Keith Katkin
Insider
First SEC filing: April 5, 2022 · Latest: April 5, 2022
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-128,183
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 30, 2026 | EBS | A | 25,344 | · | · | 111,775 Direct | +29.32% | Acquired | (price as of 2026-10-02) |
| April 30, 2026 | EBS | S 10b5-1 | 15,481 | $8.28 | $128,183 | 96,294 Direct | -13.85% | Disposed | -23.6% (price as of 2026-10-02) |
| April 30, 2026 | EBS | A | 11,296 | · | · | 11,296 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 4, 2026 | SNDX | A | 24,000 | · | · | 124,000 Direct | +24.00% | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2026 | ELDN | M | 8,575 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 10, 2026 | ELDN | M | 8,575 | · | · | 8,575 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2025 | EBS | S 10b5-1 | 7,844 | $6.30 | $49,417 | 86,431 Direct | -8.32% | Disposed | 0.5% (price as of 2026-10-02) |
| May 19, 2025 | SNDX | P | 10,000 | $9.11 | $91,100 | 100,000 Direct | +11.11% | Acquired | 93.2% (price as of 2026-10-02) |
| April 30, 2025 | EBS | A | 34,403 | · | · | 94,275 Direct | +57.46% | Acquired | (price as of 2026-10-02) |
| April 30, 2025 | EBS | A | 15,824 | · | · | 41,572 Direct | +61.46% | Acquired | (price as of 2026-10-02) |
| Feb. 5, 2025 | SNDX | A | 25,000 | · | · | 90,000 Direct | +38.46% | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2025 | ELDN | A | 8,575 | · | · | 8,575 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2025 | ELDN | A | 77,175 | · | · | 77,175 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2024 | EBS | A | 17,430 | · | · | 59,872 Direct | +41.07% | Acquired | (price as of 2026-10-02) |
| May 23, 2024 | EBS | A | 25,748 | · | · | 25,748 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 7, 2024 | SNDX | A | 17,000 | · | · | 65,000 Direct | +35.42% | Acquired | (price as of 2026-10-02) |
| May 25, 2023 | EBS | A | 33,847 | · | · | 42,442 Direct | +393.80% | Acquired | (price as of 2026-10-02) |
| May 1, 2023 | ELDN | A | 752,185 | · | · | 752,185 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 2, 2023 | SNDX | A | 16,000 | · | · | 48,000 Direct | +50.00% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2023 | ELDN | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 6, 2022 | SNDX | M | 20,782 | $7.88 | $163,762 | 52,782 Direct | +64.94% | Acquired | 123.4% (price as of 2026-10-02) |
| Oct. 6, 2022 | SNDX | S 10b5-1 | 20,782 | $25.90 | $538,254 | 32,000 Direct | -39.37% | Disposed | -32.0% (price as of 2026-10-02) |
| Oct. 6, 2022 | SNDX | M | 9,117 | $8.93 | $81,415 | 41,117 Direct | +28.49% | Acquired | 97.1% (price as of 2026-10-02) |
| Oct. 6, 2022 | SNDX | S 10b5-1 | 9,117 | $25.90 | $236,130 | 32,000 Direct | -22.17% | Disposed | -32.0% (price as of 2026-10-02) |
| Oct. 6, 2022 | SNDX | M | 9,117 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 6, 2022 | SNDX | M | 20,782 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 4, 2022 | SNDX | M | 137 | $7.88 | $1,080 | 32,137 Direct | +0.43% | Acquired | 123.4% (price as of 2026-10-02) |
| Oct. 4, 2022 | SNDX | S 10b5-1 | 137 | $25.00 | $3,425 | 32,000 Direct | -0.43% | Disposed | -29.6% (price as of 2026-10-02) |
| Oct. 4, 2022 | SNDX | M | 223 | $8.93 | $1,991 | 32,223 Direct | +0.70% | Acquired | 97.1% (price as of 2026-10-02) |
| Oct. 4, 2022 | SNDX | S 10b5-1 | 223 | $25.00 | $5,575 | 32,000 Direct | -0.69% | Disposed | -29.6% (price as of 2026-10-02) |
| Oct. 4, 2022 | SNDX | M | 223 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 4, 2022 | SNDX | M | 137 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 3, 2022 | SNDX | M | 167 | $7.88 | $1,316 | 32,167 Direct | +0.52% | Acquired | 123.4% (price as of 2026-10-02) |
| Oct. 3, 2022 | SNDX | S 10b5-1 | 167 | $25.00 | $4,175 | 32,000 Direct | -0.52% | Disposed | -29.6% (price as of 2026-10-02) |
| Oct. 3, 2022 | SNDX | M | 13 | $8.93 | $116 | 32,013 Direct | +0.04% | Acquired | 97.1% (price as of 2026-10-02) |
| Oct. 3, 2022 | SNDX | S 10b5-1 | 13 | $25.00 | $325 | 32,000 Direct | -0.04% | Disposed | -29.6% (price as of 2026-10-02) |
| Oct. 3, 2022 | SNDX | M | 13 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 3, 2022 | SNDX | M | 167 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 30, 2022 | SNDX | M | 2,914 | $7.88 | $22,962 | 34,914 Direct | +9.11% | Acquired | 123.4% (price as of 2026-10-02) |
| Sept. 30, 2022 | SNDX | S 10b5-1 | 2,914 | $25.07 | $73,054 | 32,000 Direct | -8.35% | Disposed | -29.8% (price as of 2026-10-02) |
| Sept. 30, 2022 | SNDX | M | 647 | $8.93 | $5,778 | 32,647 Direct | +2.02% | Acquired | 97.1% (price as of 2026-10-02) |
| Sept. 30, 2022 | SNDX | S 10b5-1 | 647 | $25.07 | $16,220 | 32,000 Direct | -1.98% | Disposed | -29.8% (price as of 2026-10-02) |
| Sept. 30, 2022 | SNDX | M | 647 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 30, 2022 | SNDX | M | 2,914 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 2, 2022 | EBS | A | 8,595 | · | · | 8,595 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 2, 2022 | SNDX | A | 16,000 | · | · | 32,000 Direct | +100.00% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2022 | ELDN | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 19, 2021 | RIGL | A | 30,000 | · | · | 30,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 19, 2021 | RIGL | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 3, 2021 | SNDX | A | 16,000 | · | · | 16,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Sept. 11, 2020 | ELDN | A | 5,907 | · | · | 5,907 Direct | · | Acquired | (price as of 2026-10-02) |
| May 15, 2020 | RIGL | A | 55,000 | · | · | 55,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 12, 2020 | SNDX | A | 24,000 | · | · | 24,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 11, 2019 | ELDN | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 10, 2019 | SNDX | A | 24,000 | · | · | 24,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2019 | RIGL | A | 55,000 | · | · | 55,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 13, 2018 | ELDN | A | 9,100 | · | · | 9,100 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2018 | SNDX | A | 14,000 | · | · | 14,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 17, 2018 | RIGL | A | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2018 | SNDX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 30, 2017 | ELDN | A | 36,000 | · | · | 36,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 17, 2017 | SNDX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 12, 2017 | RIGL | A | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 29, 2017 | SNDX | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 11, 2016 | RIGL | A | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 29, 2015 | RIGL | A | 80,000 | · | · | 80,000 Direct | · | Acquired | (price as of 2026-10-02) |
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 |
|---|---|---|---|---|---|---|---|
| April 30, 2026 | EBS | Stock Options (Right to Buy) | Common Stock | $7.99 | April 30, 2033 | 11,296 | Acquired |
| Jan. 10, 2026 | ELDN | Restricted Stock Units | Common Stock | · | · | 8,575 | Disposed |
| April 30, 2025 | EBS | Stock Option (Right to Buy) | Common Stock | $5.45 | April 29, 2032 | 15,824 | Acquired |
| Jan. 10, 2025 | ELDN | Restricted Stock Units | Common Stock | · | · | 8,575 | Acquired |
| Jan. 10, 2025 | ELDN | Stock Option (right to buy) | Common Stock | $4.04 | Jan. 10, 2035 | 77,175 | Acquired |
| May 23, 2024 | EBS | Stock Option (Right to Buy) | Common Stock | $5.02 | May 22, 2031 | 25,748 | Acquired |
| May 1, 2023 | ELDN | Stock Option (right to buy) | Common Stock | $2.30 | May 1, 2033 | 752,185 | Acquired |
| Feb. 1, 2023 | ELDN | Stock Option (right to buy) | Common Stock | $3.08 | Feb. 1, 2033 | 20,000 | Acquired |
| Oct. 6, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $8.93 | May 23, 2028 | 9,117 | Disposed |
| Oct. 6, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $7.88 | June 10, 2029 | 20,782 | Disposed |
| Oct. 4, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $8.93 | May 23, 2028 | 223 | Disposed |
| Oct. 4, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $7.88 | June 10, 2029 | 137 | Disposed |
| Oct. 3, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $8.93 | May 23, 2028 | 13 | Disposed |
| Oct. 3, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $7.88 | June 10, 2029 | 167 | Disposed |
| Sept. 30, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $8.93 | May 23, 2028 | 647 | Disposed |
| Sept. 30, 2022 | SNDX | Stock Options (Right to buy) | Common Stock | $7.88 | June 10, 2029 | 2,914 | Disposed |
| Feb. 1, 2022 | ELDN | Stock Option (right to buy) | Common Stock | $3.97 | Feb. 1, 2032 | 20,000 | Acquired |
| May 19, 2021 | RIGL | Stock Option (Right to Buy) | Common Stock | $3.64 | May 19, 2031 | 30,000 | Acquired |
| Sept. 11, 2020 | ELDN | Stock Option (Right to Buy) | Series X1 Convertible Preferred Stock [F2] | $500.00 | Sept. 11, 2030 | 5,907 | Acquired |
| May 15, 2020 | RIGL | Stock Option (Right to Buy) | Common Stock | $1.76 | May 15, 2030 | 55,000 | Acquired |
| Feb. 12, 2020 | SNDX | Stock Option (Right to Buy) | Common Stock | $9.47 | Feb. 12, 2030 | 24,000 | Acquired |
| July 11, 2019 | ELDN | Stock Option (Right to Buy) | Common Stock | $0.88 | July 11, 2029 | 20,000 | Acquired |
| June 10, 2019 | SNDX | Stock Option (Right to Buy) | Common Stock | $7.88 | June 10, 2029 | 24,000 | Acquired |
| May 23, 2019 | RIGL | Stock Option (Right to Buy) | Common Stock | $2.02 | May 23, 2029 | 55,000 | Acquired |
| June 13, 2018 | ELDN | Stock Option (Right to Buy) | Common Stock | $6.18 | June 13, 2028 | 9,100 | Acquired |
| May 23, 2018 | SNDX | Stock Option (Right to Buy) | Common Stock | $8.93 | May 23, 2028 | 14,000 | Acquired |
| May 17, 2018 | RIGL | Stock Option (Right to Buy) | Common Stock | $3.98 | May 17, 2028 | 40,000 | Acquired |
| Feb. 8, 2018 | SNDX | Stock Option (Right to Buy) | Common Stock | $9.63 | Feb. 8, 2028 | 10,000 | Acquired |
| June 30, 2017 | ELDN | Stock Option (Right to Buy) | Common Stock | $5.85 | June 30, 2027 | 36,000 | Acquired |
| May 17, 2017 | SNDX | Stock Option (Right to Buy) | Common Stock | $13.58 | May 17, 2027 | 10,000 | Acquired |
| May 12, 2017 | RIGL | Stock Option (Right to Buy) | Common Stock | $2.61 | May 12, 2027 | 40,000 | Acquired |
| March 29, 2017 | SNDX | Stock Option (Right to Buy) | Common Stock | $13.78 | March 29, 2027 | 25,000 | Acquired |
| May 11, 2016 | RIGL | Stock Option (Right to Buy) | Common Stock | $2.40 | May 11, 2026 | 40,000 | Acquired |
| June 29, 2015 | RIGL | Stock Option (Right to Buy) | Common Stock | $3.26 | June 29, 2025 | 80,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.