John A Orwin insider trades: Atreca (BCEL) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where John reports to the SEC






and 5 more companies
Open-market buys and sales
24 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Apr 11, 2024 | BCEL | ↑ Buy | 1 | $0.01 | $0 | Direct | Apr 17, 2024 (6d) |
| Sep 1, 2023 | BCEL | ↓ Sell | 22,951 | $0.37 | $9K | Direct | Apr 3, 2024 (215d) |
| Sep 2, 2022 | BCEL | ↓ Sell | 20,908 | $1.78 | $37K | Direct | Sep 20, 2022 (18d) |
| Mar 17, 2020 | BCEL | ↑ Buy | 6,000 | $12.79 | $77K | Direct | Mar 19, 2020 (2d) |
| Feb 12, 2016 | SGEN | ↑ Buy | 2,000 | $28.33 | $57K | Direct | Feb 17, 2016 (5d) |
| Dec 7, 2015 | RLYP | ↓ Sell | 15,000 | $28.28 | $424K | Direct | Dec 9, 2015 (2d) |
| Dec 4, 2015 | RLYP | ↓ Sell | 40,000 | $25.00 | $1.0M | Direct | Dec 4, 2015 (0d) |
| Aug 17, 2015 | RLYP | ↓ Sell | 5,000 | $24.84 | $124K | Direct | Aug 19, 2015 (2d) |
| Jul 31, 2015 | RLYP | ↓ Sell | 30,000 | $33.56 | $1.0M | Direct | Aug 3, 2015 (3d) |
| Jun 1, 2015 | RLYP | ↓ Sell | 33,555 | $36.42 | $1.2M | Direct | Jun 2, 2015 (1d) |
| Nov 20, 2013 | RLYP | ↑ Buy | 15,000 | $11.00 | $165K | Direct | Nov 20, 2013 (0d) |
| Feb 1, 2013 | AFFY | ↓ Sell10b5-1 | 6,366 | $18.81 | $120K | Direct | Feb 5, 2013 (4d) |
| Dec 3, 2012 | AFFY | ↓ Sell10b5-1 | 15,798 | $24.22 | $383K | Direct | Dec 4, 2012 (1d) |
| Oct 5, 2012 | AFFY | ↓ Sell10b5-1 | 41,664 | $22.50 | $937K | Direct | Oct 9, 2012 (4d) |
| Oct 1, 2012 | AFFY | ↓ Sell10b5-1 | 11,632 | $21.04 | $245K | Direct | Oct 3, 2012 (2d) |
| Sep 13, 2012 | AFFY | ↓ Sell10b5-1 | 48,997 | $20.00 | $980K | Direct | Sep 17, 2012 (4d) |
| Aug 20, 2012 | AFFY | ↓ Sell10b5-1 | 48,996 | $17.50 | $857K | Direct | Aug 22, 2012 (2d) |
| Aug 1, 2012 | AFFY | ↓ Sell10b5-1 | 1,100 | $16.31 | $18K | Direct | Aug 3, 2012 (2d) |
| Jul 13, 2012 | AFFY | ↓ Sell10b5-1 | 18,700 | $15.00 | $281K | Direct | Jul 17, 2012 (4d) |
| Apr 27, 2012 | AFFY | ↓ Sell10b5-1 | 30,000 | $13.35 | $401K | Direct | May 1, 2012 (4d) |
| Apr 3, 2012 | AFFY | ↓ Sell10b5-1 | 16,500 | $11.93 | $197K | Direct | Apr 5, 2012 (2d) |
| Mar 27, 2012 | AFFY | ↓ Sell10b5-1 | 8,200 | $15.70 | $129K | Direct | Mar 29, 2012 (2d) |
| Feb 2, 2012 | AFFY | ↓ Sell10b5-1 | 18,000 | $10.00 | $180K | Direct | Feb 6, 2012 (4d) |
| Aug 18, 2011 | AFFY | ↓ Sell | 12,000 | $4.55 | $55K | Direct | Aug 18, 2011 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
About John A Orwin's insider trades
John A Orwin is President & CEO at Atreca (BCEL). Since Aug 18, 2011, John has reported 4 open-market purchases worth $298K and 20 sales worth $8.6M on SEC Form 4. There have been no open-market trades in the last 12 months.
12 sales (55% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (58 filings), option exercises (24 filings), shares returned to the company (6 filings), shares withheld for taxes (3 filings). 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 BCEL insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.