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Acumen Pharmaceuticals Ownership | Who Owns Acumen Pharmaceuticals?

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Acumen Pharmaceuticals Ownership Summary

Acumen Pharmaceuticals is owned by 24.68% institutional investors, 7.46% insiders, and 67.85% retail investors. Ra capital management is the largest institutional shareholder, holding 24.65% of ABOS shares. Franklin Biotechnology Discv A(acc)USD is the top mutual fund, with 2.44% of its assets in Acumen Pharmaceuticals shares.

ABOS Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockAcumen Pharmaceuticals24.68%7.46%67.85%
SectorHealthcare Stocks 232.63%10.66%-143.29%
IndustryBiotech Stocks 382.12%10.42%-292.54%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Ra capital management14.93M24.65%$25.53M
Sands capital ventures3.42M5.64%$5.84M
Franklin resources2.31M3.81%$4.86M
Blackrock2.16M3.61%$5.22M
Fmr2.03M3.35%$3.47M
Vanguard group1.65M2.73%$3.49M
Knollwood investment advisory1.63M2.69%$2.78M
Millennium management1.14M1.88%$1.25M
Alyeska investment group939.60K1.55%$1.61M
Adar1 capital management891.18K1.47%$1.52M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Sands capital ventures3.42M1.28%$5.84M
Ra capital management14.93M0.31%$25.53M
Knollwood investment advisory1.63M0.25%$2.78M
Adar1 capital management891.18K0.14%$1.52M
Ikarian capital265.77K0.05%$454.46K
Laurion capital management lp867.05K0.03%$1.48M
Catalyst financial partners89.70K0.02%$189.26K
Intrepid financial planning group30.15K0.02%$51.56K
Catalyst funds management pty29.60K0.01%$62.46K
Clune & associates16.50K0.01%$34.81K

Top Buyers

HolderShares% AssetsChange
Blackrock2.16M0.00%1.97M
Bridgeway capital management190.17K0.01%75.00K
Acadian asset management152.78K0.00%74.86K
D. e. shaw55.01K0.00%55.01K
Prospera financial services50.00K0.00%50.00K

Top Sellers

HolderShares% AssetsChange
Rock springs capital management lp---1.84M
Parkman healthcare partners---576.66K
Y-intercept (hong kong)---250.85K
Tang capital management---246.90K
Millennium management1.14M0.00%-209.52K

New Positions

HolderShares% AssetsChangeValue
Prospera financial services50.00K0.00%50.00K$105.50K
Cubist systematic strategies23.90K0.00%23.90K$40.88K
Independent advisor alliance19.00K0.00%19.00K$40.09K
Nine masts capital10.64K0.00%10.64K$22.44K
Rockefeller capital management3.00K-3.00K$5.13K

Sold Out

HolderChange
True wealth design-35.00
Capital performance advisors llp-52.00
Citigroup-151.00
Russell investments group-278.00
Coldstream capital management-311.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Dec 31, 202547-32.86%14,951,519-58.16%240.71%15-34.78%11-59.26%
Sep 30, 202565-9.72%33,908,640-9.82%551.45%20-35.48%2712.50%
Jun 30, 202572-13.25%37,610,957-6.52%621.41%3119.23%24-29.41%
Mar 31, 20255-93.83%16,490,041-61.19%270.54%1-97.50%2-90.00%
Dec 31, 2024815.19%42,494,401-2.55%701.34%4017.65%20-4.76%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Franklin Biotechnology Discv A(acc)USD1.48M2.44%-
Fidelity Select Health Care1.14M1.88%-
Vanguard Total Stock Mkt Idx Inv1.12M1.85%-
iShares Russell 2000 ETF971.80K1.60%-
Franklin Biotechnology Discovery A826.40K1.36%-
Franklin US Small Cap Growth Equity771.94K1.27%3.97K
Franklin Small Cap Growth SMA771.94K1.27%771.94K
Franklin Small Cap Growth Adv708.38K1.17%-59.59K
Fidelity Advisor Health Care I700.00K1.16%-
Fidelity Small Cap Index408.40K0.67%-

Recent Insider Transactions

DateNameRoleActivityValue
Mar 06, 2026Meisner Derek M Chief Legal Officer & Corp SecSell$6.81K
Feb 27, 2026Meisner Derek M Chief Legal Officer & Corp SecSell$28.31K
Jan 26, 2026Meisner Derek M Chief Legal Officer & Corp SecSell$45.26K
Jan 28, 2026Meisner Derek M Chief Legal Officer & Corp SecSell$8.02K
Jan 23, 2026Meisner Derek M Chief Legal Officer & Corp SecSell$10.72K

Insider Transactions Trends

DateBuySell
2026 Q1-44
2025 Q4--
2025 Q2--
2025 Q1-11
2024 Q4--

ABOS Ownership FAQ

Who Owns Acumen Pharmaceuticals?

Acumen Pharmaceuticals shareholders are primarily institutional investors at 24.68%, followed by 7.46% insiders and 67.86% retail investors. The average institutional ownership in Acumen Pharmaceuticals's industry, Biotech Stocks , is 382.12%, which Acumen Pharmaceuticals falls below.

Who owns the most shares of Acumen Pharmaceuticals?

Acumen Pharmaceuticals’s largest shareholders are Ra capital management (14.93M shares, 24.65%), Sands capital ventures (3.42M shares, 5.64%), and Franklin resources (2.31M shares, 3.81%). Together, they hold 34.10% of Acumen Pharmaceuticals’s total shares outstanding.

Does Blackrock own Acumen Pharmaceuticals?

Yes, BlackRock owns 3.61% of Acumen Pharmaceuticals, totaling 2.16M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 5.22M$. In the last quarter, BlackRock increased its holdings by 1.97M shares, a 1037.95% change.

Who is Acumen Pharmaceuticals’s biggest shareholder by percentage of total assets invested?

Sands capital ventures is Acumen Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 1.28% of its assets in 3.42M Acumen Pharmaceuticals shares, valued at 5.84M$.

Who is the top mutual fund holder of Acumen Pharmaceuticals shares?

Franklin Biotechnology Discv A(acc)USD is the top mutual fund holder of Acumen Pharmaceuticals shares, with 2.44% of its total shares outstanding invested in 1.48M Acumen Pharmaceuticals shares.

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