Brian S. Posner
Brian S. Posner has made 1 open-market purchase worth $40k since Oct 6, 2026, in 1 company. The latest: $40k of DYN, filed Oct 6, 2026, scored 31 out of 100.
Director, Dyne Therapeutics, Inc.
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Purchases
| Filed | Stock | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Oct 6 Form 4 (opens sec.gov) |
DYNDyne Therapeutics, Inc. · DirectorDirector · Near 52-week low | +10% stake | 31 | $40k 2,500 at $16.00 |
−5.8% | waiting |
Track record (hypothetical): a week after the filing, these buys averaged −5.8% (0% up, 1 measured).
Questions
What stock has Brian S. Posner bought?
DYN (Dyne Therapeutics, Inc.), all on the open market and reported on SEC Form 4.
When did Brian S. Posner last buy?
Oct 6, 2026: 2,500 shares of DYN at $16.00, $40k in all (Form 4 (opens sec.gov)).
Has Brian S. Posner filed a notice of a planned sale?
Not in the filings on record. A Form 144 is the notice an insider must file before selling restricted or control shares, and it lands on EDGAR before the sale is reported.
Is Brian S. Posner a routine or an opportunistic buyer?
There isn't enough history to say yet.
Data as of Oct 6, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer