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Acumen Pharmaceuticals, Inc.

ABOS
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001576885

No open-market purchases or sales by Acumen Pharmaceuticals, Inc. insiders were filed in the last 90 days; 96 institutions reported holding it in 13F filings for Q2 2026, worth $127.8M in total; no superinvestor holds it.

Key figures

Insider buysOpen market, last 90 days
0
Insider sellsOpen market, last 90 days
0
13F holdersQ2 2026, +13 vs. previous quarter
96
13F valueReported value at the end of Q2 2026
$127.8M
Superinvestors holdingAt the end of Q2 2026
0

Price chart

Superinvestors holding ABOS, Q2 2026

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No superinvestor reported holding ABOS at the end of Q2 2026.

Latest insider trades

Open-market purchases and sales by Acumen Pharmaceuticals, Inc. insiders from Form 4, newest first.

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Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jun 17, 2026 (view filing)Jun 15-172 daysPorter DerrellDirectorSSale−32.3K$2.33−$75.4K−47.6%35.5K after3 lots
Jun 10, 2026 (view filing)Jun 91 dayFountain Nathan BDirectorSSale−6.40K$2.23−$14.3K−11.7%48.1K after
Mar 10, 2026 (view filing)Mar 64 daysMeisner Derek MChief Legal Officer & Corp SecSSale−2.09K$3.26−$6.81K−1.2%174.0K after10b5-1
Mar 3, 2026 (view filing)Feb 274 daysMeisner Derek MChief Legal Officer & Corp SecSSale−9.41K$3.01−$28.3K−5.1%174.0K after10b5-1
Jan 28, 2026 (view filing)Jan 26-282 daysMeisner Derek MChief Legal Officer & Corp SecSSale−17.8K$3.00−$53.3K−9.3%174.0K after2 lots10b5-1
Jan 23, 2026 (view filing)Jan 21-232 daysMeisner Derek MChief Legal Officer & Corp SecSSale−8.93K$1.87−$16.7K−4.9%174.0K after3 lots
Jan 23, 2026 (view filing)Jan 21-222 daysSiemers EricChief Medical OfficerSSale−3.23K$1.81−$5.82K−1.2%255.4K after2 lots
Jan 23, 2026 (view filing)Jan 21-222 daysZuga MattCFO & Chief Business OfficerSSale−4.16K$1.83−$7.61K−1.3%304.9K after2 lots
Jan 23, 2026 (view filing)Jan 21-222 daysOConnell Daniel JosephChief Executive OfficerSSale−12.0K$1.83−$22.0K−1.3%881.3K after2 lots
Jan 23, 2026 (view filing)Jan 21-222 daysBarton RussellChief Operating OfficerSSale−2.78K$1.81−$5.04K−1.3%205.1K after2 lots

Top 10 13F holders, Q2 2026

The largest institutional positions in Acumen Pharmaceuticals, Inc. at the end of Q2 2026; share changes are against Q1 2026.

See all 96 holders
Institutions holding ABOS in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Ra Capital Management, L.P.20,992,669$56.1M0.49%00.0%Unchanged
Sands Capital Ventures, LLC3,720,105$9.93M1.62%00.0%Unchanged
BlackRock, Inc.2,490,115$6.65M0.00%+2,311,789+1,296.4%Added
Alyeska Investment Group, L.P.2,454,754$6.55M0.02%00.0%Unchanged
Franklin Resources Inc2,305,096$6.15M0.00%00.0%Unchanged
ADAR1 Capital Management, LLC2,111,334$5.64M0.26%−45,000−2.1%Reduced
Vanguard Capital Management LLC1,672,072$4.46M0.00%+165,795+11.0%Added
Knollwood Investment Advisory, LLC1,628,510$4.35M0.39%00.0%Unchanged
Geode Capital Management, LLC1,141,858$3.05M0.00%+725,620+174.3%Added
Ikarian Capital, LLC1,053,797$2.81M0.46%00.0%Unchanged