Mark J Foley
Insider
First SEC filing: June 17, 2019 · Latest: June 17, 2019
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 |
|---|---|---|---|---|---|---|---|---|---|
| May 28, 2026 | GKOS | A | 2,987 | · | · | 2,987 Direct | · | Acquired | (price as of 2026-10-05) |
| May 28, 2026 | GKOS | A | 2,987 | · | · | 2,987 Direct | · | Acquired | (price as of 2026-10-05) |
| May 28, 2026 | GKOS | A | 1,878 | · | · | 60,267 Direct | +3.22% | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2026 | GKOS | A | 1,168 | · | · | 58,389 Direct | +2.04% | Acquired | (price as of 2026-10-05) |
| May 29, 2025 | GKOS | A | 2,108 | · | · | 57,221 Direct | +3.82% | Acquired | (price as of 2026-10-05) |
| May 29, 2025 | GKOS | A | 3,149 | · | · | 3,149 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 26, 2025 | GKOS | M | 25,000 | $32.00 | $800,000 | 59,936 Direct | +71.56% | Acquired | 412.5% (price as of 2026-10-05) |
| Feb. 26, 2025 | GKOS | M | 15,000 | $24.69 | $370,350 | 74,936 Direct | +25.03% | Acquired | 564.3% (price as of 2026-10-05) |
| Feb. 26, 2025 | GKOS | S | 20,687 | $120.72 | $2,497,335 | 54,249 Direct | -27.61% | Disposed | 35.9% (price as of 2026-10-05) |
| Feb. 26, 2025 | GKOS | M | 25,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Feb. 26, 2025 | GKOS | M | 15,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 2, 2025 | GKOS | A | 864 | · | · | 35,800 Direct | +2.47% | Acquired | (price as of 2026-10-05) |
| May 30, 2024 | GKOS | A | 1,716 | · | · | 34,936 Direct | +5.17% | Acquired | (price as of 2026-10-05) |
| May 30, 2024 | GKOS | A | 1,246 | · | · | 1,246 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 23, 2024 | GKOS | M | 10,000 | $7.28 | $72,800 | 37,780 Direct | +36.00% | Acquired | 2152.9% (price as of 2026-10-05) |
| Feb. 23, 2024 | GKOS | S | 4,560 | $92.87 | $423,487 | 33,220 Direct | -12.07% | Disposed | 76.6% (price as of 2026-10-05) |
| Feb. 23, 2024 | GKOS | M | 10,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 1, 2023 | GKOS | A | 3,230 | · | · | 27,780 Direct | +13.16% | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2023 | GKOS | A | 2,948 | · | · | 24,550 Direct | +13.65% | Acquired | (price as of 2026-10-05) |
| June 2, 2022 | GKOS | A | 4,364 | · | · | 21,602 Direct | +25.32% | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2022 | GKOS | A | 2,486 | · | · | 17,238 Direct | +16.85% | Acquired | (price as of 2026-10-05) |
| June 3, 2021 | GKOS | A | 2,382 | · | · | 14,752 Direct | +19.26% | Acquired | (price as of 2026-10-05) |
| Jan. 4, 2021 | GKOS | A | 1,184 | · | · | 12,370 Direct | +10.58% | Acquired | (price as of 2026-10-05) |
| June 16, 2020 | SIBN | A | 8,797 | · | · | 8,797 Direct | · | Acquired | (price as of 2026-10-05) |
| June 3, 2020 | GKOS | A | 3,900 | · | · | 11,186 Direct | +53.53% | Acquired | (price as of 2026-10-05) |
| June 13, 2019 | SIBN | A | 26,236 | · | · | 26,236 Direct | · | Acquired | (price as of 2026-10-05) |
| May 30, 2019 | GKOS | A | 2,653 | · | · | 7,286 Direct | +57.26% | Acquired | (price as of 2026-10-05) |
| May 31, 2018 | GKOS | A | 4,633 | · | · | 4,633 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 13, 2017 | GKOS | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 2, 2016 | GKOS | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| July 23, 2015 | GKOS | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
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 |
|---|---|---|---|---|---|---|---|
| May 28, 2026 | GKOS | Stock Option (Right to Buy) | Common Stock | · | May 28, 2036 | 2,987 | Acquired |
| May 28, 2026 | GKOS | Stock Option (Right to Buy) | Common Stock | $53.57 | May 28, 2036 | 2,987 | Acquired |
| May 29, 2025 | GKOS | Stock Option (Right to Buy) | Common Stock | $94.87 | May 29, 2035 | 3,149 | Acquired |
| Feb. 26, 2025 | GKOS | Stock Option (Right to Buy) | Common Stock | $32.00 | July 23, 2025 | 25,000 | Disposed |
| Feb. 26, 2025 | GKOS | Stock Option (Right to Buy) | Common Stock | $24.69 | June 2, 2026 | 15,000 | Disposed |
| May 30, 2024 | GKOS | Stock Option (Right to Buy) | Common Stock | $110.70 | May 30, 2034 | 1,246 | Acquired |
| Feb. 23, 2024 | GKOS | Stock Option (Right to Buy) | Common Stock | $7.28 | July 10, 2024 | 10,000 | Disposed |
| June 13, 2019 | SIBN | Stock Options (Right to buy) | Common Stock | $17.72 | June 12, 2029 | 26,236 | Acquired |
| Dec. 13, 2017 | GKOS | Stock option (right to buy) | Common Stock | $25.77 | Dec. 13, 2027 | 15,000 | Acquired |
| June 2, 2016 | GKOS | Stock option (right to buy) | Common Stock | $24.69 | June 2, 2026 | 15,000 | Acquired |
| July 23, 2015 | GKOS | Stock option (right to buy) | Common Stock | $32.00 | July 23, 2025 | 25,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.