ABOS Acumen Pharmaceuticals, Inc.

NASDAQ
$2.57

Acumen Pharmaceuticals, Inc. (ABOS) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with ABOS's own trailing one-year pace, with 14% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 0 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
9
48 transactions
Purchases
$0
0 shares
Sales
$625.4K
305,128 shares
Net activity
-$625.4K
purchases less sales

How much of that selling was preplanned? 14% planned / 86% discretionary

10b5-1 plan sales $88.4K 4 transactions · 29,252 shares
Discretionary sales $537.0K 44 transactions · 275,876 shares

Largest single sale: $75.0K.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Porter Derrell Director Sell 13,040 $2.33 $30.3K 35,500 −26.9% of holding
Porter Derrell Director Sell 12,800 $2.33 $29.8K 35,500 −26.5% of holding
Porter Derrell Director Sell 6,460 $2.35 $15.1K 48,300 −11.8% of holding
Fountain Nathan B Director Sell 6,400 $2.23 $14.3K 48,150 −11.7% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 10b5-1 2,090 $3.26 $6.8K 173,999 −1.2% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 10b5-1 9,406 $3.01 $28.3K 173,999 −5.1% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 10b5-1 2,671 $3.00 $8.0K 173,999 −1.5% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 10b5-1 15,085 $3.00 $45.3K 173,999 −8% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 5,633 $1.90 $10.7K 173,999 −3.1% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 2,689 $1.88 $5.1K 881,275 −0.3% of holding
Zuga Matt CFO & Chief Business Officer Sell 1,687 $1.86 $3.1K 304,924 −0.6% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 1,054 $1.84 $1.9K 179,632 −0.6% of holding
Siemers Eric Chief Medical Officer Sell 895 $1.82 $1.6K 255,371 −0.3% of holding
Barton Russell Chief Operating Officer Sell 462 $1.84 $850 205,092 −0.2% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 9,346 $1.81 $16.9K 883,964 −1% of holding
Zuga Matt CFO & Chief Business Officer Sell 2,473 $1.81 $4.5K 306,611 −0.8% of holding
Siemers Eric Chief Medical Officer Sell 2,331 $1.80 $4.2K 256,266 −0.9% of holding
Barton Russell Chief Operating Officer Sell 2,315 $1.81 $4.2K 205,554 −1.1% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 2,247 $1.81 $4.1K 180,686 −1.2% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 8,548 $1.71 $14.7K 83,800 −9.3% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 5,388 $1.73 $9.3K 593,510 −0.9% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 12,941 $1.76 $22.8K 598,898 −2.1% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 5,200 $1.76 $9.2K 92,348 −5.3% of holding
Meisner Derek M 2 fills Chief Legal Officer & Corp Sec Sell 36,911 $1.82 $67.2K 127,640 −22.4% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 8,143 $1.82 $14.8K 611,839 −1.3% of holding
Zuga Matt CFO & Chief Business Officer Sell 6,888 $1.82 $12.5K 209,951 −3.2% of holding
Doherty James J. President and CDO Sell 6,467 $1.82 $11.8K 54,033 −10.7% of holding
Barton Russell Chief Operating Officer Sell 3,530 $1.86 $6.6K 123,269 −2.8% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 37,755 $1.99 $75.0K 619,982 −5.7% of holding
Meisner Derek M 2 fills Chief Legal Officer & Corp Sec Sell 11,770 $1.99 $23.4K 144,529 −7.5% of holding
Zuga Matt 2 fills CFO & Chief Business Officer Sell 5,805 $1.99 $11.6K 218,539 −2.6% of holding
Doherty James J. President and CDO Sell 1,700 $1.99 $3.4K 60,500 −2.7% of holding
Barton Russell Chief Operating Officer Sell 1,700 $1.99 $3.4K 126,799 −1.3% of holding
Schacterle Amy Chief Regulatory Officer Sell 1,097 $1.98 $2.2K 7,703 −12.5% of holding
Meisner Derek M 2 fills Chief Legal Officer & Corp Sec Sell 10,898 $1.97 $21.4K 150,030 −6.8% of holding
Siemers Eric Chief Medical Officer Sell 6,834 $1.97 $13.4K 159,464 −4.1% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 5,102 $1.97 $10.0K 657,737 −0.8% of holding
Zuga Matt CFO & Chief Business Officer Sell 5,100 $1.97 $10.0K 222,644 −2.2% of holding
Barton Russell Chief Operating Officer Sell 3,618 $1.97 $7.1K 128,499 −2.7% of holding
OConnell Daniel Joseph Chief Executive Officer Sell 4,649 $1.97 $9.2K 662,839 −0.7% of holding
Zuga Matt CFO & Chief Business Officer Sell 4,000 $1.96 $7.8K 227,744 −1.7% of holding
Meisner Derek M Chief Legal Officer & Corp Sec Sell 4,000 $1.96 $7.8K 157,127 −2.5% of holding
Siemers Eric Chief Medical Officer Sell 4,000 $1.96 $7.8K 166,298 −2.3% of holding
Barton Russell Chief Operating Officer Sell 4,000 $1.96 $7.8K 132,117 −2.9% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.