Acumen Pharmaceuticals, Inc.
ABOS · Biological Products, (No Diagnostic Substances) · 72.2M shares · +44%/yr ↑ dilution · EDGAR filings ↗
Reference price $2.33 · est. market cap ~$168M — last insider sale, 2026-06-17 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
D44Clinical/early-stage biotech — Alzheimer's clinical, funded.
Strengths
- Liquidity — current ratio 4.1 (50th)
Risks
- Pre-revenue, deep losses — per metrics
- Pre-revenue/clinical-stage — history of losses & need for capital per risk factors
- Binary clinical & funding risk — per 10-K
Notable findings
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Chronic dilutionShare count +44%/yr over 3y (dilution, book value/share -88%)
- Strong balance sheetStrong balance sheet — $117M cash & investments
- Notable holderHeld by 5 notable fund(s): FMR LLC, RENAISSANCE TECHNOLOGIES LLC, GOLDMAN SACHS GROUP INC +2 more (as of 2026-03-31)
- Insider sellingInsider selling — 48 open-market sale(s) by 9 insider(s) (cluster of 9 insiders, ~$625,431, last 6mo) Form 4 ↗
Key metrics
Return on equity
-172.3%
Return on assets
-98.8%
ROIC
-105.4%
Debt / equity
0.3×
Current ratio
4.1×
Tangible book value
$70M
Cash & investments
$117M
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-17 | Porter Derrell | Option exercise | 13K | $1.07 |
| 2026-06-17 | Porter Derrell | Sell | 13K | $2.33 |
| 2026-06-16 | Porter Derrell | Sell | 13K | $2.33 |
| 2026-06-15 | Porter Derrell | Sell | 6.5K | $2.35 |
| 2026-06-15 | Porter Derrell | Option exercise | 6.5K | $1.07 |
| 2026-06-09 | Fountain Nathan B | Sell | 6.4K | $2.23 |
| 2026-06-03 | Stoppel Laura | Grant | 36K | — |
| 2026-06-03 | RA CAPITAL MANAGEMENT, L.P. | Grant | 36K | — |
| 2026-06-03 | Porter Derrell | Grant | 36K | — |
| 2026-06-03 | Fountain Nathan B | Grant | 36K | — |
| 2026-06-03 | Drapkin Kimberlee C | Grant | 36K | — |
| 2026-06-03 | Stalfort John A III | Grant | 36K | — |
| 2026-06-03 | Ives Jeffrey L. | Grant | 36K | — |
| 2026-06-03 | Golumbeski George | Grant | 36K | — |
| 2026-03-16 | RA CAPITAL MANAGEMENT, L.P. | Grant | 6.1M | $3.30 |
| 2026-03-06 | Meisner Derek M | Option exercise | 2.1K | $1.85 |
| 2026-03-06 | Meisner Derek M | Sell | 2.1K | $3.26 |
| 2026-02-27 | Meisner Derek M | Option exercise | 9.4K | $1.85 |
| 2026-02-27 | Meisner Derek M | Sell | 9.4K | $3.01 |
| 2026-01-28 | Meisner Derek M | Sell | 2.7K | $3.00 |
| 2026-01-28 | Meisner Derek M | Option exercise | 2.7K | $1.85 |
| 2026-01-26 | Meisner Derek M | Sell | 15K | $3.00 |
| 2026-01-26 | Meisner Derek M | Option exercise | 15K | $1.85 |
| 2026-01-23 | Meisner Derek M | Sell | 5.6K | $1.90 |
| 2026-01-22 | Barton Russell | Sell | 462 | $1.84 |
| 2026-01-22 | Meisner Derek M | Sell | 1.1K | $1.84 |
| 2026-01-22 | Siemers Eric | Sell | 895 | $1.82 |
| 2026-01-22 | Zuga Matt | Sell | 1.7K | $1.86 |
| 2026-01-22 | OConnell Daniel Joseph | Sell | 2.7K | $1.88 |
| 2026-01-21 | OConnell Daniel Joseph | Sell | 9.3K | $1.81 |
| 2026-01-21 | Zuga Matt | Sell | 2.5K | $1.81 |
| 2026-01-21 | Meisner Derek M | Sell | 2.2K | $1.81 |
| 2026-01-21 | Barton Russell | Sell | 2.3K | $1.81 |
| 2026-01-21 | Siemers Eric | Sell | 2.3K | $1.80 |
| 2026-01-20 | OConnell Daniel Joseph | Grant | 300K | — |
| 2026-01-16 | Siemers Eric | Grant | 99K | — |
| 2026-01-16 | Zuga Matt | Grant | 99K | — |
| 2026-01-16 | Meisner Derek M | Grant | 99K | — |
| 2026-01-16 | Barton Russell | Grant | 85K | — |
| 2026-01-16 | Schacterle Amy | Grant | 85K | — |
| 2026-01-16 | Doherty James J. | Grant | 167K | — |
| 2026-01-12 | Meisner Derek M | Sell | 8.5K | $1.71 |
| 2026-01-12 | OConnell Daniel Joseph | Sell | 5.4K | $1.73 |
| 2026-01-09 | OConnell Daniel Joseph | Sell | 13K | $1.76 |
| 2026-01-09 | Meisner Derek M | Sell | 5.2K | $1.76 |
| 2026-01-08 | OConnell Daniel Joseph | Sell | 8.1K | $1.82 |
| 2026-01-08 | Zuga Matt | Sell | 6.9K | $1.82 |
| 2026-01-08 | Barton Russell | Sell | 3.5K | $1.86 |
| 2026-01-08 | Meisner Derek M | Sell | 6.8K | $1.82 |
| 2026-01-08 | Meisner Derek M | Sell | 30K | $1.82 |
| 2026-01-08 | Doherty James J. | Sell | 6.5K | $1.82 |
| 2026-01-07 | Schacterle Amy | Sell | 1.1K | $1.98 |
| 2026-01-07 | Doherty James J. | Sell | 1.7K | $1.99 |
| 2026-01-07 | Zuga Matt | Sell | 4.1K | $2.00 |
| 2026-01-07 | Zuga Matt | Sell | 1.7K | $1.99 |
| 2026-01-07 | OConnell Daniel Joseph | Sell | 38K | $1.99 |
| 2026-01-07 | Meisner Derek M | Sell | 1.7K | $1.99 |
| 2026-01-07 | Meisner Derek M | Sell | 10K | $1.99 |
| 2026-01-07 | Barton Russell | Sell | 1.7K | $1.99 |
| 2026-01-06 | Siemers Eric | Sell | 6.8K | $1.97 |
| 2026-01-06 | OConnell Daniel Joseph | Sell | 5.1K | $1.97 |
| 2026-01-06 | Barton Russell | Sell | 3.6K | $1.97 |
| 2026-01-06 | Zuga Matt | Sell | 5.1K | $1.97 |
| 2026-01-06 | Meisner Derek M | Sell | 7.1K | $1.97 |
| 2026-01-06 | Meisner Derek M | Sell | 3.8K | $1.97 |
| 2026-01-05 | Siemers Eric | Sell | 4.0K | $1.96 |
| 2026-01-05 | OConnell Daniel Joseph | Sell | 4.6K | $1.97 |
| 2026-01-05 | Meisner Derek M | Sell | 4.0K | $1.96 |
| 2026-01-05 | Zuga Matt | Sell | 4.0K | $1.96 |
| 2026-01-05 | Barton Russell | Sell | 4.0K | $1.96 |
| 2025-06-04 | Fountain Nathan B | Grant | 13K | — |
| 2025-06-04 | Stoppel Laura | Grant | 13K | — |
| 2025-06-04 | Stalfort John A III | Grant | 13K | — |
| 2025-06-04 | Drapkin Kimberlee C | Grant | 13K | — |
| 2025-06-04 | Ives Jeffrey L. | Grant | 13K | — |
| 2025-06-04 | Porter Derrell | Grant | 13K | — |
| 2025-06-04 | RA CAPITAL MANAGEMENT, L.P. | Grant | 13K | — |
| 2025-01-23 | Zuga Matt | Sell | 29K | $1.72 |
| 2025-01-21 | OConnell Daniel Joseph | Sell | 13K | $1.59 |
| 2025-01-21 | Meisner Derek M | Sell | 3.4K | $1.59 |
| 2025-01-21 | Zuga Matt | Sell | 4.4K | $1.60 |
| 2025-01-21 | Barton Russell | Sell | 2.9K | $1.61 |
| 2025-01-21 | Siemers Eric | Sell | 3.2K | $1.59 |
| 2025-01-07 | OConnell Daniel Joseph | Grant | 225K | — |
| 2025-01-06 | Siemers Eric | Grant | 67K | — |
| 2025-01-06 | Schacterle Amy | Grant | 8.8K | — |
| 2025-01-06 | Doherty James J. | Grant | 63K | — |
| 2025-01-06 | Meisner Derek M | Grant | 67K | — |
| 2025-01-06 | Barton Russell | Grant | 50K | — |
| 2025-01-06 | Zuga Matt | Grant | 67K | — |
| 2025-01-03 | Siemers Eric | Sell | 11K | $1.85 |
| 2025-01-03 | Zuga Matt | Sell | 13K | $1.84 |
| 2025-01-03 | Meisner Derek M | Sell | 11K | $1.84 |
| 2025-01-03 | OConnell Daniel Joseph | Sell | 48K | $1.84 |
| 2025-01-03 | Barton Russell | Sell | 7.6K | $1.86 |
All non-derivative Form 4 activity (SEC), newest first.
Supply chain
Customers (0)
Suppliers (1)
Named in the 10-K; linked when we track them.
Notable events (8-K)
| Date | Items | |
|---|---|---|
| 2026-06-16 | Reg FDOtherExhibits | filing ↗ |
| 2026-06-03 | Shareholder vote | filing ↗ |
| 2026-05-12 | ResultsReg FDExhibits | filing ↗ |
| 2026-03-26 | ResultsReg FDExhibits | filing ↗ |
| 2026-03-16 | Material agreement3.02Reg FDExhibits | filing ↗ |
| 2026-01-12 | Reg FDExhibits | filing ↗ |
| 2025-11-12 | ResultsReg FDExhibits | filing ↗ |
| 2025-11-10 | Exec/director changeReg FDExhibits | filing ↗ |
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-06-16 | 2026-06-12 | 0001628280-26-043416 ↗ |
| 8-K | 2026-06-03 | 2026-06-03 | 0001628280-26-040447 ↗ |
| 10-Q | 2026-05-12 | 2026-03-31 | 0001628280-26-034204 ↗ |
| 8-K | 2026-05-12 | 2026-05-12 | 0001628280-26-033868 ↗ |
| 10-K | 2026-03-26 | 2025-12-31 | 0001628280-26-021413 ↗ |
| 8-K | 2026-03-26 | 2026-03-26 | 0001628280-26-021189 ↗ |
| 8-K | 2026-03-16 | 2026-03-13 | 0001628280-26-017885 ↗ |
| 8-K | 2026-01-12 | 2026-01-12 | 0001628280-26-001774 ↗ |
| 8-K | 2025-11-12 | 2025-11-12 | 0001576885-25-000102 ↗ |
| 10-Q | 2025-11-12 | 2025-09-30 | 0001576885-25-000104 ↗ |
| 8-K | 2025-11-10 | 2025-11-06 | 0001628280-25-050800 ↗ |
| 10-Q | 2025-08-12 | 2025-06-30 | 0001576885-25-000093 ↗ |