Harrow's three largest insider shareholders as of May 14, 2026 are Mark L Baum (Chief Executive Officer, 2.99Mn shares), Mark L Baum (Chief Executive Officer, 2.89Mn shares), Andrew R. Boll (President And Cfo, 811.18K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Mark L Baum | Chief Executive Officer | 2,986,130 | 0 | 16 Dec, 2025 |
| Mark L Baum | Chief Executive Officer | 2,886,124 | 0 | 23 Jul, 2025 |
| Andrew R. Boll | President And Cfo | 811,179 | 0 | 16 Dec, 2025 |
| Andrew R. Boll | Chief Financial Officer | 568,089 | 0 | 21 Feb, 2024 |
| John P. Saharek | Ceo President, Imprimisrx | 467,388 | 0 | 07 Apr, 2025 |
| John P. Saharek | Ceo Of Imprimisrx | 299,663 | 0 | 13 Sep, 2024 |
| Martin A. Makary | - | 45,000 | 0 | 15 Aug, 2023 |
| Horn R. Lawrence Van | - | 1,860 | 0 | 23 Dec, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 30 Jan, 2026 | Patrick William Sullivan | RSU | A | 25,000 | $0.00 | 25,000 | D | A |
| 30 Jan, 2026 | Patrick William Sullivan | RSU | A | 15,000 | $0.00 | 15,000 | D | A |
| 12 Dec, 2025 | Mark L Baum | Common Stock | A | 180,000 | $3.95 | 3,066,124 | D | M |
| 12 Dec, 2025 | Andrew R. Boll | Common Stock | A | 60,000 | $3.95 | 837,844 | D | M |
| 12 Dec, 2025 | Mark L Baum | Common Stock | D | 79,994 | $47.06 | 2,986,130 | D | F |
| 12 Dec, 2025 | Andrew R. Boll | Common Stock | D | 26,665 | $47.06 | 811,179 | D | F |
| 12 Dec, 2025 | Mark L Baum | Stock Option (Right to Buy) | D | 180,000 | $0.00 | 0 | D | M |
| 12 Dec, 2025 | Andrew R. Boll | Stock Option (Right to Buy) | D | 60,000 | $0.00 | 0 | D | M |
| 01 Sep, 2025 | Randall E. Pollard | Stock Option (Right to Buy) | A | 30,000 | $0.00 | 30,000 | D | A |
| 21 Jul, 2025 | Mark L Baum | Common stock | A | 600,000 | $7.87 | 3,199,462 | D | M |
| 21 Jul, 2025 | Mark L Baum | Common stock | D | 313,338 | $37.08 | 2,886,124 | D | F |
| 31 Jul, 2015 | Mark L Baum | Stock Option (Right to Buy) | D | 600,000 | $0.00 | 0 | D | M |
| 01 Jul, 2025 | Andrew R. Boll | RSU | A | 405,750 | $0.00 | 405,750 | D | A |
| 01 Jul, 2025 | Mark L Baum | RSU | A | 889,500 | $0.00 | 889,500 | D | A |
| 20 Jun, 2025 | Lauren P Silvernail | RSU | A | 7,339 | $0.00 | 7,339 | D | A |
| 20 Jun, 2025 | Perry J. Sternberg | RSU | A | 7,339 | $0.00 | 7,339 | D | A |
| 20 Jun, 2025 | Adrienne L Graves | RSU | A | 7,339 | $0.00 | 7,339 | D | A |
| 03 Apr, 2025 | John P. Saharek | Common Stock | A | 277,200 | $0.00 | 576,863 | D | M |
| 03 Apr, 2025 | Mark L Baum | Common Stock | A | 762,300 | $0.00 | 2,899,825 | D | M |
| 03 Apr, 2025 | Andrew R. Boll | Common Stock | A | 346,500 | $0.00 | 914,589 | D | M |