Brian S Posner: insider trades
Every open market trade Brian S Posner has filed with the SEC, when each filing appeared, and how the buys did against the S&P 500 once the filing was public.
Key Facts
- Brian S Posner is listed as Director at ACGL, DYN.
- Between 2026-03-10 (10 March 2026) and 2026-06-09 (9 June 2026) Brian S Posner filed 4 open market buys worth $156K and 1 open market sale worth $59.0K.
- Across 4 scored buys, Brian S Posner averaged +8.1% against the S&P 500 (SPY) over the 90 days after disclosure, with 75% of them ahead of the index. That result is too few trades to draw a conclusion.
- Data as of 2026-09-29 (29 September 2026).
Would copying Brian S Posner have paid?
prices as of 2026-09-28The result. Across 4 scored buys, Brian S Posner averaged +8.1% against the S&P 500 (SPY) over the 90 days after disclosure, with 75% of them ahead of the index. That result is too few trades to draw a conclusion.
| Days after entry | Scored buys | Avg vs S&P | Beat S&P | Entry months | t statistic | Reading |
|---|---|---|---|---|---|---|
| 30 days | 4 | +4.7% | 50% | 4 | n/a | too few trades to draw a conclusion |
| 90 days | 4 | +8.1% | 75% | 4 | n/a | too few trades to draw a conclusion |
| 180 days | 1 | +7.0% | 100% | 1 | n/a | too few trades to tell |
A return curve needs at least 10 scored buys. Brian S Posner does not have enough yet.
Stocks traded
Every open market trade
as of 2026-09-29| Filed | Stock | Type | Shares | Price | Value | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 9 Jun 2026 | DYN | buy | 2,000 | $16.94 | $33.9K | +9.1% |
| 4 Jun 2026 | ACGL | sell | 3,000 | $19.66 | $59.0K | n/a |
| 22 May 2026 | DYN | buy | 2,500 | $17.12 | $42.8K | +41.2% |
| 1 Apr 2026 | DYN | buy | 2,000 | $17.08 | $34.2K | +1.7% |
| 10 Mar 2026 | DYN | buy | 3,000 | $15.06 | $45.2K | -19.6% |
Nothing matches that search.
Insider sales are shown but not scored, because they are often planned for tax or diversification reasons.
Related pages
Frequently asked questions
What has Brian S Posner bought and sold?
Between 2026-03-10 (10 March 2026) and 2026-06-09 (9 June 2026) Brian S Posner filed 4 open market buys worth $156K and 1 open market sale worth $59.0K.
Did Brian S Posner's buys beat the market?
Across 4 scored buys, Brian S Posner averaged +8.1% against the S&P 500 (SPY) over the 90 days after disclosure, with 75% of them ahead of the index. That result is too few trades to draw a conclusion. Insider sales are not scored because they are often planned for tax or diversification reasons.
Sources: Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.
Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.