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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.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Acumen Pharmaceuticals, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Acumen Pharmaceuticals, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Acumen Pharmaceuticals, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Porter DerrellDirector35,500Jun 17, 20262
Fountain Nathan BDirector48,150Jun 10, 20262
RA Capital Healthcare Fund LPDirector, 10% Owner48,300IndirectJun 5, 20262
Ra Capital Management, L.P.Director, 10% Owner48,300IndirectJun 5, 20262
Kolchinsky PeterDirector, 10% Owner48,300IndirectJun 5, 20262
Shah Rajeev M.Director, 10% Owner48,300IndirectJun 5, 20262
RA Capital Nexus Fund II, L.P.Director48,300IndirectJun 5, 20262
Drapkin Kimberlee CDirector48,300Jun 5, 20261
Golumbeski GeorgeDirector35,500Jun 5, 20262
Ives Jeffrey L.Director48,300Jun 5, 20261
Stalfort John A IIIDirector220,624Jun 5, 20261
Stoppel LauraDirector48,300Jun 5, 20261
Meisner Derek MChief Legal Officer & Corp Sec173,999Mar 10, 20267
Zuga MattCFO & Chief Business Officer304,924Jan 23, 20264
OConnell Daniel JosephChief Executive Officer881,275Jan 23, 20264
Siemers EricChief Medical Officer255,371Jan 23, 20263
Barton RussellChief Operating Officer205,092Jan 23, 20264
Doherty James J.President and CDO220,900Jan 21, 20262
Schacterle AmyChief Regulatory Officer92,303Jan 21, 20262
Sevigny JeffreyDirector–Jun 17, 20220
Sands Capital Life Sciences Pulse Fund, LLC10% Owner3,417,075Jul 8, 20210
Sands Capital Ventures Discovery Fund III, L.P.10% Owner3,417,075Jul 8, 20210
Sands Capital Global Venture Fund II, L.P.10% Owner3,417,075Jul 8, 20210
Sands Frank M.10% Owner3,417,075Jul 8, 20210
Manning Paul B10% Owner657,985IndirectJul 8, 20210
Hardie Robert D.10% Owner657,985IndirectJul 8, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

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
Jan 12, 2026 (view filing)Jan 84 daysZuga MattCFO & Chief Business OfficerSSale−6.89K$1.82−$12.5K−3.2%210.0K after
Jan 12, 2026 (view filing)Jan 84 daysBarton RussellChief Operating OfficerSSale−3.53K$1.86−$6.57K−2.8%123.3K after
Jan 12, 2026 (view filing)Jan 8-124 daysMeisner Derek MChief Legal Officer & Corp SecSSale−50.7K$1.80−$90.9K−37.7%83.8K after4 lots
Jan 12, 2026 (view filing)Jan 8-124 daysOConnell Daniel JosephChief Executive OfficerSSale−26.5K$1.77−$46.9K−4.3%593.5K after3 lots
Jan 9, 2026 (view filing)Jan 7-82 daysDoherty James J.President and CDOSSale−8.17K$1.86−$15.2K−13.1%54.0K after2 lots
Jan 9, 2026 (view filing)Jan 72 daysSchacterle AmyChief Regulatory OfficerSSale−1.10K$1.98−$2.17K−12.5%7.70K after
Jan 7, 2026 (view filing)Jan 5-72 daysZuga MattCFO & Chief Business OfficerSSale−14.9K$1.98−$29.5K−6.4%216.8K after4 lots
Jan 7, 2026 (view filing)Jan 5-62 daysSiemers EricChief Medical OfficerSSale−10.8K$1.97−$21.3K−6.4%159.5K after2 lots
Jan 7, 2026 (view filing)Jan 5-72 daysOConnell Daniel JosephChief Executive OfficerSSale−47.5K$1.99−$94.3K−7.1%620.0K after3 lots
Jan 7, 2026 (view filing)Jan 5-72 daysMeisner Derek MChief Legal Officer & Corp SecSSale−26.7K$1.98−$52.7K−16.6%134.5K after5 lots
Jan 7, 2026 (view filing)Jan 5-72 daysBarton RussellChief Operating OfficerSSale−9.32K$1.97−$18.4K−6.8%126.8K after3 lots
Jan 23, 2025 (view filing)Jan 21-232 daysZuga MattCFO & Chief Business OfficerSSale−33.3K$1.70−$56.7K−12.6%231.7K after2 lots10b5-1
Jan 23, 2025 (view filing)Jan 212 daysOConnell Daniel JosephChief Executive OfficerSSale−12.6K$1.59−$20.1K−1.9%667.5K after10b5-1
Jan 23, 2025 (view filing)Jan 212 daysMeisner Derek MChief Legal Officer & Corp SecSSale−3.42K$1.59−$5.43K−2.1%161.1K after10b5-1
Jan 23, 2025 (view filing)Jan 212 daysBarton RussellChief Operating OfficerSSale−2.91K$1.61−$4.69K−2.1%136.1K after10b5-1
Jan 23, 2025 (view filing)Jan 212 daysSiemers EricChief Medical OfficerSSale−3.22K$1.59−$5.12K−1.9%170.3K after10b5-1
Jan 7, 2025 (view filing)Jan 34 daysOConnell Daniel JosephChief Executive OfficerSSale−47.8K$1.84−$87.9K−9.5%454.7K after10b5-1
Jan 7, 2025 (view filing)Jan 34 daysMeisner Derek MChief Legal Officer & Corp SecSSale−11.1K$1.84−$20.5K−10.2%97.7K after10b5-1
Jan 7, 2025 (view filing)Jan 34 daysBarton RussellChief Operating OfficerSSale−7.64K$1.86−$14.2K−7.9%89.2K after10b5-1
Jan 7, 2025 (view filing)Jan 34 daysZuga MattCFO & Chief Business OfficerSSale−13.2K$1.84−$24.4K−6.3%198.2K after10b5-1
Jan 7, 2025 (view filing)Jan 34 daysSiemers EricChief Medical OfficerSSale−10.9K$1.85−$20.1K−9.2%106.7K after10b5-1
Jan 19, 2024 (view filing)Jan 19Same dayOConnell Daniel JosephPresident and CEOSSale−15.2K$3.47−$52.7K−2.9%502.5K after10b5-1
Jan 19, 2024 (view filing)Jan 19Same dayMeisner Derek MChief Legal Officer & Corp SecSSale−8.93K$3.48−$31.1K−7.6%108.9K after10b5-1
Jan 19, 2024 (view filing)Jan 181 dayZuga MattCFO & Chief Business OfficerSSale−4.24K$3.71−$15.7K−2.0%211.4K after10b5-1
Jan 19, 2024 (view filing)Jan 181 daySiemers EricChief Medical OfficerSSale−3.12K$3.71−$11.6K−2.6%117.6K after10b5-1
Jan 19, 2024 (view filing)Jan 181 dayBarton RussellChief Operating OfficerSSale−2.83K$3.73−$10.6K−2.8%96.9K after10b5-1
Aug 18, 2023 (view filing)Aug 171 dayIves Jeffrey L.DirectorSSale−41.9K$6.49−$272.3K−100.0%0 after2 lots10b5-1
Jul 25, 2023 (view filing)4:30 PM ETJul 214 daysRA Capital Healthcare Fund LP and 4 othersDirector, 10% OwnerPPurchase+5.16M$7.75+$40.0M+65.5%13.0M after
Jul 8, 2021 (view filing)5:21 PM ETJul 62 daysSands Capital Life Sciences Pulse Fund, LLC and 3 others10% OwnerPPurchase+450.0K$14.88+$6.70M+15.2%3.42M after
Jul 8, 2021 (view filing)4:32 PM ETJul 62 daysRA Capital Healthcare Fund LP and 4 othersDirector, 10% OwnerPPurchase+1.88M$16.00+$30.0MNew position1.30M after2 lots
Jul 8, 2021 (view filing)Jul 62 daysManning Paul B10% OwnerPPurchase+312.5K$16.00+$5.00M+10.3%3.35M afterDuplicate filing
Jul 8, 2021 (view filing)Jul 62 daysStalfort John A IIIDirectorPPurchase+35.0K$16.00+$560.0K+25.5%172.3K after
Jul 8, 2021 (view filing)Jul 62 daysHardie Robert D.10% OwnerPPurchase+312.5K$16.00+$5.00M+10.3%3.35M after
Jul 8, 2021 (view filing)Jul 62 daysHardie Robert D.10% OwnerPPurchase+750.0K$16.00+$12.0M+23.4%3.95M after
Jul 8, 2021 (view filing)Jul 62 daysFountain Nathan BDirectorPPurchase+6.25K$16.00+$100.0KNew position6.25K after