Posner Brian S
14 Form 4 · free tier: 48h delay
Recent Form 4 slice from EDGAR — up to 30 filings (not a full archive).
For informational purposes only. Not investment advice. Data is aggregated from public SEC and congressional disclosures. Nothing on this site is a recommendation to buy or sell any security. Public disclosure of a trade is not evidence of wrongdoing or insider trading.
Recent Form 4 trades
Open-market purchases and sales
Dyne Therapeutics, Inc.
DYN · Trade · Oct 2, 2026 · Filed · Oct 6, 2026 · filed 4 days after trade
$40,000
2,500 sh
Dyne Therapeutics, Inc.
DYN · Trade · Jun 8, 2026 · Filed · Jun 9, 2026
$33,880
2,000 sh
ARCH CAPITAL GROUP LTD.
ACGL · Trade · Jun 3, 2026 · Filed · Jun 4, 2026
$58,980
3,000 sh
Dyne Therapeutics, Inc.
DYN · Trade · Jun 3, 2026 · Filed · Jun 5, 2026 · filed 2 days after trade
$43,700
2,500 sh
Dyne Therapeutics, Inc.
DYN · Trade · May 26, 2026 · Filed · May 28, 2026 · filed 2 days after trade
$36,420
2,000 sh
Dyne Therapeutics, Inc.
DYN · Trade · May 20, 2026 · Filed · May 22, 2026 · filed 2 days after trade
$42,800
2,500 sh
ARCH CAPITAL GROUP LTD.
ACGL · Trade · May 11, 2026 · Filed · May 12, 2026
$34,283
2,000 sh
Dyne Therapeutics, Inc.
DYN · Trade · Mar 30, 2026 · Filed · Apr 1, 2026 · filed 2 days after trade
$34,160
2,000 sh
ARCH CAPITAL GROUP LTD.
ACGL · Trade · Mar 11, 2026 · Filed · Mar 12, 2026
$51,345
3,000 sh
Dyne Therapeutics, Inc.
DYN · Trade · Mar 11, 2026 · Filed · Mar 13, 2026 · filed 2 days after trade
$38,700
2,000 sh
Dyne Therapeutics, Inc.
DYN · Trade · Mar 6, 2026 · Filed · Mar 10, 2026 · filed 4 days after trade
$45,180
3,000 sh
ARCH CAPITAL GROUP LTD.
ACGL · Trade · Aug 1, 2025 · Filed · Aug 4, 2025 · filed 3 days after trade
$17,338
1,000 sh
ARCH CAPITAL GROUP LTD.
ACGL · Trade · Oct 28, 2022 · Filed · Nov 1, 2022 · filed 4 days after trade
$35,200
2,000 sh
ARCH CAPITAL GROUP LTD.
ACGL · Trade · Apr 29, 2022 · Filed · May 2, 2022 · filed 3 days after trade
$38,450
2,000 sh