Robert Gardner Harrison insider trades: Sera Prognostics (SERA) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Robert reports to the SEC
Open-market buys and sales
39 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 11, 2026 | SERA | ↓ Sell | 716 | $2.04 | $1K | Direct | Mar 12, 2026 (1d) |
| Mar 9, 2026 | SERA | ↓ Sell | 3,360 | $1.96 | $7K | Direct | Mar 10, 2026 (1d) |
| Feb 24, 2026 | SERA | ↓ Sell | 2,000 | $2.34 | $5K | Direct | Feb 24, 2026 (0d) |
| Jan 27, 2026 | SERA | ↓ Sell | 2,000 | $2.97 | $6K | Direct | Jan 27, 2026 (0d) |
| Dec 30, 2025 | SERA | ↓ Sell | 2,000 | $3.00 | $6K | Direct | Dec 30, 2025 (0d) |
| Dec 10, 2025 | SERA | ↓ Sell | 616 | $3.31 | $2K | Direct | Dec 11, 2025 (1d) |
| Dec 2, 2025 | SERA | ↓ Sell | 2,000 | $2.93 | $6K | Direct | Dec 3, 2025 (1d) |
| Nov 10, 2025 | SERA | ↓ Sell | 6,528 | $2.62 | $17K | Direct | Nov 12, 2025 (2d) |
| Nov 4, 2025 | SERA | ↓ Sell | 2,000 | $3.07 | $6K | Direct | Nov 4, 2025 (0d) |
| Oct 7, 2025 | SERA | ↓ Sell | 2,000 | $3.18 | $6K | Direct | Oct 8, 2025 (1d) |
| Sep 11, 2025 | SERA | ↓ Sell | 645 | $3.13 | $2K | Direct | Sep 12, 2025 (1d) |
| Sep 9, 2025 | SERA | ↓ Sell | 2,000 | $3.05 | $6K | Direct | Sep 9, 2025 (0d) |
| Aug 20, 2025 | SERA | ↓ Sell | 6,000 | $2.22 | $13K | Direct | Aug 20, 2025 (0d) |
| Aug 8, 2025 | SERA | ↓ Sell | 5,962 | $2.54 | $15K | Direct | Aug 11, 2025 (3d) |
| Jun 10, 2025 | SERA | ↓ Sell | 667 | $1.48 | $987 | Direct | Jun 11, 2025 (1d) |
| May 8, 2025 | SERA | ↓ Sell | 6,551 | $2.44 | $16K | Direct | May 9, 2025 (1d) |
| Mar 7, 2025 | SERA | ↓ Sell | 3,874 | $4.16 | $16K | Direct | Mar 10, 2025 (3d) |
| Mar 6, 2025 | SERA | ↓ Sell | 3,251 | $4.16 | $14K | Direct | Mar 7, 2025 (1d) |
| Feb 13, 2025 | SERA | ↓ Sell | 3,610 | $4.28 | $15K | Direct | Feb 14, 2025 (1d) |
| Feb 12, 2025 | SERA | ↓ Sell | 7,297 | $4.58 | $33K | Direct | Feb 14, 2025 (2d) |
| Feb 11, 2025 | SERA | ↓ Sell | 554 | $3.97 | $2K | Direct | Feb 13, 2025 (2d) |
| Jan 13, 2025 | SERA | ↓ Sell | 16,473 | $7.27 | $120K | Direct | Jan 14, 2025 (1d) |
| Nov 11, 2024 | SERA | ↓ Sell | 4,727 | $7.32 | $35K | Direct | Nov 12, 2024 (1d) |
| Aug 7, 2024 | SERA | ↓ Sell | 5,022 | $7.42 | $37K | Direct | Aug 8, 2024 (1d) |
| May 8, 2024 | SERA | ↓ Sell | 4,902 | $9.59 | $47K | Direct | May 10, 2024 (2d) |
| Mar 6, 2024 | SERA | ↓ Sell | 2,138 | $9.02 | $19K | Direct | Mar 7, 2024 (1d) |
| Feb 6, 2024 | SERA | ↓ Sell | 5,665 | $8.03 | $45K | Direct | Feb 7, 2024 (1d) |
| Jun 5, 2023 | SERA | ↓ Sell | 5,000 | $3.23 | $16K | Direct | Jun 6, 2023 (1d) |
| Feb 20, 2014 | MYGN | ↓ Sell | 17,554 | $36.22 | $636K | Direct | Feb 20, 2014 (0d) |
| Feb 12, 2014 | MYGN | ↓ Sell | 13,707 | $30.74 | $421K | Direct | Feb 12, 2014 (0d) |
| Jun 13, 2013 | MYGN | ↓ Sell | 31,498 | $36.17 | $1.1M | Direct | Jun 14, 2013 (1d) |
| Nov 30, 2012 | MYGN | ↓ Sell | 3,480 | $29.95 | $104K | Direct | Dec 4, 2012 (4d) |
| Nov 6, 2012 | MYGN | ↓ Sell | 38,446 | $30.05 | $1.2M | Direct | Nov 8, 2012 (2d) |
| Mar 15, 2012 | MYGN | ↓ Sell | 36,000 | $24.99 | $900K | Direct | Mar 16, 2012 (1d) |
| Feb 15, 2012 | MYGN | ↓ Sell | 2,204 | $23.40 | $52K | Direct | Feb 17, 2012 (2d) |
| May 11, 2011 | MYGN | ↓ Sell | 20,000 | $23.08 | $462K | Direct | May 12, 2011 (1d) |
| Sep 10, 2009 | MYGN | ↓ Sell | 13,196 | $31.11 | $411K | Direct | Sep 10, 2009 (0d) |
| Feb 3, 2009 | MYGN | ↓ Sell | 4,000 | $82.50 | $330K | Direct | Feb 5, 2009 (2d) |
| Aug 27, 2008 | MYGN | ↓ Sell | 4,085 | $65.90 | $269K | Direct | Aug 27, 2008 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other SERA insiders
Open-market trades in the last 12 months
About Robert Gardner Harrison's insider trades
Robert Gardner Harrison is Chief Information Officer at Sera Prognostics (SERA). Since Aug 27, 2008, Robert has reported no open-market purchases and 39 sales worth $6.4M on SEC Form 4. In the last 12 months: 8 sales ($50K).
Their filings also include grants and awards (16 filings), option exercises (10 filings), gifts (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every SERA insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.