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Mersana Therapeutics (MRSN) Institutional Ownership

Mersana Therapeutics logo
$6.61 -0.09 (-1.34%)
Closing price 08/7/2025 04:00 PM Eastern
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$6.57 -0.04 (-0.54%)
As of 08/7/2025 05:41 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Institutional Ownership Changes (13F Filings) for Mersana Therapeutics (NASDAQ:MRSN)

Current
Institutional Ownership
Percentage
93.92%
Number of
Institutional Buyers
(last 12 months)
54
Total
Institutional Inflows
(last 12 months)
$735.27M
Number of
Institutional Sellers
(last 12 months)
24
Total
Institutional Outflows
(last 12 months)
$195.10M
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Skip Chart & View Institutional Buying and Selling Data

MRSN Institutional Buying and Selling by Quarter

Mersana Therapeutics Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
6/27/2025Goldman Sachs Group Inc.586,658$202K0.0%-26.9%0.471%
5/21/2025Acadian Asset Management LLC2,989,659$1.03M0.0%N/A2.399%
5/16/2025Goldman Sachs Group Inc.586,658$202K0.0%-26.9%0.471%
5/16/2025Jacobs Levy Equity Management Inc.1,333,124$459K0.0%+19.9%1.070%
5/16/2025AQR Capital Management LLC5,143,749$1.77M0.0%N/A4.127%
5/16/2025683 Capital Management LLC1,650,000$568K0.0%+83.3%1.324%
5/15/2025Alamea Verwaltungs GmbH604,213$208K0.2%N/A0.485%
5/15/2025State of Wyoming295,498$102K0.0%N/A0.237%
5/14/2025Ieq Capital LLC707,021$243K0.0%N/A0.567%
5/13/2025Algert Global LLC135,013$46K0.0%+124.7%0.108%
5/12/2025Nuveen LLC232,223$80K0.0%N/A0.186%
5/12/2025Invesco Ltd.114,863$40K0.0%+109.3%0.092%
5/9/2025Charles Schwab Investment Management Inc.280,631$97K0.0%-10.2%0.225%
5/1/2025 CWM LLC184,825$64K0.0%+102,580.6%0.148%
4/30/2025Cerity Partners LLC244,235$84K0.0%N/A0.196%
4/16/2025 Wealth Enhancement Advisory Services LLC130,700$45K0.0%N/A0.105%
4/14/2025 Pallas Capital Advisors LLC94,531$33K0.0%N/A0.076%
3/24/2025Wellington Management Group LLP576,148$824K0.0%-6.8%0.462%
2/20/2025Mackenzie Financial Corp91,956$131K0.0%N/A0.074%
2/17/2025VR Adviser LLC10,257,790$14.67M1.0%-9.4%8.304%
2/17/2025Two Sigma Investments LP210,876$302K0.0%-29.8%0.171%
2/17/2025Two Sigma Advisers LP448,000$641K0.0%-8.0%0.363%
2/17/2025Sphera Funds Management LTD.690,272$987K0.2%N/A0.559%
2/17/2025Nuveen Asset Management LLC232,223$332K0.0%+53.6%0.188%
2/17/2025OCONNOR A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS LLC410,029$586K0.0%-28.1%0.332%
2/17/2025Millennium Management LLC795,973$1.14M0.0%+206.4%0.644%
2/17/2025Jacobs Levy Equity Management Inc.1,111,998$1.59M0.0%+12.0%0.900%
2/17/2025D. E. Shaw & Co. Inc.544,463$779K0.0%-46.7%0.441%
2/17/2025Deutsche Bank AG839,724$1.20M0.0%-47.4%0.680%
2/17/2025Cubist Systematic Strategies LLC45,296$65K0.0%N/A0.037%
2/17/2025Bank of America Corp DE953,952$1.36M0.0%-3.6%0.772%
2/17/2025BNP Paribas Financial Markets361,147$516K0.0%+52.3%0.292%
2/17/2025683 Capital Management LLC900,000$1.29M0.1%+392.4%0.729%
2/17/2025Acuta Capital Partners LLC1,120,500$1.60M1.6%-6.6%0.907%
2/14/2025Boxer Capital Management LLC2,635,000$3.77M0.3%N/A2.133%
2/14/2025Novo Holdings A S4,250,000$6.08M0.4%N/A3.440%
2/14/2025Schonfeld Strategic Advisors LLC2,119,586$3.03M0.0%-4.7%1.716%
2/14/2025Oxford Asset Management LLP65,386$94K0.0%N/A0.053%
2/14/2025Susquehanna Fundamental Investments LLC91,852$131K0.0%N/A0.074%
2/14/2025Price T Rowe Associates Inc. MD62,093$89K0.0%-37.3%0.050%
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2/14/2025Rock Springs Capital Management LP3,431,684$4.91M0.2%+12.6%2.778%
2/14/2025MetLife Investment Management LLC73,150$105K0.0%+115.7%0.059%
2/13/2025XTX Topco Ltd63,530$91K0.0%-81.7%0.051%
2/13/2025Barclays PLC182,711$262K0.0%-63.1%0.148%
2/13/2025Renaissance Technologies LLC606,285$867K0.0%+23.0%0.491%
2/13/2025Wells Fargo & Company MN67,483$97K0.0%+40.3%0.055%
2/12/2025ExodusPoint Capital Management LP194,153$278K0.0%N/A0.157%
2/12/2025Geode Capital Management LLC2,442,250$3.49M0.0%+1.2%1.977%
2/12/2025Wellington Management Group LLP576,148$824K0.0%-6.8%0.466%
2/11/2025Sei Investments Co.69,527$99K0.0%N/A0.056%
2/4/2025Los Angeles Capital Management LLC159,760$228K0.0%-15.8%0.129%
2/4/2025 Bank of New York Mellon Corp346,189$495K0.0%-7.0%0.280%
1/24/2025China Universal Asset Management Co. Ltd.26,194$37K0.0%N/A0.021%
1/17/2025SG Americas Securities LLC112,291$161K0.0%+28.7%0.091%
1/15/2025 Avanza Fonder AB56,298$81K0.0%N/A0.046%
12/26/2024JPMorgan Chase & Co.2,351,359$4.44M0.0%+18.9%1.903%
12/13/2024Exome Asset Management LLC1,178,570$2.23M1.5%N/A0.954%
11/19/2024Barclays PLC494,516$934K0.0%+32.7%0.400%
11/16/2024Geode Capital Management LLC2,413,215$4.56M0.0%-3.2%1.967%
11/15/2024Barclays PLC494,516$934K0.0%+32.7%0.403%
11/15/2024XTX Topco Ltd347,255$656K0.0%+186.0%0.283%
11/15/2024Wellington Management Group LLP618,305$1.17M0.0%+16.0%0.504%
11/15/2024State Street Corp2,725,394$5.15M0.0%+1.6%2.222%
11/15/2024Quarry LP30,000$57K0.0%N/A0.024%
11/15/2024Jacobs Levy Equity Management Inc.993,046$1.88M0.0%+104.5%0.809%
11/15/2024Atom Investors LP24,661$47K0.0%-93.3%0.020%
11/14/2024Verition Fund Management LLC1,303,249$2.46M0.0%+11,695.2%1.062%
11/14/2024Acuta Capital Partners LLC1,200,000$2.27M1.8%-27.8%0.978%
11/14/2024MetLife Investment Management LLC33,916$64K0.0%-48.3%0.028%
11/13/2024BNP Paribas Financial Markets237,198$448K0.0%-29.4%0.193%
11/13/2024FMR LLC277,740$525K0.0%+13.2%0.226%
11/13/2024Dynamic Technology Lab Private Ltd18,095$34K0.0%N/A0.015%
11/12/2024 HealthInvest Partners AB538,621$1.02M0.5%+191.3%0.439%
11/9/2024Intech Investment Management LLC27,342$52K0.0%N/A0.022%
11/5/2024 GSA Capital Partners LLP271,774$514K0.0%+368.9%0.222%
11/4/2024Los Angeles Capital Management LLC189,660$358K0.0%+8.1%0.155%
10/28/2024 US Bancorp DE16,178$31K0.0%N/A0.013%
10/10/2024 Exchange Traded Concepts LLC85,006$161K0.0%+95.8%0.069%
10/3/2024SG Americas Securities LLC87,233$165K0.0%-37.1%0.071%
8/16/2024Algert Global LLC44,655$90K0.0%N/A0.036%
8/15/2024Susquehanna Fundamental Investments LLC308,691$620K0.0%+31.9%0.252%
8/15/2024Affinity Asset Advisors LLC767,000$1.54M0.2%-23.3%0.627%
8/14/2024Squarepoint Ops LLC252,804$508K0.0%N/A0.207%
8/14/2024Marshall Wace LLP176,029$354K0.0%+358.0%0.144%
8/12/2024XTX Topco Ltd121,432$244K0.0%+262.1%0.099%
8/9/2024Renaissance Technologies LLC1,448,219$2.91M0.0%+1.4%1.184%
8/9/2024Dimensional Fund Advisors LP13,703$28K0.0%-56.1%0.011%
8/8/2024Federated Hermes Inc.185,507$373K0.0%+105,301.7%0.152%
8/7/2024ClariVest Asset Management LLC500,498$1.01M0.1%+6.1%0.409%
8/6/2024Acadian Asset Management LLC71,506$143K0.0%-84.8%0.058%
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8/6/2024Los Angeles Capital Management LLC175,420$353K0.0%-11.0%0.143%
7/29/2024Principal Financial Group Inc.18,278$37K0.0%-42.5%0.015%
7/26/2024 Bank of New York Mellon Corp452,829$910K0.0%+19.6%0.370%
7/12/2024SG Americas Securities LLC138,722$279K0.0%+313.9%0.113%
5/17/2024Walleye Trading LLC31,526$141K0.0%N/A0.026%
5/16/2024California State Teachers Retirement System11,145$50K0.0%-38.9%0.009%
5/16/2024Jacobs Levy Equity Management Inc.809,879$3.63M0.0%-13.0%0.662%
5/15/2024Price T Rowe Associates Inc. MD79,932$359K0.0%+6.6%0.065%
5/10/2024Acadian Asset Management LLC468,923$2.10M0.0%+166.7%0.387%
5/10/2024Vanguard Group Inc.6,274,370$28.11M0.0%+0.6%5.172%
(Data available from 1/1/2016 forward)

MRSN Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of MRSN shares?

During the previous two years, 96 institutional investors and hedge funds held shares of Mersana Therapeutics. The most heavily invested institutionals were Vanguard Group Inc. ($28.11M), Bellevue Group AG ($17.17M), VR Adviser LLC ($14.67M), Artal Group S.A. ($9.97M), Candriam S.C.A. ($7.95M), Novo Holdings A S ($6.08M), and State Street Corp ($5.15M).Learn more on Mersana Therapeutics' institutional investors.

What percentage of Mersana Therapeutics' stock is owned by institutional investors?

93.92% of Mersana Therapeutics' stock is owned by institutional investors. Learn more on MRSN's institutional investor holdings.

Which institutional investors have been buying Mersana Therapeutics' stock?

Of the 78 institutional investors that purchased Mersana Therapeutics' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: AQR Capital Management LLC ($5.14M), Novo Holdings A S ($4.25M), Acadian Asset Management LLC ($3.64M), Affinity Asset Advisors LLC ($2.85M), Boxer Capital Management LLC ($2.64M), Walleye Capital LLC ($1.87M), and 683 Capital Management LLC ($1.47M).

How much institutional buying is happening at Mersana Therapeutics?

Institutional investors have bought a total of 27,453,051 shares in the last 24 months. This purchase volume represents approximately $725.96M in transactions.

Which of Mersana Therapeutics' major shareholders have been selling company stock?

Of the 24 institutional investors that sold Mersana Therapeutics' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: VR Adviser LLC ($1.07M), Deutsche Bank AG ($756.45K), Acuta Capital Partners LLC ($542.50K), D. E. Shaw & Co. Inc. ($477.99K), Goldman Sachs Group Inc. ($431.42K), Atom Investors LP ($340.77K), and Barclays PLC ($311.81K).

How much institutional selling is happening at Mersana Therapeutics?

Institutional investors have sold a total of 5,364,783 shares in the last 24 months. This volume of shares sold represents approximately $195.10M in transactions.


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This page (NASDAQ:MRSN) was last updated on 8/8/2025 by MarketBeat.com Staff
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