Robert Gardner Harrison sold $5,860 of SERA
Chief Information Officer at SERA PROGNOSTICS, INC.. 2,000 shares at an average of $2.93, traded Dec 2, 2025, filed Dec 3, 2025.
Score components
- +15RoleOfficer
- 0Trade size$6k at market
- 0Share of holdings soldSold 2.2% of holdings
- +15Cluster8 insiders selling within 14 days
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -2.9%, 3m -34.6%, 6m -33.7%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001193125-25-306710, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 2, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -2,000 | $2.93 | $5,860 | 87,404 | Dec 3, 2025 |
Related signals
Other insiders at SERA PROGNOSTICS, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 30Weak | SERA PROGNOSTICS, INC. | Dyaarl Lee Anderson Jr. Chief Commercial Officer | $3,600 1,800 shares | -2% | |
| 30Weak | SERA PROGNOSTICS, INC. | Tiffany Eul Davis Inglis Chief Medical Officer | $972 486 shares | -1% | |
| 30Weak | SERA PROGNOSTICS, INC. | Benjamin Jackson General Counsel | $4,380 2,190 shares | -1% | |
| 40Moderate | SERA PROGNOSTICS, INC. | Zhenya Lindgardt Chief Executive Officer | $14k 7,022 shares | -1% | |
| 46Moderate | SERA PROGNOSTICS, INC. | Zhenya Lindgardt Chief Executive Officer | $40k 20,139 shares | -2% | |
| 37Weak | SERA PROGNOSTICS, INC. | Austin Aerts Chief Financial Officer | $4,094 2,037 shares | -1% | |
| 30Weak | SERA PROGNOSTICS, INC. | Dyaarl Lee Anderson Jr. Chief Commercial Officer | $9,525 4,739 shares | -6% | |
| 30Weak | SERA PROGNOSTICS, INC. | Tiffany Eul Davis Inglis Chief Medical Officer | $728 362 shares | -0% | |
| 30Weak | SERA PROGNOSTICS, INC. | Benjamin Jackson General Counsel | $4,380 2,179 shares | -1% | |
| 40Moderate | SERA PROGNOSTICS, INC. | Zhenya Lindgardt Chief Executive Officer | $14k 6,990 shares | -1% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.