Michael Kauffman
CIK 1364719 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 5, 2013 · Latest: Feb. 12, 2016
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-85,500
+ 76 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
76 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 21, 2025 | VSTM | S 10b5-1 | 8,550 | $10.00 | $85,500 | 8,666 Direct | -49.66% | Disposed | -28.9% (price as of 2026-08-20) |
| June 5, 2024 | ACET | S | 5,900 | $1.43 | $8,437 | 5,900 Direct | -50.00% | Disposed | -57.8% (price as of 2026-08-20) |
| Feb. 28, 2022 | KPTI | S | 6,226 | $10.24 | $63,754 | 898,131 Indirect | -0.69% | Disposed | -98.7% (price as of 2026-08-20) |
| Feb. 28, 2022 | KPTI | S | 6,226 | $10.24 | $63,754 | 713,757 Direct | -0.86% | Disposed | -98.7% (price as of 2026-08-20) |
| Feb. 17, 2022 | KPTI | S | 9,079 | $12.12 | $110,037 | 698,983 Direct | -1.28% | Disposed | -98.9% (price as of 2026-08-20) |
| Feb. 17, 2022 | KPTI | S | 9,088 | $12.12 | $110,147 | 904,357 Indirect | -0.99% | Disposed | -98.9% (price as of 2026-08-20) |
| Feb. 7, 2022 | KPTI | S | 6,707 | $9.86 | $66,131 | 913,445 Indirect | -0.73% | Disposed | -98.7% (price as of 2026-08-20) |
| Feb. 7, 2022 | KPTI | S | 6,764 | $9.86 | $66,693 | 708,062 Direct | -0.95% | Disposed | -98.7% (price as of 2026-08-20) |
| March 18, 2021 | KPTI | S 10b5-1 | 4,000 | $12.39 | $49,560 | 714,826 Direct | -0.56% | Disposed | -99.0% (price as of 2026-08-20) |
| Feb. 18, 2021 | KPTI | S | 9,495 | $14.83 | $140,811 | 776,452 Indirect | -1.21% | Disposed | -99.1% (price as of 2026-08-20) |
| Feb. 18, 2021 | KPTI | S | 9,495 | $14.83 | $140,811 | 575,126 Direct | -1.62% | Disposed | -99.1% (price as of 2026-08-20) |
| Feb. 11, 2021 | KPTI | S | 6,642 | $15.52 | $103,084 | 764,147 Indirect | -0.86% | Disposed | -99.2% (price as of 2026-08-20) |
| Feb. 11, 2021 | KPTI | S | 6,601 | $15.52 | $102,448 | 562,821 Direct | -1.16% | Disposed | -99.2% (price as of 2026-08-20) |
| Oct. 12, 2020 | KPTI | S 10b5-1 | 7,500 | $14.89 | $111,675 | 756,489 Indirect | -0.98% | Disposed | -99.1% (price as of 2026-08-20) |
| Aug. 17, 2020 | KPTI | S 10b5-1 | 1,477 | $15.00 | $22,155 | 756,489 Indirect | -0.19% | Disposed | -99.1% (price as of 2026-08-20) |
| July 15, 2020 | KPTI | S 10b5-1 | 7,500 | $19.43 | $145,725 | 756,489 Indirect | -0.98% | Disposed | -99.3% (price as of 2026-08-20) |
| July 10, 2020 | KPTI | S 10b5-1 | 300 | $19.71 | $5,913 | 555,122 Direct | -0.05% | Disposed | -99.4% (price as of 2026-08-20) |
| July 10, 2020 | KPTI | S 10b5-1 | 7,200 | $18.98 | $136,656 | 555,422 Direct | -1.28% | Disposed | -99.3% (price as of 2026-08-20) |
| July 9, 2020 | KPTI | S 10b5-1 | 7,500 | $19.53 | $146,475 | 756,489 Indirect | -0.98% | Disposed | -99.3% (price as of 2026-08-20) |
| June 22, 2020 | KPTI | S 10b5-1 | 7,500 | $20.00 | $150,000 | 756,489 Indirect | -0.98% | Disposed | -99.4% (price as of 2026-08-20) |
| June 15, 2020 | KPTI | S 10b5-1 | 357 | $16.20 | $5,783 | 756,489 Indirect | -0.05% | Disposed | -99.2% (price as of 2026-08-20) |
| June 15, 2020 | KPTI | S 10b5-1 | 7,143 | $16.38 | $117,002 | 756,489 Indirect | -0.94% | Disposed | -99.2% (price as of 2026-08-20) |
| June 10, 2020 | KPTI | S 10b5-1 | 7,500 | $18.13 | $135,975 | 555,122 Direct | -1.33% | Disposed | -99.3% (price as of 2026-08-20) |
| June 9, 2020 | KPTI | S 10b5-1 | 7,500 | $18.50 | $138,750 | 756,489 Indirect | -0.98% | Disposed | -99.3% (price as of 2026-08-20) |
Showing latest 100 of 293 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 12, 2026 | KYNB | Stock Option (Right to Buy) | Common Stock (7,000) | $7.13 | June 11, 2036 | 7,000 | Acquired |
| Jan. 6, 2026 | VSTM | Stock Option (right to buy) | Common Stock (200,000) | $6.88 | Jan. 6, 2036 | 200,000 | Acquired |
| May 22, 2025 | VSTM | Stock Option (right to buy) | Common Stock (12,500) | $7.48 | May 22, 2035 | 12,500 | Acquired |
| Aug. 21, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (26,400) | — | May 31, 2033 | 26,400 | Acquired |
| Aug. 21, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (26,400) | $2.14 | May 31, 2033 | 26,400 | Disposed |
| Aug. 21, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (18,500) | — | June 1, 2032 | 18,500 | Acquired |
| Aug. 21, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (18,500) | $2.14 | June 1, 2032 | 18,500 | Disposed |
| Aug. 21, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (37,000) | — | Nov. 16, 2031 | 37,000 | Acquired |
| Aug. 21, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (37,000) | $2.14 | Nov. 16, 2031 | 37,000 | Disposed |
| June 18, 2024 | VSTM | Stock Option (right to buy) | Common Stock (12,500) | $3.27 | June 18, 2034 | 12,500 | Acquired |
| June 5, 2024 | ACET | Stock Option (Right to Buy) | Common Stock (26,400) | $1.44 | June 4, 2034 | 26,400 | Acquired |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (16,078) | $11.44 | March 11, 2034 | 16,078 | Acquired |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $49.92 | June 28, 2031 | 2,083 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $21.24 | June 16, 2030 | 2,083 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $21.72 | June 21, 2029 | 2,083 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $67.08 | June 11, 2028 | 2,083 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $25.08 | June 13, 2027 | 2,083 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $16.44 | June 13, 2026 | 2,083 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (1,497) | $95.88 | June 11, 2025 | 1,497 | Disposed |
| March 11, 2024 | VSTM | Stock Option (right to buy) | Common Stock (2,083) | $120.84 | June 10, 2024 | 2,083 | Disposed |
| Aug. 14, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (26,400) | — | May 31, 2033 | 26,400 | Acquired |
| Aug. 14, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (26,400) | $5.20 | May 31, 2033 | 26,400 | Disposed |
| Aug. 14, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (18,500) | — | June 1, 2032 | 18,500 | Acquired |
| Aug. 14, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (18,500) | $11.49 | June 1, 2032 | 18,500 | Disposed |
| Aug. 14, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (37,000) | — | Nov. 16, 2031 | 37,000 | Acquired |
| Aug. 14, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (37,000) | $9.39 | Nov. 16, 2031 | 37,000 | Disposed |
| June 1, 2023 | ACET | Stock Option (Right to Buy) | Common Stock (26,400) | $5.20 | May 31, 2033 | 26,400 | Acquired |
| May 15, 2023 | VSTM | Stock Option (right to buy) | Common Stock (62,500) | $0.42 | May 15, 2033 | 62,500 | Acquired |
| June 22, 2022 | VSTM | Stock Option (right to buy) | Common Stock (62,500) | $1.11 | June 22, 2032 | 62,500 | Acquired |
| June 2, 2022 | ACET | Stock Option (Right to Buy) | Common stock (18,500) | $11.49 | June 1, 2032 | 18,500 | Acquired |
| May 12, 2022 | VSTM | Stock Option (right to buy) [F1] | Common Stock (62,500) | $1.07 | May 12, 2032 | 62,500 | Acquired |
| Feb. 28, 2022 | KPTI | Stock Option (right to buy) | Common Stock (27,000) | $10.33 | Feb. 27, 2032 | 27,000 | Acquired |
| Nov. 17, 2021 | ACET | Stock Option (right to Buy) | Common Stock (37,000) | $9.39 | Nov. 16, 2031 | 37,000 | Acquired |
| June 28, 2021 | VSTM | Stock Option (right to buy) | Common Stock (25,000) | $4.16 | June 28, 2031 | 25,000 | Acquired |
| Feb. 25, 2021 | KPTI | Stock Option (right to buy) | Common Stock (153,500) | $14.56 | Feb. 24, 2031 | 153,500 | Acquired |
| Feb. 25, 2021 | KPTI | Stock Option (right to buy) | Common Stock (153,500) | $14.56 | Feb. 24, 2031 | 153,500 | Acquired |
| Feb. 15, 2021 | KPTI | Restricted Stock Units | Common Stock (21,800) | — | — | 21,800 | Disposed |
| Feb. 15, 2021 | KPTI | Restricted Stock Units | Common Stock (21,800) | — | — | 21,800 | Disposed |
| Feb. 5, 2021 | KPTI | Restricted Stock Units | Common Stock (14,300) | — | — | 14,300 | Disposed |
| Feb. 5, 2021 | KPTI | Restricted Stock Units | Common Stock (14,300) | — | — | 14,300 | Disposed |
| Oct. 12, 2020 | KPTI | Stock Option (right to buy) | Common Stock (6,076) | $0.03 | Oct. 31, 2020 | 6,076 | Disposed |
| Oct. 12, 2020 | KPTI | Stock Option (right to buy) | Common Stock (1,424) | $0.03 | Oct. 31, 2020 | 1,424 | Disposed |
| Aug. 17, 2020 | KPTI | Stock Option (right to buy) | Common Stock (1,477) | $0.03 | Oct. 31, 2020 | 1,477 | Disposed |
| July 15, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $0.03 | Oct. 31, 2020 | 7,500 | Disposed |
| July 10, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $4.75 | Sept. 2, 2023 | 7,500 | Disposed |
| July 9, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $4.75 | Sept. 2, 2023 | 7,500 | Disposed |
| June 22, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $0.03 | Oct. 31, 2020 | 7,500 | Disposed |
| June 16, 2020 | VSTM | Stock Option (Right to Buy) | Common Stock (25,000) | $1.77 | June 16, 2030 | 25,000 | Acquired |
| June 15, 2020 | KPTI | Stock Option (right to buy) | Common Stock (357) | $0.03 | Oct. 21, 2020 | 357 | Disposed |
| June 15, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,143) | $0.03 | Oct. 31, 2020 | 7,143 | Disposed |
| June 10, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $4.75 | Sept. 2, 2023 | 7,500 | Disposed |
| June 9, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $4.75 | Sept. 2, 2023 | 7,500 | Disposed |
| May 18, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $0.03 | Oct. 21, 2020 | 7,500 | Disposed |
| May 15, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $0.03 | Oct. 21, 2020 | 7,500 | Disposed |
| May 7, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $4.75 | Sept. 2, 2023 | 7,500 | Disposed |
| May 7, 2020 | KPTI | Stock Option (right to buy) | Common Stock (7,500) | $4.75 | Sept. 2, 2023 | 7,500 | Disposed |
| April 9, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| April 8, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| March 10, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| March 9, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Feb. 11, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Feb. 10, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Feb. 5, 2020 | KPTI | Restricted Stock Units | Common Stock (57,200) | — | — | 57,200 | Acquired |
| Feb. 5, 2020 | KPTI | Restricted Stock Units | Common Stock (57,200) | — | — | 57,200 | Acquired |
| Feb. 5, 2020 | KPTI | Stock Option (right to buy) | Common Stock (153,500) | $18.00 | Feb. 4, 2030 | 153,500 | Acquired |
| Feb. 5, 2020 | KPTI | Stock Option (right to buy) | Common Stock (153,500) | $18.00 | Feb. 4, 2030 | 153,500 | Acquired |
| Jan. 9, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Jan. 8, 2020 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Dec. 10, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Dec. 9, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Nov. 11, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Nov. 8, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Nov. 1, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Nov. 1, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Sept. 16, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Sept. 16, 2019 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| June 21, 2019 | VSTM | Stock Option (Right to Buy) | Common Stock (25,000) | $1.81 | June 21, 2029 | 25,000 | Acquired |
| Feb. 15, 2019 | KPTI | Restricted Stock Units | Common Stock (87,200) | — | — | 87,200 | Acquired |
| Feb. 15, 2019 | KPTI | Restricted Stock Units | Common Stock (87,200) | — | — | 87,200 | Acquired |
| Feb. 15, 2019 | KPTI | Stock Option (right to buy) | Common Stock (231,200) | $9.21 | Feb. 14, 2029 | 231,200 | Acquired |
| Feb. 15, 2019 | KPTI | Stock Option (right to buy) | Common Stock (231,200) | $9.21 | Feb. 14, 2029 | 231,200 | Acquired |
| Jan. 7, 2019 | KPTI | Stock Option (right to buy) | Common Stock (12,500) | $0.03 | Oct. 21, 2020 | 12,500 | Disposed |
| Dec. 7, 2018 | KPTI | Stock Option (right to buy) | Common Stock (12,500) | $0.03 | Oct. 21, 2020 | 12,500 | Disposed |
| Nov. 26, 2018 | KPTI | Stock Option (right to buy) | Common Stock (9,600) | $4.75 | Sept. 2, 2023 | 9,600 | Disposed |
| Nov. 19, 2018 | KPTI | Stock Option (right to buy) | Common Stock (400) | $4.75 | Sept. 2, 2023 | 400 | Disposed |
| Nov. 7, 2018 | KPTI | Stock Option (right to buy) | Common Stock (12,500) | $0.03 | Oct. 21, 2020 | 12,500 | Disposed |
| Oct. 18, 2018 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Oct. 8, 2018 | KPTI | Stock Option (right to buy) | Common Stock (10,736) | $0.03 | Oct. 21, 2020 | 10,736 | Disposed |
| Oct. 8, 2018 | KPTI | Stock Option (right to buy) | Common Stock (1,764) | $0.03 | Oct. 21, 2020 | 1,764 | Disposed |
| Sept. 18, 2018 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Sept. 7, 2018 | KPTI | Stock Option (right to buy) | Common Stock (12,500) | $0.03 | Oct. 21, 2020 | 12,500 | Disposed |
| Aug. 20, 2018 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $4.75 | Sept. 2, 2023 | 10,000 | Disposed |
| Aug. 7, 2018 | KPTI | Stock Option (right to buy) | Common Stock (12,500) | $0.03 | Oct. 21, 2020 | 12,500 | Disposed |
| July 18, 2018 | KPTI | Stock Option (right to buy) | Common Stock (4,242) | $4.75 | Sept. 2, 2023 | 4,242 | Disposed |
| July 18, 2018 | KPTI | Stock Option (right to buy) | Common Stock (5,757) | $0.26 | Dec. 13, 2021 | 5,757 | Disposed |
| July 18, 2018 | KPTI | Stock Option (right to buy) | Common Stock (1) | $0.03 | Dec. 31, 2020 | 1 | Disposed |
| July 9, 2018 | KPTI | Stock Option (right to buy) | Common Stock (12,500) | $0.03 | Oct. 21, 2020 | 12,500 | Disposed |
| June 18, 2018 | KPTI | Stock Option (right to buy) | Common Stock (10,000) | $0.26 | Dec. 13, 2021 | 10,000 | Disposed |
| June 7, 2018 | KPTI | Stock Option (right to buy) | Common Stock (303) | $0.03 | Nov. 1, 2020 | 303 | Disposed |
| June 7, 2018 | KPTI | Stock Option (right to buy) | Common Stock (9,697) | $0.26 | Dec. 15, 2021 | 9,697 | Disposed |
Showing latest 100 of 131 transactions
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 11 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 5, 2013 | KPTI | Common Stock | 620,771 | Direct |
| Nov. 5, 2013 | KPTI | Common Stock | 1,001,713 | Indirect |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Direct |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Direct |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Direct |
| Nov. 5, 2013 | KPTI | Series A Convertible Preferred Stock→ Common Stock | — | Direct |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Indirect |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Indirect |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Indirect |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Indirect |
| Nov. 5, 2013 | KPTI | Stock Option (right to buy)→ Common Stock | — | Indirect |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2021 | $474,375 | — | $832,832 | $1,507,217 | $237,188 | — | $17,977 | $3,069,589 |
| 2020 | $625,624 | — | — | — | $348,750 | — | $11,880 | $3,937,039 |
| 2019 | $566,500 | — | — | — | $363,693 | — | $11,860 | $3,231,504 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.