NASDAQ:NAMS | Insider Transactions | NewAmsterdam Pharma Co N.V.

NAMS Insider Transactions

213 retained open-market purchase and sale rows from SEC Forms 3, 4 and 5, newest first. This page shows rows 1–100; provenance stays internal.

NAMS insiders transaction timeline

PurchaseSale
2024-02-13: 1 purchase — LANGE LOUIS G2024-03-26: 1 purchase — Topper James N2024-03-26: 1 sale — Kastelein Johannes Jacob Pieter2024-06-20: 1 purchase — Davidson Michael H.2024-08-20: 1 purchase — Davidson Michael H.2024-09-26: 1 purchase — Audet Juliette Berangere2024-10-01: 1 sale — Kooij Louise Frederika2024-11-13: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-11-14: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-11-15: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-11-18: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-10: 10 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-11: 15 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-12: 10 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-13: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-16: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-17: 10 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-18: 10 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-19: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-20: 10 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-23: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-24: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-26: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-27: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2024-12-30: 5 sales — Forbion Capital Fund IV Cooperatief U.A., Forbion Growth Opportunities Fund I Cooperatief U.A., Forbion Growth Management B.V. and 2 more2025-01-27: 4 sales — Somaiya Mayur Ian, Kling Douglas F2025-01-28: 4 sales — Somaiya Mayur Ian, Kling Douglas F2025-01-29: 1 sale — Kling Douglas F2025-01-30: 2 sales — Kling Douglas F2025-02-18: 1 sale — Kling Douglas F2025-02-19: 1 sale — Kling Douglas F2025-03-04: 1 purchase — Topper James N2025-03-04: 1 sale — Kooij Louise Frederika2025-03-17: 1 sale — Kling Douglas F2025-03-26: 1 purchase — Topper James N2025-03-26: 2 sales — Kling Douglas F, Davidson Michael H.2025-04-15: 2 sales — Kling Douglas F2025-05-15: 1 sale — Kling Douglas F2025-06-16: 1 purchase — Topper James N2025-06-16: 2 sales — Kling Douglas F2025-06-24: 1 purchase — Topper James N2025-06-25: 1 purchase — Topper James N2025-07-15: 2 sales — Kling Douglas F2025-07-16: 1 sale — Kling Douglas F2025-08-11: 1 purchase — Topper James N2025-08-21: 1 sale — Kastelein Johannes Jacob Pieter2025-08-22: 2 sales — Kastelein Johannes Jacob Pieter2025-08-25: 1 sale — Kooij Louise Frederika2025-09-03: 1 sale — Kooij Louise Frederika2025-09-08: 1 purchase — Topper James N2025-09-09: 2 sales — Kooij Louise Frederika2025-09-15: 1 purchase — Topper James N2025-12-23: 1 sale — Kooij Louise Frederika2025-12-24: 1 sale — Kooij Louise Frederika2025-12-26: 1 sale — Kooij Louise Frederika2026-01-05: 3 sales — Kastelein Johannes Jacob Pieter, Kooij Louise Frederika, Somaiya Mayur Ian2026-01-07: 1 sale — Davidson Michael H.2026-01-20: 3 sales — Somaiya Mayur Ian2026-01-21: 2 sales — Somaiya Mayur Ian2026-01-23: 2 sales — Kooij Louise Frederika2026-01-26: 2 sales — Kooij Louise Frederika2026-01-27: 1 sale — Kooij Louise Frederika2026-01-28: 1 sale — Kooij Louise Frederika2026-02-20: 2 sales — Kastelein Johannes Jacob Pieter2026-02-24: 2 sales — Davidson Michael H.2026-02-25: 3 sales — Davidson Michael H.2026-02-26: 2 sales — Davidson Michael H.2026-03-02: 1 sale — Davidson Michael H.2026-03-05: 1 sale — Kastelein Johannes Jacob Pieter2026-03-06: 2 sales — LANGE LOUIS G, Kastelein Johannes Jacob Pieter2026-03-09: 1 sale — Kastelein Johannes Jacob Pieter2026-03-11: 2 sales — LANGE LOUIS G2026-05-26: 1 sale — Kooij Louise Frederika2026-06-22: 2 sales — Kooij Louise Frederika2026-07-20: 3 sales — Kooij Louise Frederika2026-08-24: 1 sale — Kastelein Johannes Jacob Pieter2024-02-132026-08-24
Insider profileRoleDateTransactionSharesPrice
Kastelein Johannes Jacob PieterChief Scientific Officer2026-08-24Sale125,000$26.91
Kooij Louise FrederikaChief Accounting Officer2026-07-20Sale2,915$31.71
Kooij Louise FrederikaChief Accounting Officer2026-07-20Sale31,885$31.05
Kooij Louise FrederikaChief Accounting Officer2026-07-20Sale70,200$29.96
Kooij Louise FrederikaChief Accounting Officer2026-06-22Sale300.0$30.73
Kooij Louise FrederikaChief Accounting Officer2026-06-22Sale39,700.0$30.2
Kooij Louise FrederikaChief Accounting Officer2026-05-26Sale65,000.0$35.69
LANGE LOUIS GDirector2026-03-11Sale446.0$31.23
LANGE LOUIS GDirector2026-03-11Sale44,173.0$30.41
Kastelein Johannes Jacob PieterChief Scientific Officer2026-03-09Sale101,409.0$30.29
LANGE LOUIS GDirector2026-03-06Sale28,186.0$29.41
Kastelein Johannes Jacob PieterChief Scientific Officer2026-03-06Sale94,124.0$30.32
Kastelein Johannes Jacob PieterChief Scientific Officer2026-03-05Sale104,467.0$30.3
Davidson Michael H.Chief Executive Officer2026-03-02Sale443,707.0$33.25
Davidson Michael H.Chief Executive Officer2026-02-26Sale17,924.0$34.44
Davidson Michael H.Chief Executive Officer2026-02-26Sale165,408.0$33.63
Davidson Michael H.Chief Executive Officer2026-02-25Sale1,300.0$36.68
Davidson Michael H.Chief Executive Officer2026-02-25Sale10,436.0$35.96
Davidson Michael H.Chief Executive Officer2026-02-25Sale46,517.0$35.11
Davidson Michael H.Chief Executive Officer2026-02-24Sale3,161.0$36.46
Davidson Michael H.Chief Executive Officer2026-02-24Sale61,547.0$36.13
Kastelein Johannes Jacob PieterChief Scientific Officer2026-02-20Sale30,789.0$35.46
Kastelein Johannes Jacob PieterChief Scientific Officer2026-02-20Sale14,692.0$35.0
Kooij Louise FrederikaChief Accounting Officer2026-01-28Sale32,612.0$31.8
Kooij Louise FrederikaChief Accounting Officer2026-01-27Sale39,816.0$32.62
Kooij Louise FrederikaChief Accounting Officer2026-01-26Sale309.0$33.45
Kooij Louise FrederikaChief Accounting Officer2026-01-26Sale34,091.0$32.77
Kooij Louise FrederikaChief Accounting Officer2026-01-23Sale12,767.0$34.37
Kooij Louise FrederikaChief Accounting Officer2026-01-23Sale25,405.0$33.44
Somaiya Mayur IanChief Financial Officer2026-01-21Sale24,362.0$33.8
Somaiya Mayur IanChief Financial Officer2026-01-21Sale15,422.0$33.25
Somaiya Mayur IanChief Financial Officer2026-01-20Sale19,604.0$32.38
Somaiya Mayur IanChief Financial Officer2026-01-20Sale39,712.0$31.78
Somaiya Mayur IanChief Financial Officer2026-01-20Sale900.0$30.64
Davidson Michael H.Chief Executive Officer2026-01-07Sale11,582.0—
Kastelein Johannes Jacob PieterChief Scientific Officer2026-01-05Sale6,000.0$33.25
Kooij Louise FrederikaChief Accounting Officer2026-01-05Sale2,647.0$33.25
Somaiya Mayur IanChief Financial Officer2026-01-05Sale5,118.0$33.25
Kooij Louise FrederikaChief Accounting Officer2025-12-26Sale43,872.0$35.3
Kooij Louise FrederikaChief Accounting Officer2025-12-24Sale26,011.0$35.68
Kooij Louise FrederikaChief Accounting Officer2025-12-23Sale75,117.0$36.21
Topper James NDirector2025-09-15Purchase660.0$23.7
Kooij Louise FrederikaChief Accounting Officer2025-09-09Sale96,896.0$26.11
Kooij Louise FrederikaChief Accounting Officer2025-09-09Sale53,104.0$25.31
Topper James NDirector2025-09-08Purchase1,260.0$24.99
Kooij Louise FrederikaChief Accounting Officer2025-09-03Sale18,073.0$25.09
Kooij Louise FrederikaChief Accounting Officer2025-08-25Sale8,269.0$24.86
Kastelein Johannes Jacob PieterChief Scientific Officer2025-08-22Sale7,658.0$25.49
Kastelein Johannes Jacob PieterChief Scientific Officer2025-08-22Sale42,342.0$25.08
Kastelein Johannes Jacob PieterChief Scientific Officer2025-08-21Sale50,000.0$24.29
Topper James NDirector2025-08-11Purchase471.0$23.98
Kling Douglas FChief Operating Officer2025-07-16Sale51,043.0$21.1
Kling Douglas FChief Operating Officer2025-07-15Sale3,544.0$22.12
Kling Douglas FChief Operating Officer2025-07-15Sale44,025.0$21.38
Topper James NDirector2025-06-25Purchase1,260.0$18.26
Topper James NDirector2025-06-24Purchase2,520.0$18.43
Topper James NDirector2025-06-16Purchase8,584.0$19.5
Kling Douglas FChief Operating Officer2025-06-16Sale18,109.0$19.75
Kling Douglas FChief Operating Officer2025-06-16Sale81,891.0$19.19
Kling Douglas FChief Operating Officer2025-05-15Sale100,000.0—
Kling Douglas FChief Operating Officer2025-04-15Sale910.0—
Kling Douglas FChief Operating Officer2025-04-15Sale99,090.0—
Topper James NDirector2025-03-26Purchase1,135.0$22.49
Kling Douglas FChief Operating Officer2025-03-26Sale16,539.0—
Davidson Michael H.Chief Executive Officer2025-03-26Sale12,258.0—
Kling Douglas FChief Operating Officer2025-03-17Sale100,000.0—
Topper James NDirector2025-03-04Purchase4,005.0$21.02
Kooij Louise FrederikaChief Accounting Officer2025-03-04Sale150,000.0$20.37
Kling Douglas FChief Operating Officer2025-02-19Sale9,218.0—
Kling Douglas FChief Operating Officer2025-02-18Sale90,782.0—
Kling Douglas FChief Operating Officer2025-01-30Sale8,914.0—
Kling Douglas FChief Operating Officer2025-01-30Sale4,664.0—
Kling Douglas FChief Operating Officer2025-01-29Sale56,863.0—
Somaiya Mayur IanChief Financial Officer2025-01-28Sale3,405.0—
Somaiya Mayur IanChief Financial Officer2025-01-28Sale11,495.0—
Kling Douglas FChief Operating Officer2025-01-28Sale5,148.0—
Kling Douglas FChief Operating Officer2025-01-28Sale20,237.0—
Somaiya Mayur IanChief Financial Officer2025-01-27Sale13,304.0—
Somaiya Mayur IanChief Financial Officer2025-01-27Sale33,679.0—
Kling Douglas FChief Operating Officer2025-01-27Sale23,815.0—
Kling Douglas FChief Operating Officer2025-01-27Sale80,359.0—
Forbion Capital Fund IV Cooperatief U.A.TenPercentOwner2024-12-30Sale29,846.0$25.54
Forbion Growth Opportunities Fund I Cooperatief U.A.TenPercentOwner2024-12-30Sale29,846.0$25.54
Forbion Growth Management B.V.TenPercentOwner2024-12-30Sale29,846.0$25.54
Forbion IV Management B.V.TenPercentOwner2024-12-30Sale29,846.0$25.54
ForGrowth NAP B.V.TenPercentOwner2024-12-30Sale29,846.0$25.54
Forbion Capital Fund IV Cooperatief U.A.TenPercentOwner2024-12-27Sale41,472.0$25.95
Forbion Growth Opportunities Fund I Cooperatief U.A.TenPercentOwner2024-12-27Sale41,472.0$25.95
Forbion Growth Management B.V.TenPercentOwner2024-12-27Sale41,472.0$25.95
Forbion IV Management B.V.TenPercentOwner2024-12-27Sale41,472.0$25.95
ForGrowth NAP B.V.TenPercentOwner2024-12-27Sale41,472.0$25.95
Forbion Capital Fund IV Cooperatief U.A.TenPercentOwner2024-12-26Sale33,438.0$26.01
Forbion Growth Opportunities Fund I Cooperatief U.A.TenPercentOwner2024-12-26Sale33,438.0$26.01
Forbion Growth Management B.V.TenPercentOwner2024-12-26Sale33,438.0$26.01
Forbion IV Management B.V.TenPercentOwner2024-12-26Sale33,438.0$26.01
ForGrowth NAP B.V.TenPercentOwner2024-12-26Sale33,438.0$26.01
Forbion Capital Fund IV Cooperatief U.A.TenPercentOwner2024-12-24Sale16,164.0$25.66
Forbion Growth Opportunities Fund I Cooperatief U.A.TenPercentOwner2024-12-24Sale16,164.0$25.66
Forbion Growth Management B.V.TenPercentOwner2024-12-24Sale16,164.0$25.66
Forbion IV Management B.V.TenPercentOwner2024-12-24Sale16,164.0$25.66