Barton Russell, Chief Operating Officer of Acumen Pharmaceuticals ($ABOS), made six open market sales of company stock over the past year, totaling nearly $30,000. His most recent sale occurred on January 22, 2026. These transactions rank 10,828th among 11,678 individual insiders in our database, where the average sale value hits $8.6 million across about six deals per insider. Russell recorded no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 22, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 462 | $1.84 | 205,092.0000 | 60,573,425 | 0.22% | 0.00% |
| Jan. 21, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 2315 | $1.81 | 205,554.0000 | 60,573,425 | 1.11% | 0.00% |
| Jan. 16, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Employee Stock Option (right to buy) | 126900 | $0.00 | 126,900.0000 | 60,573,425 | 9999.99% | 0.21% |
| Jan. 16, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Common Stock | 84600 | $0.00 | 207,869.0000 | 60,573,425 | 68.63% | 0.14% |
| Jan. 8, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 3530 | $1.86 | 123,269.0000 | 60,573,425 | 2.78% | 0.01% |
| Jan. 6, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 3618 | $1.97 | 128,499.0000 | 60,573,425 | 2.74% | 0.01% |
| Jan. 7, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 1700 | $1.99 | 126,799.0000 | 60,573,425 | 1.32% | 0.00% |
| Jan. 5, 2026 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 4000 | $1.96 | 132,117.0000 | 60,573,425 | 2.94% | 0.01% |
| Jan. 21, 2025 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 2914 | $1.61 | 136,117.0000 | 0 | 2.10% | 0.00% |
| Jan. 6, 2025 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Employee Stock Option (right to buy) | 74700 | $0.00 | 74,700.0000 | 0 | 9999.99% | 0.00% |
| Jan. 3, 2025 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 7636 | $1.86 | 89,231.0000 | 0 | 7.88% | 0.00% |
| Jan. 6, 2025 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Common Stock | 49800 | $0.00 | 139,031.0000 | 0 | 55.81% | 0.00% |
| Jan. 18, 2024 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | S | Common Stock | 2833 | $3.73 | 96,867.0000 | 0 | 2.84% | 0.00% |
| Jan. 2, 2024 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Common Stock | 73000 | $0.00 | 99,700.0000 | 0 | 273.41% | 0.00% |
| Jan. 2, 2024 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Employee Stock Option (right to buy) | 110000 | $0.00 | 110,000.0000 | 0 | 9999.99% | 0.00% |
| Jan. 17, 2023 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Employee Stock Option (right to buy) | 120200 | $0.00 | 120,200.0000 | 0 | 9999.99% | 0.00% |
| Jan. 17, 2023 | Acumen Pharmaceuticals, Inc. | $ABOS | Barton Russell | Chief Operating Officer | A | Common Stock | 26700 | $0.00 | 26,700.0000 | 0 | 9999.99% | 0.00% |