Michael Kauffman insider trades: Verastem (VSTM) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Michael reports to the SEC
and 5 more companies
Open-market buys and sales
80 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 21, 2025 | VSTM | ↓ Sell10b5-1 | 8,550 | $10.00 | $86K | Direct | Nov 25, 2025 (4d) |
| Jun 5, 2024 | ACET | ↓ Sell | 5,900 | $1.43 | $8K | Direct | Jun 7, 2024 (2d) |
| Feb 28, 2022 | KPTI | ↓ Sell | 6,226 | $10.24 | $64K | By Spouse | Mar 2, 2022 (2d) |
| Feb 28, 2022 | KPTI | ↓ Sell | 6,226 | $10.24 | $64K | Direct | Mar 2, 2022 (2d) |
| Feb 17, 2022 | KPTI | ↓ Sell | 9,088 | $12.12 | $110K | By Spouse | Feb 22, 2022 (5d) |
| Feb 17, 2022 | KPTI | ↓ Sell | 9,079 | $12.12 | $110K | Direct | Feb 22, 2022 (5d) |
| Feb 7, 2022 | KPTI | ↓ Sell | 6,764 | $9.86 | $67K | Direct | Feb 9, 2022 (2d) |
| Feb 7, 2022 | KPTI | ↓ Sell | 6,707 | $9.86 | $66K | By Spouse | Feb 9, 2022 (2d) |
| Jan 3, 2022 | KZR | ↓ Sell | 5,000 | $16.45 | $82K | Direct | Jan 5, 2022 (2d) |
| Mar 18, 2021 | KPTI | ↓ Sell | 4,000 | $12.39 | $50K | Direct | Mar 23, 2021 (5d) |
| Feb 18, 2021 | KPTI | ↓ Sell | 9,495 | $14.83 | $141K | By Spouse | Feb 22, 2021 (4d) |
| Feb 18, 2021 | KPTI | ↓ Sell | 9,495 | $14.83 | $141K | Direct | Feb 22, 2021 (4d) |
| Feb 11, 2021 | KPTI | ↓ Sell | 6,642 | $15.52 | $103K | By Spouse | Feb 17, 2021 (6d) |
| Feb 11, 2021 | KPTI | ↓ Sell | 6,601 | $15.52 | $102K | Direct | Feb 17, 2021 (6d) |
| Oct 12, 2020 | KPTI | ↓ Sell | 7,500 | $14.89 | $112K | By Spouse | Oct 14, 2020 (2d) |
| Aug 17, 2020 | KPTI | ↓ Sell | 1,477 | $15.00 | $22K | By Spouse | Aug 18, 2020 (1d) |
| Jul 15, 2020 | KPTI | ↓ Sell | 7,500 | $19.43 | $146K | By Spouse | Jul 17, 2020 (2d) |
| Jul 10, 2020 | KPTI | ↓ Sell | 7,500 | $19.01 | $143K | Direct | Jul 13, 2020 (3d) |
| Jul 9, 2020 | KPTI | ↓ Sell | 7,500 | $19.53 | $146K | By Spouse | Jul 13, 2020 (4d) |
| Jun 22, 2020 | KPTI | ↓ Sell | 7,500 | $20.00 | $150K | By Spouse | Jun 24, 2020 (2d) |
| Jun 15, 2020 | KPTI | ↓ Sell | 7,500 | $16.37 | $123K | By Spouse | Jun 17, 2020 (2d) |
| Jun 10, 2020 | KPTI | ↓ Sell | 7,500 | $18.13 | $136K | Direct | Jun 11, 2020 (1d) |
| Jun 9, 2020 | KPTI | ↓ Sell | 7,500 | $18.50 | $139K | By Spouse | Jun 11, 2020 (2d) |
| May 18, 2020 | KPTI | ↓ Sell | 15,000 | $19.32 | $290K | By Spouse | May 19, 2020 (1d) |
| May 7, 2020 | KPTI | ↓ Sell | 7,500 | $19.63 | $147K | Direct | May 11, 2020 (4d) |
| May 7, 2020 | KPTI | ↓ Sell | 7,500 | $19.63 | $147K | By Spouse | May 11, 2020 (4d) |
| Apr 9, 2020 | KPTI | ↓ Sell | 10,000 | $20.64 | $206K | Direct | Apr 10, 2020 (1d) |
| Apr 8, 2020 | KPTI | ↓ Sell | 10,000 | $18.61 | $186K | By Spouse | Apr 10, 2020 (2d) |
| Mar 10, 2020 | KPTI | ↓ Sell | 10,000 | $22.22 | $222K | Direct | Mar 11, 2020 (1d) |
| Mar 9, 2020 | KPTI | ↓ Sell | 10,000 | $22.52 | $225K | By Spouse | Mar 11, 2020 (2d) |
| Feb 19, 2020 | KPTI | ↓ Sell | 8,817 | $16.48 | $145K | Direct | Feb 21, 2020 (2d) |
| Feb 19, 2020 | KPTI | ↓ Sell | 8,817 | $16.48 | $145K | By Spouse | Feb 21, 2020 (2d) |
| Feb 11, 2020 | KPTI | ↓ Sell | 10,000 | $17.43 | $174K | Direct | Feb 12, 2020 (1d) |
| Feb 10, 2020 | KPTI | ↓ Sell | 10,000 | $16.93 | $169K | By Spouse | Feb 12, 2020 (2d) |
| Jan 9, 2020 | KPTI | ↓ Sell | 10,000 | $19.19 | $192K | Direct | Jan 10, 2020 (1d) |
| Jan 8, 2020 | KPTI | ↓ Sell | 10,000 | $18.57 | $186K | By Spouse | Jan 10, 2020 (2d) |
| Dec 10, 2019 | KPTI | ↓ Sell | 10,000 | $15.99 | $160K | Direct | Dec 11, 2019 (1d) |
| Dec 9, 2019 | KPTI | ↓ Sell | 10,000 | $17.02 | $170K | By Spouse | Dec 11, 2019 (2d) |
| Nov 11, 2019 | KPTI | ↓ Sell | 10,000 | $14.76 | $148K | Direct | Nov 12, 2019 (1d) |
| Nov 8, 2019 | KPTI | ↓ Sell | 10,000 | $14.63 | $146K | By Spouse | Nov 12, 2019 (4d) |
| Nov 1, 2019 | KPTI | ↓ Sell | 10,000 | $12.00 | $120K | Direct | Nov 5, 2019 (4d) |
| Nov 1, 2019 | KPTI | ↓ Sell | 10,000 | $12.00 | $120K | By Spouse | Nov 5, 2019 (4d) |
| Sep 16, 2019 | KPTI | ↓ Sell | 10,000 | $12.00 | $120K | Direct | Sep 17, 2019 (1d) |
| Sep 16, 2019 | KPTI | ↓ Sell | 10,000 | $12.00 | $120K | By Spouse | Sep 17, 2019 (1d) |
| Jan 7, 2019 | KPTI | ↓ Sell | 12,500 | $10.23 | $128K | By Spouse | Jan 9, 2019 (2d) |
| Dec 7, 2018 | KPTI | ↓ Sell | 12,500 | $10.11 | $126K | By Spouse | Dec 10, 2018 (3d) |
| Nov 26, 2018 | KPTI | ↓ Sell | 9,600 | $11.00 | $106K | Direct | Nov 27, 2018 (1d) |
| Nov 19, 2018 | KPTI | ↓ Sell | 400 | $11.14 | $4K | Direct | Nov 21, 2018 (2d) |
| Nov 7, 2018 | KPTI | ↓ Sell | 12,500 | $11.65 | $146K | By Spouse | Nov 9, 2018 (2d) |
| Oct 18, 2018 | KPTI | ↓ Sell | 10,000 | $12.63 | $126K | Direct | Oct 22, 2018 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other VSTM insiders
Open-market trades in the last 12 months
About Michael Kauffman's insider trades
Michael Kauffman is President of Development at Verastem (VSTM). Since Jun 17, 2014, Michael has reported 2 open-market purchases worth $57K and 78 sales worth $20.9M on SEC Form 4. In the last 12 months: 1 sale ($86K).
1 sale (0% of the value sold) was made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so it says little about how the insider sees the stock today.
Their filings also include grants and awards (55 filings), option exercises (48 filings), shares returned to the company (5 filings), gifts (2 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 VSTM insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.