ABOS Insider Trading
SEC Form 4 transaction history for ABOS. Filings have up to a 2 business day reporting delay.
Insiders at ABOS reported 4 open-market sells worth $90K in the last 90 days, with no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification, and estate reasons all the time. Latest filing: Porter Derrell on 2026-06-17.
Buys (90d)
0
Buy value (90d)
$0
Sells (90d)
4
Sell value (90d)
$90K
Transaction History
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-17 | Porter Derrell | - | Sell | 13.0K | $2.33 | $30K |
| 2026-06-17 | Porter Derrell | - | Option exercise | 13.0K | $1.07 | $14K |
| 2026-06-16 | Porter Derrell | - | Sell | 12.8K | $2.33 | $30K |
| 2026-06-15 | Porter Derrell | - | Sell | 6.5K | $2.35 | $15K |
| 2026-06-15 | Porter Derrell | - | Option exercise | 6.5K | $1.07 | $7K |
| 2026-06-09 | Fountain Nathan B | - | Sell | 6.4K | $2.23 | $14K |
| 2026-06-03 | Stalfort John A III | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | Drapkin Kimberlee C | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | Fountain Nathan B | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | Porter Derrell | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | Ives Jeffrey L. | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | Golumbeski George | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | Stoppel Laura | - | Grant | 35.5K | $0.00 | $0 |
| 2026-06-03 | RA CAPITAL MANAGEMENT, L.P. | - | Grant | 35.5K | $0.00 | $0 |
| 2026-03-16 | RA CAPITAL MANAGEMENT, L.P. | - | Grant | 6.06M | $3.30 | $20.0M |
| 2026-03-06 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 2.1K | $3.26 | $7K |
| 2026-03-06 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise | 2.1K | $1.85 | $4K |
| 2026-02-27 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise | 9.4K | $1.85 | $17K |
| 2026-02-27 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 9.4K | $3.01 | $28K |
| 2026-01-28 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 2.7K | $3.00 | $8K |
| 2026-01-28 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise | 2.7K | $1.85 | $5K |
| 2026-01-26 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise | 15.1K | $1.85 | $28K |
| 2026-01-26 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 15.1K | $3.00 | $45K |
| 2026-01-23 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 5.6K | $1.90 | $11K |
| 2026-01-22 | Siemers Eric | Chief Medical Officer | Sell | 895 | $1.82 | $2K |
| 2026-01-22 | Zuga Matt | CFO & Chief Business Officer | Sell | 1.7K | $1.86 | $3K |
| 2026-01-22 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 1.1K | $1.84 | $2K |
| 2026-01-22 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 2.7K | $1.88 | $5K |
| 2026-01-22 | Barton Russell | Chief Operating Officer | Sell | 462 | $1.84 | $850 |
| 2026-01-21 | Zuga Matt | CFO & Chief Business Officer | Sell | 2.5K | $1.81 | $4K |
| 2026-01-21 | Barton Russell | Chief Operating Officer | Sell | 2.3K | $1.81 | $4K |
| 2026-01-21 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 2.2K | $1.81 | $4K |
| 2026-01-21 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 9.3K | $1.81 | $17K |
| 2026-01-21 | Siemers Eric | Chief Medical Officer | Sell | 2.3K | $1.80 | $4K |
| 2026-01-20 | OConnell Daniel Joseph | Chief Executive Officer | Grant | 299.8K | $0.00 | $0 |
| 2026-01-16 | Zuga Matt | CFO & Chief Business Officer | Grant | 99.1K | $0.00 | $0 |
| 2026-01-16 | Meisner Derek M | Chief Legal Officer & Corp Sec | Grant | 99.1K | $0.00 | $0 |
| 2026-01-16 | Siemers Eric | Chief Medical Officer | Grant | 99.1K | $0.00 | $0 |
| 2026-01-16 | Barton Russell | Chief Operating Officer | Grant | 84.6K | $0.00 | $0 |
| 2026-01-16 | Schacterle Amy | Chief Regulatory Officer | Grant | 84.6K | $0.00 | $0 |
| 2026-01-16 | Doherty James J. | President and CDO | Grant | 166.9K | $0.00 | $0 |
| 2026-01-12 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 5.4K | $1.73 | $9K |
| 2026-01-12 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 8.5K | $1.71 | $15K |
| 2026-01-09 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 5.2K | $1.76 | $9K |
| 2026-01-09 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 12.9K | $1.76 | $23K |
| 2026-01-08 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 30.1K | $1.82 | $55K |
| 2026-01-08 | Barton Russell | Chief Operating Officer | Sell | 3.5K | $1.86 | $7K |
| 2026-01-08 | Zuga Matt | CFO & Chief Business Officer | Sell | 6.9K | $1.82 | $13K |
| 2026-01-08 | Doherty James J. | President and CDO | Sell | 6.5K | $1.82 | $12K |
| 2026-01-08 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 8.1K | $1.82 | $15K |
| 2026-01-08 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 6.8K | $1.82 | $12K |
| 2026-01-07 | Doherty James J. | President and CDO | Sell | 1.7K | $1.99 | $3K |
| 2026-01-07 | Schacterle Amy | Chief Regulatory Officer | Sell | 1.1K | $1.98 | $2K |
| 2026-01-07 | Zuga Matt | CFO & Chief Business Officer | Sell | 1.7K | $1.99 | $3K |
| 2026-01-07 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 10.1K | $1.99 | $20K |
| 2026-01-07 | Zuga Matt | CFO & Chief Business Officer | Sell | 4.1K | $2.00 | $8K |
| 2026-01-07 | Barton Russell | Chief Operating Officer | Sell | 1.7K | $1.99 | $3K |
| 2026-01-07 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 1.7K | $1.99 | $3K |
| 2026-01-07 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 37.8K | $1.99 | $75K |
| 2026-01-06 | Siemers Eric | Chief Medical Officer | Sell | 6.8K | $1.97 | $13K |
| 2026-01-06 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 7.1K | $1.97 | $14K |
| 2026-01-06 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 3.8K | $1.97 | $7K |
| 2026-01-06 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 5.1K | $1.97 | $10K |
| 2026-01-06 | Zuga Matt | CFO & Chief Business Officer | Sell | 5.1K | $1.97 | $10K |
| 2026-01-06 | Barton Russell | Chief Operating Officer | Sell | 3.6K | $1.97 | $7K |
| 2026-01-05 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell | 4.0K | $1.96 | $8K |
| 2026-01-05 | Barton Russell | Chief Operating Officer | Sell | 4.0K | $1.96 | $8K |
| 2026-01-05 | Siemers Eric | Chief Medical Officer | Sell | 4.0K | $1.96 | $8K |
| 2026-01-05 | OConnell Daniel Joseph | Chief Executive Officer | Sell | 4.6K | $1.97 | $9K |
| 2026-01-05 | Zuga Matt | CFO & Chief Business Officer | Sell | 4.0K | $1.96 | $8K |
Form 4 filings have a reporting delay of up to 2 business days. Insiders sell for many non-signal reasons (diversification, tax planning). This is observation data, not a recommendation.
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Understanding
Interpreting ABOS insider filings
Officers, directors, and 10% owners of ABOS must report every trade in their own stock to the SEC within two business days on Form 4. We parse each filing as it lands on EDGAR, so this page is the same primary-source record professionals read, minus the paywall.
The asymmetry that makes this data useful: insiders sell for dozens of innocent reasons (taxes, diversification, a house), but they voluntarily buy on the open market for exactly one reason. That is why buys are headlined and one-off sells deserve little weight.
The strongest historical pattern is the cluster: several different insiders buying within days of each other. A lone director's small buy is noise; the CFO and two directors buying the same week is a documented anomaly worth your attention.
Frequently Asked Questions
Who files Form 4 for ABOS?
Officers, directors, and 10%+ owners of ABOS must report their trades to the SEC within 2 business days.
What do the transaction types mean?
Buy (P) and Sell (S) are open-market trades, the strongest signals. Grants, option exercises, and gifts are routine compensation events.
How fresh is this data?
We poll SEC EDGAR every 30 minutes. New filings appear here shortly after the SEC publishes them.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.