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Acumen Pharmaceuticals, Inc.

ABOS Net buying
CIK 0001576885 #3844 in the set updated 21 Sep 2026
Bought (120 mo)
$99.36M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$1.28M
$380.66K on a plan · $406.20K straight out of an exercise
Sold at will
$491.56K
42 of 66 sales
Net
+$98.08M
+$98.86M against sales at will

By person

18 insiders · 78 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
RA CAPITAL MANAGEMENT, L.P. entity
Director
$70.00M (3)
—
+$70.00M
637,150
0.8810%
$1.48M
—
Hardie Robert D.
10% owner
$17.00M (2)
—
+$17.00M
7,152,312
9.89%
$16.63M
—
Sands Capital Ventures Discovery Fund III, L.P. entity
10% owner
$6.70M (1)
—
+$6.70M
3,417,075
4.73%
$7.94M
—
Manning Paul B
10% owner
$5.00M (1)
—
+$5.00M
657,985
0.9099%
$1.53M
—
Stalfort John A III
Director
$560.00K (1)
—
+$560.00K
352,219
0.4870%
$818.91K
+4,830%
OConnell Daniel Joseph
Chief Executive Officer
—
$323.85K (11)
−$323.85K
881,275
1.22%
$2.05M
+62,005%
Meisner Derek M
Chief Legal Officer & Corp Sec
—
$305.88K (19)
−$305.88K
173,999
0.2406%
$404.55K
—
Ives Jeffrey L.
Director
—
$272.33K (2) scheduled
−$272.33K
48,300
0.0668%
$112.30K
—
Zuga Matt
CFO & Chief Business Officer
—
$146.26K (11) scheduled
−$146.26K
304,924
0.4216%
$708.95K
—
Fountain Nathan B
Director
$100.00K (1)
$14.27K (1)
+$85.73K
48,150
0.0666%
$111.95K
—
Porter Derrell
Director
—
$75.24K (3) scheduled
−$75.24K
35,500
0.0491%
$82.54K
—
Siemers Eric
Chief Medical Officer
—
$63.88K (7) scheduled
−$63.88K
255,371
0.3531%
$593.74K
—
Barton Russell
Chief Operating Officer
—
$59.39K (9)
−$59.39K
205,092
0.2836%
$476.84K
—
Doherty James J.
President and CDO
—
$15.15K (2)
−$15.15K
220,900
0.3055%
$513.59K
—
Schacterle Amy
Chief Regulatory Officer
—
$2.18K (1)
−$2.18K
92,303
0.1276%
$214.60K
—
Drapkin Kimberlee C
Director
—
—
—
48,300
0.0668%
$112.30K
—
Stoppel Laura
Director
—
—
—
48,300
0.0668%
$112.30K
—
Golumbeski George
Director
—
—
—
35,500
0.0491%
$82.54K
—

Individual transactions

9
Insider
Date
Role
Action
Shares
Price
Amount
RA CAPITAL MANAGEMENT, L.P.
21 Jul 2023
Director
Buy indirect
5,161,290
$7.75
$40.00M
RA CAPITAL MANAGEMENT, L.P.
6 Jul 2021
Director
Buy indirect
115,668
$16.00
$1.85M
RA CAPITAL MANAGEMENT, L.P.
6 Jul 2021
Director
Buy indirect
1,759,332
$16.00
$28.15M
Sands Capital Ventures Discovery Fund III, L.P.
6 Jul 2021
10% owner
Buy
450,000
$14.88
$6.70M
Fountain Nathan B
6 Jul 2021
Director
Buy
6,250
$16.00
$100.00K
Hardie Robert D.
6 Jul 2021
10% owner
Buy indirect
750,000
$16.00
$12.00M
Hardie Robert D.
6 Jul 2021
10% owner
Buy indirect
312,500
$16.00
$5.00M
Stalfort John A III
6 Jul 2021
Director
Buy
35,000
$16.00
$560.00K
Manning Paul B
6 Jul 2021
10% owner
Buy indirect
312,500
$16.00
$5.00M
Show all 78 transactions →

What was left out

Form 4 filings counted 120
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 9
Sales on a Rule 10b5-1 plan 16
Sales straight out of an exercise 8
Sales at will 42
Transactions with no price 0
Shares from compensation/vesting 30,618,063
History held since 2 Jul 2021