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NAMS Insider Trading

Insider Ownership Percentage: 20.84%
Insider Buying (Last 12 Months): $404,974.43
Insider Selling (Last 12 Months): $23,220,192.76

NewAmsterdam Pharma Insider Trading History Chart

This chart shows the insider buying and selling history at NewAmsterdam Pharma by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

NewAmsterdam Pharma Share Price & Price History

Current Price: $35.85
Price Change: ▲ Price Increase of +0.33 (0.93%)
As of 12/4/2025 05:00 PM ET

This chart shows the closing price history over time for NAMS up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

NewAmsterdam Pharma Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
9/15/2025James N. TopperDirectorBuy660$23.70$15,642.003,028,524View SEC Filing Icon  
9/9/2025Louise Frederika KooijCAOSell150,000$25.83$3,874,500.0015,000View SEC Filing Icon  
9/8/2025James N. TopperDirectorBuy1,260$24.99$31,487.403,027,864View SEC Filing Icon  
9/3/2025Louise Frederika KooijCAOSell18,073$25.09$453,451.5715,000View SEC Filing Icon  
8/25/2025Louise Frederika KooijCAOSell8,269$24.86$205,567.3415,000View SEC Filing Icon  
8/21/2025Johannes Jacob Piete KasteleinInsiderSell50,000$24.29$1,214,500.00119,302View SEC Filing Icon  
8/11/2025James N. TopperDirectorBuy471$23.98$11,294.583,026,604View SEC Filing Icon  
7/16/2025Douglas F. KlingCOOSell51,043$21.10$1,077,007.3044,000View SEC Filing Icon  
7/15/2025Douglas F. KlingCOOSell47,569$21.44$1,019,879.3644,000View SEC Filing Icon  
6/25/2025James N. TopperDirectorBuy1,260$18.26$23,007.603,026,133View SEC Filing Icon  
6/24/2025James N. TopperDirectorBuy2,520$18.43$46,443.603,024,873View SEC Filing Icon  
6/16/2025Douglas F. KlingCOOSell100,000$19.29$1,929,000.0044,000View SEC Filing Icon  
6/16/2025James N. TopperDirectorBuy8,584$19.50$167,388.003,022,153View SEC Filing Icon  
3/26/2025James N. TopperDirectorBuy1,135$22.49$25,526.153,013,569View SEC Filing Icon  
3/4/2025James N. TopperDirectorBuy4,005$21.02$84,185.103,012,434View SEC Filing Icon  
3/4/2025Louise Frederika KooijCAOSell150,000$20.37$3,055,500.0015,000View SEC Filing Icon  
12/30/2024Nap B.V. ForgrowthMajor ShareholderSell29,846$25.54$762,266.8410,656,172View SEC Filing Icon  
12/26/2024Nap B.V. ForgrowthMajor ShareholderSell33,438$26.01$869,722.3810,727,490View SEC Filing Icon  
12/23/2024Nap B.V. ForgrowthMajor ShareholderSell25,132$25.49$640,614.6810,777,092View SEC Filing Icon  
12/20/2024Nap B.V. ForgrowthMajor ShareholderSell49,772$25.60$1,274,163.2010,802,224View SEC Filing Icon  
12/18/2024Nap B.V. ForgrowthMajor ShareholderSell100,728$26.10$2,629,000.8010,908,502View SEC Filing Icon  
12/12/2024Nap B.V. ForgrowthMajor ShareholderSell166,011$25.39$4,215,019.2911,150,461View SEC Filing Icon  
11/18/2024Nap B.V. ForgrowthMajor ShareholderSell33,273$25.08$834,486.8411,778,760View SEC Filing Icon  
11/15/2024Nap B.V. ForgrowthMajor ShareholderSell8,530$25.02$213,420.6011,812,033View SEC Filing Icon  
10/1/2024Louise Frederika KooijCAOSell45,000$15.72$707,400.00View SEC Filing Icon  
9/26/2024Juliette Berangere AudetInsiderBuy1,104$15.70$17,332.801,104View SEC Filing Icon  
6/20/2024Michael H DavidsonCEOBuy5,000$17.26$86,300.00204,784View SEC Filing Icon  
3/26/2024James N. TopperDirectorBuy8,429$21.50$181,223.503,008,429View SEC Filing Icon  
3/26/2024Johannes Jacob Piete KasteleinInsiderSell190,476$21.50$4,095,234.00View SEC Filing Icon  
2/13/2024Louis G LangeDirectorBuy5,000$19.00$95,000.0024,878View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for NewAmsterdam Pharma (NASDAQ:NAMS)

89.89% of NewAmsterdam Pharma stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at NAMS by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

NewAmsterdam Pharma Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/21/2025CIBC Bancorp USA Inc.31,140$0.89M0.0%N/A0.027%Search for SEC Filing on Google Icon
11/17/2025Woodline Partners LP1,157,867$32.93M0.2%-39.0%1.021%Search for SEC Filing on Google Icon
11/17/2025Polar Capital Holdings Plc2,911,634$82.81M0.4%+15.6%2.568%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.25,936$0.74M0.0%-17.4%0.023%Search for SEC Filing on Google Icon
11/17/2025HighVista Strategies LLC31,831$0.91M0.2%+65.1%0.028%Search for SEC Filing on Google Icon
11/17/2025Fcpm Iii Services B.V.9,212,384$262M52.6%-13.4%8.124%Search for SEC Filing on Google Icon
11/17/2025Fred Alger Management LLC41,264$1.17M0.0%+87.2%0.036%Search for SEC Filing on Google Icon
11/17/2025Decheng Capital LLC657,051$18.69M3.3%-14.7%0.579%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE472,100$13.43M0.0%-2.5%0.416%Search for SEC Filing on Google Icon
11/17/2025Boothbay Fund Management LLC40,714$1.16M0.0%-32.2%0.036%Search for SEC Filing on Google Icon
11/17/2025ArrowMark Colorado Holdings LLC310,999$8.85M0.2%-13.3%0.274%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.2,141,778$60.91M0.0%-8.1%1.889%Search for SEC Filing on Google Icon
11/17/2025Ameriprise Financial Inc.145,327$4.13M0.0%-30.2%0.128%Search for SEC Filing on Google Icon
11/14/2025Viking Global Investors LP6,475,534$184.16M0.5%-7.2%5.711%Search for SEC Filing on Google Icon
11/14/2025Bellevue Group AG14,611$0.42M0.0%-28.9%0.013%Search for SEC Filing on Google Icon
11/14/2025Deerfield Management Company L.P.4,266,693$121.35M1.9%-16.6%3.788%Search for SEC Filing on Google Icon
11/14/2025Duquesne Family Office LLC1,923,700$54.71M1.3%+131.2%1.708%Search for SEC Filing on Google Icon
11/14/2025ADAR1 Capital Management LLC114,359$3.25M0.3%+1.8%0.102%Search for SEC Filing on Google Icon
11/14/2025Squarepoint Ops LLC20,959$0.60M0.0%+46.8%0.019%Search for SEC Filing on Google Icon
11/14/2025Wellington Management Group LLP4,020,126$114.33M0.0%+21.0%3.569%Search for SEC Filing on Google Icon
11/13/2025Kennedy Capital Management LLC146,715$4.17M0.1%+972.9%0.130%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG768,520$21.86M0.0%+22.4%0.682%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets27,328$0.78M0.0%-6.7%0.024%Search for SEC Filing on Google Icon
11/13/2025Franklin Resources Inc.405,825$11.54M0.0%+21.4%0.360%Search for SEC Filing on Google Icon
11/13/2025Capital World Investors9,822,711$279.36M0.0%+17.1%8.721%Search for SEC Filing on Google Icon
11/13/2025Legal & General Group Plc45,738$1.30M0.0%+3.4%0.041%Search for SEC Filing on Google Icon
11/13/2025Swiss National Bank87,100$2.48M0.0%+3.8%0.077%Search for SEC Filing on Google Icon
11/13/2025Jefferies Financial Group Inc.12,000$0.34M0.0%N/A0.011%Search for SEC Filing on Google Icon
11/12/2025DCF Advisers LLC175,250$4.98M1.6%+1.6%0.156%Search for SEC Filing on Google Icon
11/12/2025Legato Capital Management LLC23,370$0.67M0.1%+24.4%0.021%Search for SEC Filing on Google Icon
11/12/2025American Century Companies Inc.624,285$17.76M0.0%+17.1%0.554%Search for SEC Filing on Google Icon
11/12/2025Handelsbanken Fonder AB405,800$11.54M0.0%+18.8%0.360%Search for SEC Filing on Google Icon
11/12/2025Mesirow Financial Investment Management Inc.8,215$0.23M0.0%N/A0.007%Search for SEC Filing on Google Icon
11/10/2025TD Asset Management Inc18,000$0.51M0.0%N/A0.016%Search for SEC Filing on Google Icon
11/10/2025China Universal Asset Management Co. Ltd.19,742$0.56M0.0%-12.4%0.018%Search for SEC Filing on Google Icon
11/7/2025CenterBook Partners LP70,613$2.01M0.1%+3.6%0.063%Search for SEC Filing on Google Icon
11/7/2025Readystate Asset Management LP34,353$0.98M0.0%-85.1%0.031%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.172,466$4.91M0.0%-3.6%0.153%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.1,302,498$37.04M0.0%-10.7%1.156%Search for SEC Filing on Google Icon
11/7/2025PNC Financial Services Group Inc.3,616$0.10M0.0%-21.3%0.003%Search for SEC Filing on Google Icon
11/7/2025TimesSquare Capital Management LLC837,368$23.82M0.3%-4.0%0.743%Search for SEC Filing on Google Icon
11/7/2025Aberdeen Group plc661,946$18.83M0.0%-9.9%0.588%Search for SEC Filing on Google Icon
11/4/2025Marshall Financial Group Inc. ADV7,500$0.21M0.1%N/A0.007%Search for SEC Filing on Google Icon
11/4/2025Atle Fund Management AB193,625$5.51M2.2%+23.2%0.172%Search for SEC Filing on Google Icon
11/4/2025Keybank National Association OH16,014$0.46M0.0%N/A0.014%Search for SEC Filing on Google Icon
11/4/2025Lisanti Capital Growth LLC47,445$1.35M0.3%-3.4%0.042%Search for SEC Filing on Google Icon
11/3/2025Arizona State Retirement System13,251$0.38M0.0%+3.8%0.012%Search for SEC Filing on Google Icon
11/3/2025Knights of Columbus Asset Advisors LLC33,610$0.96M0.1%+2.4%0.030%Search for SEC Filing on Google Icon
11/3/2025New York State Common Retirement Fund26,680$0.76M0.0%N/A0.024%Search for SEC Filing on Google Icon
10/30/2025Jennison Associates LLC4,198,554$119.41M0.1%+42.5%3.728%Search for SEC Filing on Google Icon
10/28/2025Wolverine Asset Management LLC2,429$69K0.0%N/A0.002%Search for SEC Filing on Google Icon
10/21/2025Mather Group LLC.1,000$28K0.0%N/A0.001%Search for SEC Filing on Google Icon
10/9/2025Voya Investment Management LLC19,300$0.55M0.0%N/A0.017%Search for SEC Filing on Google Icon
10/7/2025Thurston Springer Miller Herd & Titak Inc.1,067$30K0.1%N/A0.001%Search for SEC Filing on Google Icon
8/28/2025China Universal Asset Management Co. Ltd.22,549$0.41M0.0%+2.4%0.020%Search for SEC Filing on Google Icon
8/15/2025Duquesne Family Office LLC832,175$15.07M0.4%+4.0%0.741%Search for SEC Filing on Google Icon
8/15/2025Exome Asset Management LLC36,574$0.66M0.4%N/A0.033%Search for SEC Filing on Google Icon
8/15/2025Frazier Life Sciences Management L.P.16,607,074$300.75M12.0%+3.0%14.792%Search for SEC Filing on Google Icon
8/15/2025BNP Paribas Financial Markets29,277$0.53M0.0%+4.5%0.026%Search for SEC Filing on Google Icon
8/15/2025Boothbay Fund Management LLC60,054$1.09M0.0%-53.4%0.053%Search for SEC Filing on Google Icon
8/15/2025Bellevue Group AG20,555$0.37M0.0%-5.7%0.018%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE484,004$8.77M0.0%-26.6%0.431%Search for SEC Filing on Google Icon
8/15/2025Adage Capital Partners GP L.L.C.3,013,009$54.57M0.1%+54.5%2.684%Search for SEC Filing on Google Icon
8/15/2025Ameriprise Financial Inc.208,081$3.77M0.0%+118.7%0.185%Search for SEC Filing on Google Icon
8/14/2025California State Teachers Retirement System47,862$0.87M0.0%+146.7%0.043%Search for SEC Filing on Google Icon
8/14/2025Maverick Capital Ltd.1,531,874$27.74M0.4%+178.8%1.364%Search for SEC Filing on Google Icon
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.31,383$0.57M0.0%+5.4%0.028%Search for SEC Filing on Google Icon
8/14/2025Alliancebernstein L.P.2,331,583$42.23M0.0%+4.0%2.077%Search for SEC Filing on Google Icon
8/14/2025The Manufacturers Life Insurance Company 10,868$0.20M0.0%+5.3%0.010%Search for SEC Filing on Google Icon
8/14/2025HighVista Strategies LLC19,274$0.35M0.1%N/A0.017%Search for SEC Filing on Google Icon
8/14/2025Stempoint Capital LP152,652$2.77M0.9%+46.0%0.136%Search for SEC Filing on Google Icon
8/14/2025AXA S.A.242,916$4.40M0.0%+0.2%0.216%Search for SEC Filing on Google Icon
8/13/2025Affinity Asset Advisors LLC275,000$4.98M0.7%-21.4%0.245%Search for SEC Filing on Google Icon
8/13/2025First Trust Advisors LP131,430$2.38M0.0%+10.4%0.117%Search for SEC Filing on Google Icon
8/13/2025Kennedy Capital Management LLC13,675$0.25M0.0%N/A0.012%Search for SEC Filing on Google Icon
8/13/2025Saturn V Capital Management LP220,695$4M1.6%+89.7%0.197%Search for SEC Filing on Google Icon
8/13/2025Invesco Ltd.134,035$2.43M0.0%+12.7%0.119%Search for SEC Filing on Google Icon
8/13/2025Virtus Investment Advisers LLC4,471$81K0.0%-31.7%0.004%Search for SEC Filing on Google Icon
8/12/2025American Century Companies Inc.532,916$9.65M0.0%+0.8%0.475%Search for SEC Filing on Google Icon
8/12/2025Franklin Resources Inc.334,212$6.05M0.0%+30.6%0.298%Search for SEC Filing on Google Icon
8/12/2025Legal & General Group Plc44,235$0.80M0.0%+33.5%0.039%Search for SEC Filing on Google Icon
8/12/2025JPMorgan Chase & Co.1,458,897$26.42M0.0%+47.2%1.299%Search for SEC Filing on Google Icon
8/12/2025Swiss National Bank83,900$1.52M0.0%+18.3%0.075%Search for SEC Filing on Google Icon
8/12/2025Handelsbanken Fonder AB341,600$6.19M0.0%+31.4%0.304%Search for SEC Filing on Google Icon
8/8/2025Letko Brosseau & Associates Inc.11,775$0.21M0.0%N/A0.010%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC99,457$1.80M0.0%+15.9%0.089%Search for SEC Filing on Google Icon
8/8/2025TimesSquare Capital Management LLC872,537$15.80M0.2%-2.1%0.777%Search for SEC Filing on Google Icon
8/5/2025Bank of New York Mellon Corp352,952$6.39M0.0%N/A0.314%Search for SEC Filing on Google Icon
8/1/2025Jennison Associates LLC2,946,103$53.35M0.0%-25.8%2.624%Search for SEC Filing on Google Icon
8/1/2025Teacher Retirement System of Texas11,700$0.21M0.0%N/A0.010%Search for SEC Filing on Google Icon
7/24/2025Aberdeen Group plc735,032$13.31M0.0%+95.0%0.655%Search for SEC Filing on Google Icon
7/23/2025KLP Kapitalforvaltning AS9,100$0.17M0.0%+51.7%0.008%Search for SEC Filing on Google Icon
7/22/2025Knights of Columbus Asset Advisors LLC32,833$0.60M0.0%N/A0.029%Search for SEC Filing on Google Icon
7/21/2025Mirae Asset Global Investments Co. Ltd.4,337$79K0.0%+18.0%0.004%Search for SEC Filing on Google Icon
7/14/2025Avanza Fonder AB7,505$0.14M0.0%+21.0%0.007%Search for SEC Filing on Google Icon
7/14/2025Atle Fund Management AB157,223$2.85M1.2%+45.9%0.140%Search for SEC Filing on Google Icon
7/8/2025PTM Wealth Management LLC12,900$0.26M0.2%N/A0.011%Search for SEC Filing on Google Icon
5/19/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC288,134$5.90M0.0%+13.6%0.262%Search for SEC Filing on Google Icon
5/16/2025Woodline Partners LP2,442,397$50M0.3%+0.5%2.224%Search for SEC Filing on Google Icon
5/16/2025Fred Alger Management LLC27,421$0.56M0.0%-66.0%0.025%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
NewAmsterdam Pharma logo
NewAmsterdam Pharma Company N.V., a late-stage biopharmaceutical company, develops therapies to enhance patient care in populations with metabolic disease. It is developing obicetrapib, an oral low-dose cholesteryl ester transfer protein (CETP) inhibitor, that is in various clinical trials as a monotherapy and a combination therapy with ezetimibe for lowering LDL-C for cardiovascular diseases. The company also develops Obicetrapib which is in Phase 2a clinical trial for Alzheimer's disease. NewAmsterdam Pharma Company N.V. is headquartered in Naarden, the Netherlands.
Read More on NewAmsterdam Pharma

Today's Range

Now: $35.85
Low: $34.99
High: $36.60

50 Day Range

MA: $36.39
Low: $27.52
High: $41.45

52 Week Range

Now: $35.85
Low: $14.06
High: $42.00

Volume

1,788,591 shs

Average Volume

1,012,409 shs

Market Capitalization

$4.07 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.05

Who are the company insiders with the largest holdings of NewAmsterdam Pharma?

NewAmsterdam Pharma's top insider shareholders include:
  1. Nap BV Forgrowth (Major Shareholder)
  2. James N Topper (Director)
  3. Michael H Davidson (CEO)
  4. Johannes Jacob Piete Kastelein (Insider)
  5. Douglas F Kling (COO)
  6. Louis G Lange (Director)
  7. Louise Frederika Kooij (CAO)
  8. Juliette Berangere Audet (Insider)
Learn More about top insider investors at NewAmsterdam Pharma.

Who are the major institutional investors of NewAmsterdam Pharma?

NewAmsterdam Pharma's top institutional shareholders include:
  1. Capital World Investors — 8.72%
  2. Fcpm Iii Services B.V. — 8.12%
  3. Viking Global Investors LP — 5.71%
  4. Deerfield Management Company L.P. — 3.79%
  5. Jennison Associates LLC — 3.73%
  6. Wellington Management Group LLP — 3.57%
Learn More about top institutional investors of NewAmsterdam Pharma stock.

Which institutional investors are selling NewAmsterdam Pharma stock?

In the previous quarter, NAMS stock was sold by these institutional investors:
  1. Fcpm Iii Services B.V.
  2. Deerfield Management Company L.P.
  3. Woodline Partners LP
  4. Viking Global Investors LP
  5. Readystate Asset Management LP
  6. Alliancebernstein L.P.
  7. JPMorgan Chase & Co.
  8. Decheng Capital LLC
In the last year, company insiders that have sold NewAmsterdam Pharma company stock include:
  1. Nap BV Forgrowth (Major Shareholder)
  2. James N Topper (Director)
  3. Michael H Davidson (CEO)
  4. Johannes Jacob Piete Kastelein (Insider)
Learn More investors selling NewAmsterdam Pharma stock.

Which institutional investors are buying NewAmsterdam Pharma stock?

Within the previous quarter, NAMS stock was bought by institutional investors including:
  1. Capital World Investors
  2. Jennison Associates LLC
  3. Caption Management LLC
  4. Duquesne Family Office LLC
  5. Integral Health Asset Management LLC
  6. Wellington Management Group LLP
  7. Polar Capital Holdings Plc
  8. UBS Group AG
Within the last year, these company insiders have bought NewAmsterdam Pharma stock:
  1. Nap BV Forgrowth (Major Shareholder)
  2. James N Topper (Director)
  3. Michael H Davidson (CEO)
  4. Johannes Jacob Piete Kastelein (Insider)
Learn More investors buying NewAmsterdam Pharma stock.