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Posner Brian S
InsiderCIK 0001372455
Total Volume
$947.8K
11 filings
Purchases
$204.2K
6 buy txns
Sales
$144.6K
3 sell txns
Net Activity
$59.6K
net bought
Profile
- Filings
- 11
- Buy transactions
- 6
- Sell transactions
- 3
- Companies
- 2
- Active
- 2025–2026
Posner Brian S accounts for 11 disclosed filings worth $947.8K, spread across 2 companies, active 2025–2026. The record is a roughly balanced mix of buying and selling, with $204.2K in purchases against $144.6K in sales. The largest single open-market purchase on record is $43.7K in Dyne Therapeutics, Inc.. Data is sourced from official SEC Form 3, 4, and 5 filings.
Associated Companies
Trading History
11 loaded
| Jun 9 | DYN Dyne Therapeutics, Inc. | Posner Brian S | Insider | Buy | $33.9K |
| Jun 5 | DYN Dyne Therapeutics, Inc. | Posner Brian S | Insider | Buy | $43.7K |
| Jun 4 | ACGL ARCH CAPITAL GROUP LTD. | Posner Brian S | Director | Sell | $59.0K |
| May 28 | DYN Dyne Therapeutics, Inc. | Posner Brian S | Insider | Buy | $36.4K |
| May 12 | ACGL ARCH CAPITAL GROUP LTD. | Posner Brian S | Director | Sell | $34.3K |
| May 7 | ACGL ARCH CAPITAL GROUP LTD. | Posner Brian S | Director | Grant | $0 |
| Apr 1 | DYN Dyne Therapeutics, Inc. | Posner Brian S | Insider | Buy | $34.2K |
| Mar 13 | DYN Dyne Therapeutics, Inc. | Posner Brian S | Insider | Buy | $38.7K |
| Mar 12 | ACGL ARCH CAPITAL GROUP LTD. | Posner Brian S | Director | Sell | $51.3K |
| Oct 2 | DYN Dyne Therapeutics, Inc. | Posner Brian S | Insider | Other | $0 |
| Aug 4 | ACGL ARCH CAPITAL GROUP LTD. | Posner Brian S | Insider | Buy | $17.3K |
11 filings