossesNetOfTaxDefinedBenefitPlans

(3,492,000)

Actuarial Gains (Losses), Net Of Tax, Defined Benefit Plans

moln_ActuarialGainsLossesNetOfTaxDefinedBenefitPlans

(2,634,000)

Property Occupied Or Other Assets Used By Entity Included In Fair Value Of Plan Assets

moln_PropertyOccupiedOrOtherAssetsUsedByEntityIncludedInFairValueOfPlanAssets

Property Occupied Or Other Assets Used By Entity Included In Fair Value Of Plan Assets

moln_PropertyOccupiedOrOtherAssetsUsedByEntityIncludedInFairValueOfPlanAssets

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

66,299,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

60,728,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

62,838,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

57,297,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

63,361,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

57,785,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

64,665,000

Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption

59,058,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

61,417,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

55,875,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

64,723,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

59,149,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

64,179,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

58,623,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

62,865,000

Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption

moln_DefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption

SFr 57,360,000

Reasonably Possible Increase In Actuarial Assumptions, Period

moln_ReasonablyPossibleIncreaseInActuarialAssumptionsPeriod

1 year

Reasonably Possible Increase In Actuarial Assumptions, Period

moln_ReasonablyPossibleIncreaseInActuarialAssumptionsPeriod

1 year

Reasonably Possible Decrease In Actuarial Assumptions, Period

moln_ReasonablyPossibleDecreaseInActuarialAssumptionsPeriod

1 year

Reasonably Possible Decrease In Actuarial Assumptions, Period

moln_ReasonablyPossibleDecreaseInActuarialAssumptionsPeriod

1 year

Accrued Sabbatical Cost

moln_AccruedSabbaticalCost

SFr 306,000

Accrued Sabbatical Cost

moln_AccruedSabbaticalCost

359,000

Accrued Sabbatical Cost

moln_AccruedSabbaticalCost

343,000

Post-Employment Benefit Expense, Non-Cash Effective Pension Cost

moln_PostEmploymentBenefitExpenseNonCashEffectivePensionCost

385,000

Post-Employment Benefit Expense, Non-Cash Effective Pension Cost

moln_PostEmploymentBenefitExpenseNonCashEffectivePensionCost

532,000

Post-Employment Benefit Expense, Non-Cash Effective Pension Cost

moln_PostEmploymentBenefitExpenseNonCashEffectivePensionCost

390,000

Post-Employment Benefit Expense, Non-Cash Effective Pension Cost

moln_PostEmploymentBenefitExpenseNonCashEffectivePensionCost

108,000

Post-Employment Benefit Expense, Non-Cash Effective Pension Cost

moln_PostEmploymentBenefitExpenseNonCashEffectivePensionCost

154,000

Post-Employment Benefit Expense, Non-Cash Effective Pension Cost

moln_PostEmploymentBenefitExpenseNonCashEffectivePensionCost

SFr 110,000

Actuarial Assumptions, Possible Increase (Decrease) In Longevity For Most Of The Age Categories

moln_ActuarialAssumptionsPossibleIncreaseDecreaseInLongevityForMostOfTheAgeCategories

1 year

Vesting Requirements For Share-Based Payment Arrangement, Number Of Tranches

moln_VestingRequirementsForShareBasedPaymentArrangementNumberOfTranches

Number Of Other Equity Instruments Issued In Share-Based Payment Arrangement, In Percentage Of Number Granted

moln_NumberOfOtherEquityInstrumentsIssuedInShareBasedPaymentArrangementInPercentageOfNumberGranted

0.00%

Number Of Other Equity Instruments Issued In Share-Based Payment Arrangement, In Percentage Of Number Granted

moln_NumberOfOtherEquityInstrumentsIssuedInShareBasedPaymentArrangementInPercentageOfNumberGranted

150.00%

Disclosure Of Detailed Information About Financial Income [Table Text Block]

moln_DisclosureOfDetailedInformationAboutFinancialIncomeTableTextBlock

Financial income


in CHF thousands	2025	2024	2023
Interest income on financial assets held at amortized costs	1,522	3,384	4,279
Net foreign exchange gain	—	3,830	—
Total year ended December 31	1,522	7,214	4,279

Disclosure Of Detailed Information About Financial Expense [Table Text Block]

moln_DisclosureOfDetailedInformationAboutFinancialExpenseTableTextBlock

Financial expense


in CHF thousands	2025	2024	2023
Net foreign exchange loss	(5,013)	—	(5,106)
Negative interest on financial assets held at amortized costs	—	(1)	—
Interest expense on leases	(18)	(24)	(34)
Other financial expenses	(15)	(13)	(15)
Total year ended December 31	(5,047)	(38)	(5,155)

Negative Interest Revenue For Financial Assets Measured At Amortised Cost

moln_NegativeInterestRevenueForFinancialAssetsMeasuredAtAmortisedCost

SFr 0

Negative Interest Revenue For Financial Assets Measured At Amortised Cost

moln_NegativeInterestRevenueForFinancialAssetsMeasuredAtAmortisedCost

1,000

Negative Interest Revenue For Financial Assets Measured At Amortised Cost

moln_NegativeInterestRevenueForFinancialAssetsMeasuredAtAmortisedCost

SFr 0

Disclosure Of Movement Of Lease Liabilities [Table Text Block]

moln_DisclosureOfMovementOfLeaseLiabilitiesTableTextBlock

Set out below are the carrying amounts of the lease liabilities and the movements during the period:


in CHF thousands	2025	2024
as at January 1,	2,444	3,652
Lease extension	2,414	—

Recognition of interest on lease liabilities	18	24
Payments	(1,231)	(1,232)
Balance as at December 31,	3,644	2,444

Current	1,206	1,217
Non-current	2,438	1,227
Balance as at December 31,	3,644	2,444

Increase Through New Leases And Lease Extension, Operating Leases

moln_IncreaseThroughNewLeasesAndLeaseExtensionOperatingLeases

SFr 2,414,000

Increase Through New Leases And Lease Extension, Operating Leases

moln_IncreaseThroughNewLeasesAndLeaseExtensionOperatingLeases

Lease, Cost Recognised In Profit Or Loss

moln_LeaseCostRecognisedInProfitOrLoss

1,218,000

Lease, Cost Recognised In Profit Or Loss

moln_LeaseCostRecognisedInProfitOrLoss

1,224,000

Lease, Cost Recognised In Profit Or Loss

moln_LeaseCostRecognisedInProfitOrLoss

SFr 1,234,000

Restructuring Activities, Number of Positions Eliminated

moln_RestructuringActivitiesNumberOfPositionsEliminated

Payments Of Restructuring Activities

moln_PaymentsOfRestructuringActivities

SFr 501,000

Vesting Of Share-Based Payment Arrangement, Tranche One [Member]

Award Vesting Percentage Of Share-Based Payment Arrangement

moln_AwardVestingPercentageOfShareBasedPaymentArrangement

33.33%

Vesting Of Share-Based Payment Arrangement, Tranche Two [Member]

Award Vesting Percentage Of Share-Based Payment Arrangement

moln_AwardVestingPercentageOfShareBasedPaymentArrangement

33.33%

Vesting Of Share-Based Payment Arrangement, Tranche Three [Member]

Award Vesting Percentage Of Share-Based Payment Arrangement

moln_AwardVestingPercentageOfShareBasedPaymentArrangement

33.33%

Minimum [Member]

Capital Range Limit

moln_CapitalRangeLimit

SFr 3,672,011

Capital Range Limit

moln_CapitalRangeLimit

SFr 5,490,880

Lease, Term Of Contract

moln_LeaseTermOfContract

2 years

Maximum [Member]

Capital Range Limit

moln_CapitalRangeLimit

SFr 5,489,726

Capital Range Limit

moln_CapitalRangeLimit

SFr 3,673,165

Lease, Term Of Contract

moln_LeaseTermOfContract

10 years

Lease, Extension Or Termination Option, Period

moln_LeaseExtensionOrTerminationOptionPeriod

1 year

United States of America, Dollars

Number Of Short-Term Time Deposit Positions

moln_NumberOfShortTermTimeDepositPositions

Number Of Banks Where Deposits Are Held

moln_NumberOfBanksWhereDepositsAreHeld

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

SFr 2,289,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

4,468,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

4,718,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

115,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

224,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

SFr 235,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

SFr 2,289,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

4,468,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

4,718,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

115,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

224,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

SFr 235,000

Switzerland, Francs

Number Of Short-Term Time Deposit Positions

moln_NumberOfShortTermTimeDepositPositions

Number Of Short-Term Time Deposit Positions

moln_NumberOfShortTermTimeDepositPositions

Number Of Banks Where Deposits Are Held

moln_NumberOfBanksWhereDepositsAreHeld

Number Of Banks Where Deposits Are Held

moln_NumberOfBanksWhereDepositsAreHeld

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

SFr 348,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

508,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

SFr 674,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

0.50%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

SFr 348,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

508,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

SFr 674,000

Euro Member Countries, Euro

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

SFr 33,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

291,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableEffectOnResultBeforeTax

SFr 479,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Percent

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent

10.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

SFr 33,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

291,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax

moln_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableEffectOnResultBeforeTax

SFr 479,000

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	We have implemented and maintain various information security processes designed to identify, assess and manage material risks from cybersecurity threats to our critical computer networks, third party hosted services, communications systems, hardware and software, and our critical data, including intellectual property, confidential information that is proprietary, strategic or competitive in nature, and clinical trial data, or Information Systems and Data. Our information security function, legal team, and management board help identify, assess and manage the Company’s cybersecurity threats and risks. We identify and assess risks from cybersecurity threats by monitoring and evaluating our threat environment using various methods including, for example manual and automated tools, evaluating our and our industry’s risk profile, evaluating threats reported to us, audits, conducting threat assessments, and conducting tabletop incident response exercises. Depending on the environment, we implement and maintain various technical, physical, and organizational measures, processes, and policies designed to manage and mitigate material risks from cybersecurity threats to our Information Systems and Data, including, for example: an incident response plan, disaster recovery/business continuity plans, risk assessments, network security controls, access controls, vendor risk management processes, employee training, and written IT policies. Our assessment and management of material risks from cybersecurity threats are integrated into our overall risk management processes. For example, we prioritize and mitigate cybersecurity threats that we assess are more likely to lead to a material impact to our business. We use third-party service providers to assist us from time to time to identify, assess, and manage material risks from cybersecurity threats, including for example professional services firms, cybersecurity consultants, penetrating testing firms, and forensic investigators. We use third-party service providers to perform a variety of functions throughout our business, such as data hosting, contract research, and contract manufacturing. We have a vendor management program to manage cybersecurity risks associated with our use of these providers. Depending on the nature of the services provided, the sensitivity of the Information Systems and Data at issue, and the identity of the provider, our vendor management process may involve, for example, different assessments designed to help identify cybersecurity risks associated with a provider and imposing contractual obligations related to cybersecurity on the provider. For a description of the risks from cybersecurity threats that may materially affect the Company and how they may do so. See “Risk Factors—General Risks— If our data or information technology systems, or those of the third parties with whom we work, are or were compromised, we could experience adverse consequences resulting from such a compromise, including but not limited to, regulatory investigations or actions; litigation; fines and penalties; disruptions of our business operations; reputational harm; loss of revenue or profits; loss of customers or sales; and other adverse consequences.”
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Our assessment and management of material risks from cybersecurity threats are integrated into our overall risk management processes. For example, we prioritize and mitigate cybersecurity threats that we assess are more likely to lead to a material impact to our business.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Our board of directors addresses the Company’s cybersecurity risk management as part of its general oversight function. The board of directors’ audit and finance committee is responsible for overseeing Company’s cybersecurity risk management processes, including oversight and mitigation of risks from cybersecurity threats.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Our cybersecurity incident response processes are designed to escalate certain cybersecurity incidents to members of management depending on the circumstances, including to Messers. Arican, Pitzner and Hendriks, who work with the Company’s incident response team to help the Company mitigate and remediate cybersecurity incidents of which they are notified. In addition, the Company’s incident response process includes reporting to the audit of the board of directors for certain cybersecurity incidents.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The board receives periodic reports from Mr. Arican concerning the Company’s significant cybersecurity threats and risk and the processes the Company has implemented to address them. The board also receives various reports, summaries or presentations related to cybersecurity threats, risk and mitigation.
Cybersecurity Risk Role of Management [Text Block]	Our cybersecurity risk assessment and management processes are implemented and maintained by certain Company management, including: •Baris Arican, Vice President of Information Technology. Mr. Arican has over 20 years experience in information technology/security at life sciences companies, including as the Chief Information Officer. •Michael Pitzner, General Counsel and Compliance Officer and Senior Vice President of Legal and Business Development. Mr. Pitzner worked in various senior legal roles at other life sciences companies prior to joining our company. •Robert Hendriks, Senior Vice President Finance and Principal Financial Officer. Mr. Hendriks worked in various senior finance roles at other life sciences companies prior to joining our company. Company management is responsible for hiring appropriate personnel, communicating key priorities to relevant personnel, helping prepare for cybersecurity incidents, approving cybersecurity processes. Our cybersecurity incident response processes are designed to escalate certain cybersecurity incidents to members of management depending on the circumstances, including to Messers. Arican, Pitzner and Hendriks, who work with the Company’s incident response team to help the Company mitigate and remediate cybersecurity incidents of which they are notified. In addition, the Company’s incident response process includes reporting to the audit of the board of directors for certain cybersecurity incidents. The board receives periodic reports from Mr. Arican concerning the Company’s significant cybersecurity threats and risk and the processes the Company has implemented to address them. The board also receives various reports, summaries or presentations related to cybersecurity threats, risk and mitigation.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	Our cybersecurity risk assessment and management processes are implemented and maintained by certain Company management, including: •Baris Arican, Vice President of Information Technology. Mr. Arican has over 20 years experience in information technology/security at life sciences companies, including as the Chief Information Officer. •Michael Pitzner, General Counsel and Compliance Officer and Senior Vice President of Legal and Business Development. Mr. Pitzner worked in various senior legal roles at other life sciences companies prior to joining our company. •Robert Hendriks, Senior Vice President Finance and Principal Financial Officer. Mr. Hendriks worked in various senior finance roles at other life sciences companies prior to joining our company.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Baris Arican, Vice President of Information Technology. Mr. Arican has over 20 years experience in information technology/security at life sciences companies, including as the Chief Information Officer. •Michael Pitzner, General Counsel and Compliance Officer and Senior Vice President of Legal and Business Development. Mr. Pitzner worked in various senior legal roles at other life sciences companies prior to joining our company. •Robert Hendriks, Senior Vice President Finance and Principal Financial Officer. Mr. Hendriks worked in various senior finance roles at other life sciences companies prior to joining our company.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Company management is responsible for hiring appropriate personnel, communicating key priorities to relevant personnel, helping prepare for cybersecurity incidents, approving cybersecurity processes. Our cybersecurity incident response processes are designed to escalate certain cybersecurity incidents to members of management depending on the circumstances, including to Messers. Arican, Pitzner and Hendriks, who work with the Company’s incident response team to help the Company mitigate and remediate cybersecurity incidents of which they are notified. In addition, the Company’s incident response process includes reporting to the audit of the board of directors for certain cybersecurity incidents. The board receives periodic reports from Mr. Arican concerning the Company’s significant cybersecurity threats and risk and the processes the Company has implemented to address them. The board also receives various reports, summaries or presentations related to cybersecurity threats, risk and mitigation.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Personnel expenses

12 Months Ended

Dec. 31, 2025

Personnel Expenses [Abstract]

Personnel expenses


in CHF thousands	2025	2024	2023
Salaries	(26,442)	(27,031)	(27,022)
Share-based compensation (non-cash effective)	(4,419)	(4,105)	(5,207)
Pension costs	(1,599)	(1,467)	(2,632)
Social security costs	(2,407)	(2,449)	(2,201)
Other personnel expenses	(2,525)	(2,644)	(2,954)
Total year ended December 31	(37,392)	(37,696)	(40,016)

Full-time equivalents and head count	2025	2024	2023
Average number of full-time equivalents	151.8	161.7	167.8
Full-time equivalents at year end	134.0	158.5	167.5
Headcount at year end	149	174	182

18.1 Pension costs and liabilities


in CHF thousands	2025		2024
Defined benefit pension plans
Actuarial assumptions
Discount rate at January 1	1.00	%	1.50	%
Discount rate at December 31 (1)	1.25	%	1.00	%
Future salary increases at December 31	2.00	%	2.00	%
Mortality tables	BVG2020 GT		BVG2020 GT
Date of last actuarial valuation	31.12.2025		31.12.2024
Reconciliation of the amount recognized in the statement of financial position
Defined benefit obligation at December 31	63,767		58,210
Fair value of plan assets at December 31	55,926		53,690
Net defined benefit liability at December 31 (2)	7,841		4,520
Components of defined benefit cost in profit or loss
Current service cost (employer)	2,607		2,662
Curtailment (6)	(1,187)		—
Past service cost (5)	101		(1,297)
Interest expense on defined benefit obligation	659		836
Interest income on plan assets	(611)		(761)
Administrative cost excl. cost for managing plan assets	29		27
Defined benefit cost recognized in profit or loss	1,599		1,467
thereof service cost and administrative cost	1,551		1,393
thereof net interest expense on the net defined benefit liability	48		74


Reconciliation of net defined benefit liability
Net defined benefit liability at January 1	4,520	4,720
Defined benefit cost recognized in profit or loss (3)	1,599	1,467
Remeasurement of net pension liabilities	3,814	485
Contributions by the employer (3)	(2,091)	(2,153)
Net defined benefit liability at December 31 (2)	7,841	4,520
Reconciliation of defined benefit obligation
Defined benefit obligation at January 1	58,210	56,347
Interest expenses on defined benefit obligation	659	836
Current service cost (employer)	2,607	2,662
Contributions by plan participants	1,319	1,352
Benefits (paid)/deposited	(3,250)	(5,210)
Curtailment (6)	(1,187)	—
Past service cost	101	(1,297)
Administrative cost (excl. cost for managing plan assets)	29	28
Actuarial (gain)/loss on defined benefit obligation	5,278	3,492
Defined benefit obligation at December 31	63,767	58,210
Reconciliation of amount recognized in OCI
Actuarial (gain) / loss on changes in financial assumptions	3,145	3,708
Actuarial (gain) / loss on changes in demographic assumptions	—	—
Actuarial (gain) / loss arising from experience adjustments	2,133	(216)
Actuarial (gain)/loss on defined benefit obligation	5,278	3,492
Return on plan assets excluding interest income	(1,464)	(3,007)
Remeasurement of net pension liabilities	3,814	485
Reconciliation of fair value of plan assets
Fair value of plan assets at January 1	53,690	51,627
Interest income on plan assets	611	761
Contributions by the employer	2,091	2,153
Contributions by plan participants	1,319	1,352
Benefits (paid)/deposited	(3,250)	(5,210)
Return on plan assets excl. interest income	1,464	3,007
Fair value of plan assets at December 31	55,926	53,690
Best estimate of contributions of next year
Contributions by the employer	1,804	2,128
Plan asset classes
Cash and cash equivalents	8,022	7,254
Equity instruments	24,534	23,455
Debt instruments (e.g. bonds)	10,887	10,391
Real estate funds	1,667	2,086
Others	1,250	1,961
Total plan assets at fair value (quoted market price)	46,359	45,147
Others	9,567	8,543
Total plan assets at fair value (non-quoted market price)	9,567	8,543
Total plan assets at fair value at December 31	55,926	53,690
thereof entity's own transferable financial instruments	—	—


thereof property occupied or other assets used by the entity	—	—
Sensitivity (4)
Defined benefit obligation at December 31 with discount rate -0.25%	66,299	60,728
Defined benefit obligation at December 31 with discount rate +0.25%	61,417	55,875
Defined benefit obligation at December 31 with interest rate on retirement savings capital -0.25%	62,838	57,297
Defined benefit obligation at December 31 with interest rate on retirement savings capital +0.25%	64,723	59,149
Defined benefit obligation at December 31 with salary increases -0.25%	63,361	57,785
Defined benefit obligation at December 31 with salary increases +0.25%	64,179	58,623
Defined benefit obligation at December 31 with life expectancy +1 year	64,665	59,058
Defined benefit obligation at December 31 with life expectancy -1 year	62,865	57,360
Maturity profile of defined benefit obligation
Weighted average duration of defined obligation in years at December 31	15.5	16.8
Weighted average duration of defined obligation in years at December 31 for active members	15.3	16.7
Weighted average duration of defined obligation in years at December 31 for pensioners	17.2	17.9

(1) Discount rates are based on industry benchmarks with a duration consistent with the weighted average duration of defined benefit obligation.
(2) In liabilities for employee benefits, as presented in the consolidated statement of financial position included are also TCHF 306 (2024: TCHF 359; 2023: TCHF 343) for accrued sabbatical cost.

(3) The sum of these two positions represent the non-cash effective pension costs recognized in the profit and loss section of the consolidated statement of profit or loss and other comprehensive result of which TCHF 385 are research and development costs (2024: TCHF 532; 2023: TCHF 390) and TCHF 108 are selling, general and administrative costs (2024: TCHF 154; 2023: TCHF 110).

(4) For the most important parameters which influence the pension obligation of the Company a sensitivity analysis was performed. The discount rate and the assumption for salary increases were modified by a certain percentage value. Sensitivity on mortality was calculated by changing the mortality with a constant factor for all age groups. With this procedure the Company could change the longevity for most of the age categories by one year longer or shorter than the baseline value.

(5) Adjustments to past service cost mainly result from plan amendments in compulsory defined benefit plan with VSAO.

(6) The curtailment event is caused by our restructuring event in June 2025. See note 26 for further information.

The table below presents the amounts that are reflected in the statement of comprehensive income for the periods indicated:


in CHF thousands	2025	2024	2023

Components of defined benefit cost in profit or loss
Current service cost (employer)	2,607	2,662	2,507
Curtailment (6)	(1,187)	—	—
Past service cost (5)	101	(1,297)	43
Interest expense on defined benefit obligation	659	836	1,182
Interest income on plan assets	(611)	(761)	(1,126)
Administrative cost excl. cost for managing plan assets	29	27	26
Defined benefit cost recognized in profit or loss	1,599	1,467	2,632
thereof service cost and administrative cost	1,551	1,393	2,576
thereof net interest expense on the net defined benefit liability	48	74	56

Reconciliation of amount recognized in OCI
Actuarial (gain) / loss on changes in financial assumptions	3,145	3,708	3,644
Actuarial (gain) / loss on changes in demographic assumptions	—	—	(10)
Actuarial (gain) / loss arising from experience adjustments	2,133	(216)	(1,000)
Actuarial (gain)/loss on defined benefit obligation	5,278	3,492	2,634
Return on plan assets excluding interest income	(1,464)	(3,007)	(659)
Remeasurement of net pension liabilities	3,814	485	1,975

18.2 Share-based compensation

18.2.1 Long Term Incentive (“LTI”) Plans: Restricted Share Units ("RSU'') and Performance Share Units ("PSU")

•LTI plans 2021 established in March 2021

•LTI plans 2022 established in March 2022

•LTI plans 2023 established in March 2023

•LTI Plans 2024 established in March 2024

•LTI Plans 2025 established in March 2025

Under the LTI plans, members of the Board of Directors are eligible to be granted RSUs, whereas members of the Management Board and other employees are eligible to be granted PSUs.

RSUs are contingent rights to receive a certain number of shares of the Company at the end of a three-year blocking period. The number of RSUs per plan participant is a function of the approved CHF amount per position divided by the fair value of each RSU as at the grant date. In certain circumstances, including a change of control, a full or partial accelerated vesting of the RSUs may occur. RSUs vest over a one-year period from date of grant.

PSUs are contingent rights to receive a variable number of shares of the Company. Since 2021, PSUs granted to employees (except for members of the Management Board) will vest in three tranches of one third each. The first tranche of the PSUs shall vest on the first anniversary of the grant date, the second tranche on the second anniversary of the grant date and the third tranche on the third anniversary of the grant date. For the members of the Management Board PSUs will vest at the end of a three year cliff-vesting period.

The number of PSUs per plan participant is a function of the approved CHF amount per position divided by the fair value of each PSU as of the grant date. While the PSUs are designed to let the beneficiaries participate in the long-term share price development, the number of shares to be earned in relation to a PSU also depends on the achievement of pre-defined corporate goals for the respective year. Accordingly, the number of shares to be issued based on the PSUs can be between zero and 150% of the number of PSUs granted. Even after the determination of goal achievement, participants may lose their entitlements in full or in part depending on certain conditions relating to their employment. In certain circumstances, including a change of control, a full or partial accelerated vesting of the PSUs may occur.

The LTI plans are issued annually, which allows the Board of Directors to review the terms and determine the targets on an annual basis. Employees generally receive the grants on April 1 of each calendar year, or for new employees on the first day of the calendar quarter after the start of their employment. Members of the Management Board and the Board of Directors receive the annual grants after the approval of the ordinary shareholders’ meeting.

As of December 31, 2025, 2,918,458 PSUs and 504,543 RSUs were outstanding. As of December 31, 2024, 2,247,267 PSUs and 345,798 RSUs were outstanding.

18.2.2 Conditions attached to and measurement of fair values of equity-settled share-based payment arrangements

The following table provides the conditions as well as the inputs used in the measurement of the values at grant dates:


RSU/PSU, conditions and assumptions	2025	2024
Nature of arrangement	Grant of PSU/RSU	Grant of PSU/RSU
Grant date RSU	April 16, 2025	April 17, 2024
Grant dates PSU	Jan 1 - Oct 1	Jan 1 - Oct 1
Number of RSU granted	191,760	192,639
Number of PSU granted	1,814,004	1,690,241
Weighted average exercise price (CHF)	0.10	0.10
Share price (CHF)	2.90 - 4.06	3.38 - 6.57
Vesting period for RSU (years)	1.00	1.00
Full contractual life for RSU (years)	3.00	3.00
Vesting period for PSU (years), Management Board	3.00	3.00
Vesting period for PSU (years), employees excluding Management Board	3.00 (pro-rata annual vesting)	3.00 (pro-rata annual vesting)
Full contractual life for PSU (years)	3.00	3.00
Settlement	Common Shares	Common Shares
Expected volatility on Common shares	59.10 - 70.46	66.87 - 72.79
Risk-free interest rate p. a. (%) / CHF SARON / Common shares	0.35 - 1.30	1.47 - 1.65
Expected volatility on NBI	19.74 - 21.89	21.93 - 23.14
Risk-free interest rate p. a. (%) / USD CME Term SOFR / NBI	3.63 - 4.18	3.82 - 5.21
Expected volatility on SPI	12.07 - 13.28	12.72 - 13.07
Risk-free interest rate p. a. (%) / CHF SARON / SPI	0.35 - 1.30	1.47 - 1.65
Expected dividend (CHF)	—	—
Weighted average fair value of rights granted (CHF)	3.15	3.43
Latest expiry date	Sep 30, 2028	Sep 30, 2027
Valuation model	Monte Carlo	Monte Carlo

Additional comments:

•Expected volatility: Historical share prices of the Company have been used.

•The indices, Nasdaq Biotechnology Index ('NBI") and Swiss performance Index ("SPI") are used as inputs in determining the fair values for the 2024 and 2025 PSU Plans.

The movements in the number of all issued RSUs, PSUs and share options are as follows:


Share option / PSU / RSU movements	Total (numbers)	Weighted average exercise price (CHF)	Options (numbers)	Weighted average exercise price (CHF)	PSU/RSU (numbers)	Weighted average exercise price (CHF)
Balance outstanding at December 31, 2023	1,812,766	1.16	282,105	6.89	1,530,661	0.10
Granted	1,882,880	0.10	—	—	1,882,880	0.10
(Performance adjustment) (1)	(259,442)	0.10	—	—	(259,442)	0.10
(Forfeited) (2)	(195,725)	0.10	—	—	(195,725)	0.10
(Expired)	(281,604)	6.89	(281,604)	6.89		—
(Exercised options, vested PSU / RSU) (3)	(365,810)	0.10	(501)	6.94	(365,309)	0.10
Balance outstanding at December 31, 2024	2,593,065	0.10	—	—	2,593,065	0.10
Granted	2,005,764	0.10	—	—	2,005,764	0.10
(Performance adjustment) (1)	(315,797)	0.10	—	—	(315,797)	0.10
(Forfeited) (2)	(215,828)	0.10	—	—	(215,828)	0.10
(Expired)	—	—	—	—		—
(Exercised options, vested PSU / RSU) (3)	(644,203)	0.10	—	—	(644,203)	0.10
Balance outstanding at December 31, 2025	3,423,001	0.10	—	—	3,423,001	0.10

(1) Performance adjustments indicate forfeitures due to non-market performance conditions not achieved

(2) Forfeited due to service conditions not fulfilled

(3) The weighted average share prices at the dates of exercising options during the year 2024 amounted to CHF 7.00. There were no options exercised in 2025.

The following table applies to all PSUs and RSUs outstanding at December 31, 2025:


Exercise price CHF	PSU/RSU (number)	Remaining life (years)





PSU/RSU
0.10	3,423,001	1.3
Total	3,423,001

The following table applies to all PSUs and RSUs outstanding at December 31, 2024:


Exercise price CHF	PSU/RSU (number)	Remaining life (years)





PSU/RSU
0.1	2,593,065	1.4
Total	2,593,065

The non-cash costs for share-based payments recognized in the statement of comprehensive income can be attributed to the Group’s two functions as follows:


in CHF thousands	2025	2024	2023
Research and development	2,517	2,365	3,057
Selling, general and administrative	1,760	1,740	2,150
Total year ended December 31	4,277	4,105	5,207

In addition there are non-cash cost for share-based payments of TCHF 142 recognized under restructuring expenses. See note 26.

Cover	12 Months Ended
Cover	Dec. 31, 2025 shares
Document Information [Line Items]
Document Type	20-F
Document Registration Statement	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Document Shell Company Report	false
Entity File Number	001-40488
Entity Registrant Name	MOLECULAR PARTNERS AG
Entity Incorporation, State or Country Code	V8
Entity Address, Address Line One	Wagistrasse 14
Entity Address, Postal Zip Code	8952
Entity Address, City or Town	Zurich-Schlieren
Entity Address, Country	CH
Title of 12(b) Security	Ordinary shares, CHF 0.10 nominal value per share
Trading Symbol	MOLN
No trading symbol	true
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding	40,374,641
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Document Accounting Standard	International Financial Reporting Standards
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Entity Central Index Key	0001745114
Business Contact
Document Information [Line Items]
Entity Address, Address Line One	Wagistrasse 14
Entity Address, Postal Zip Code	8952
Entity Address, City or Town	Zurich-Schlieren
Entity Address, Country	CH
Contact Personnel Name	Patrick Amstutz
Country Region	41
City Area Code	44
Local Phone Number	755 77 00

Summary of material accounting policies - Segment Reporting (Details)	12 Months Ended
	Dec. 31, 2025 segment
Disclosure Of Significant Accounting Policies [Abstract]
Number of operating segments	1

Personnel expenses - Disclosure of Exercise Prices, Number and Weighted Average Remaining Contractual Life of Outstanding Instruments (Details)	12 Months Ended
	Dec. 31, 2025 shares SFr / shares	Dec. 31, 2024 shares SFr / shares	Dec. 31, 2023 shares
Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments [Line Items]
Exercise price of outstanding PSUs and RSUs (in CHF per share) \| SFr / shares	SFr 0.1	SFr 0.1
Weighted average remaining contractual life of outstanding PSUs and RSUs	1 year 3 months 18 days	1 year 4 months 24 days
Number of instruments outstanding (in shares) \| shares	3,423,001	2,593,065	1,812,766

Summary of material accounting policies (Policies)	12 Months Ended
Summary of material accounting policies (Policies)	Dec. 31, 2025
Disclosure Of Significant Accounting Policies [Abstract]
Basis of consolidation	Basis of consolidation (i) Subsidiaries Subsidiaries are entities controlled by the Company. The Company controls an entity when it is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. The financial statements of subsidiaries are included in the consolidated financial statements from the date on which control commences until the date on which control ceases. (ii) Transactions eliminated on consolidation Intra-group balances and transactions, and any unrealized income and expenses arising from intra-group transactions, are eliminated.
Short-term time deposits	Short-term time deposits Short-term deposits comprise time deposits placed with banks with original maturities of more than three months and up to twelve months from the date of acquisition. Short-term deposits are not included in cash and cash equivalents for the purposes of the cash flow statement.

Income Taxes - Disclosure of Expiry of Tax Loss Carryforwards (Details) - CHF (SFr) SFr in Thousands	Dec. 31, 2025	Dec. 31, 2024
Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items]
Tax loss carryforwards	SFr (57,854)	SFr (195,126)

Personnel expenses - Disclosure of Movements in the Number of All Issues RSUs, PSUs and Share Options (Details)	12 Months Ended
	Dec. 31, 2025 shares SFr / shares	Dec. 31, 2024 shares SFr / shares
Personnel Expenses [Abstract]
Number of instruments outstanding, beginning of period (in shares) \| shares	2,593,065	1,812,766
Number of instruments forfeited, performance adjustment (in shares) \| shares	(315,797)	(259,442)
Number of instruments forfeited (in shares) \| shares	(215,828)	(195,725)
Number of instruments expired (in shares) \| shares	0	(281,604)
Number of instruments exercised (in shares) \| shares	(644,203)	(365,810)
Number of instruments outstanding, end of period (in shares) \| shares	3,423,001	2,593,065
Weighted average exercise price of instruments outstanding at beginning of period (in CHF per share)	SFr 0.10	SFr 1.16
Weighted average exercise price of instruments granted (in CHF per share)	0.10	0.10
Weighted average exercise price of instruments forfeited, performance adjustment (in CHF per share)	0.10	0.10
Weighted average exercise price of instruments forfeited (in CHF per share)	0.10	0.10
Weighted average exercise price of instruments expired (in CHF per share)	0	6.89
Weighted average exercise price of instruments exercised (in CHF per share)	0.10	0.10
Weighted average exercise price of instruments outstanding at end of period (in CHF per share)	SFr 0.10	SFr 0.10
Number of share options forfeited, performance adjustment (in shares) \| shares	0	0
Weighted average exercise price of share options forfeited, performance adjustment (in CHF per share)	SFr 0	SFr 0
Number of PSU and RSU forfeited, performance adjustment (in shares) \| shares	(315,797)	(259,442)
Weighted average exercise price of PSU and RSU forfeited, performance adjustment (in CHF per share)	SFr 0.10	SFr 0.10
Weighted average share price, at date of exercise (in CHF per share)		SFr 7.00

Personnel expenses - Disclosure of Conditions and Inputs Used in the Measurement of the Fair Values at Grant Dates (Details) - SFr / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Disclosure Of Number And Weighted Average Exercise Prices Of Other Equity Instruments [Line Items]
Share price (in CHF per share)	SFr 4.06	SFr 6.57
Vesting period	3 years	3 years
Full contractual life for RSU and PSU	3 years	3 years
Expected volatility on Common shares	70.46%	72.79%
Risk free interest rate, common shares	1.30%	1.65%
Expected volatility on NBI	21.89%	23.14%
Risk free interest rate, NBI	4.18%	5.21%
Expected volatility on SPI	13.28%	13.07%
Risk free interest rate, SPI	1.30%	1.65%
Expected dividend	SFr 0	SFr 0
Weighted average fair value of rights granted (in CHF per share)	SFr 3.15	SFr 3.43

Restructuring expense	12 Months Ended
Restructuring expense	Dec. 31, 2025
Restructuring Expense [Abstract]
Restructuring expense	Restructuring expense On June 10, 2025, Molecular Partners announced a planned operational efficiency initiative (“restructuring 2025”), which included a reduction in headcount within R&D. As a result 34 positions - primarily in R&D, but also in supporting functions - were impacted. For the twelve months ended December 31, 2025, the Group recognized TCHF 2,689 as an expense, of which TCHF 501 was provided for as at December 31, 2025. Of the total restructuring cost TCHF 602 related to SG&A cost and TCHF 2,087 related to R&D cost hereof TCHF142 are non-cash items related to share-based compensation costs. The remaining amount is expected to be paid out during Q1 2026.

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2025
Auditor Information [Abstract]
Auditor Firm ID	3240
Auditor Name	KPMG AG
Auditor Location	Zurich, Switzerland

Financial risk management - Additional Information (Details)	12 Months Ended
	Dec. 31, 2025 bank
Financial Risk Management [Abstract]
Number of different Swiss banks	3