HROW's three largest insider shareholders as of March 23, 2026 are Mark L Baum (Chief Executive Officer, 2.99Mn shares), Andrew R. Boll (President And Cfo, 811.18K shares), John P. Saharek (Ceo President, Imprimisrx, 467.39K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Mark L Baum | Chief Executive Officer | 2,986,130 | 0 | 16 Dec, 2025 |
| Andrew R. Boll | President And Cfo | 811,179 | 0 | 16 Dec, 2025 |
| John P. Saharek | Ceo President, Imprimisrx | 467,388 | 0 | 07 Apr, 2025 |
| Management Inc. Opaleye | 0 | 59,428 | 05 Mar, 2026 | |
| Martin A. Makary | 45,000 | 0 | 15 Aug, 2023 | |
| Richard L Md Lindstrom | 0 | 26,100 | 03 Oct, 2022 | |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Mar, 2026 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | D | 59,000 | $39.15 | 3,756,000 | I | S |
| 03 Mar, 2026 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | D | 1,309 | $39.15 | 63,691 | I | S |
| 04 Mar, 2026 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | D | 134,000 | $39.67 | 3,622,000 | I | S |
| 04 Mar, 2026 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | D | 4,263 | $39.67 | 59,428 | I | S |
| 27 Feb, 2026 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | D | 5,000 | $54.18 | 65,000 | I | S |
| 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 |
| 06 Jan, 2026 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | D | 20,000 | $53.35 | 70,000 | I | S |
| 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 | A | 180,000 | $3.95 | 3,066,124 | D | M |
| 12 Dec, 2025 | Andrew R. Boll | Common Stock | D | 26,665 | $47.06 | 811,179 | D | F |
| 12 Dec, 2025 | Mark L Baum | Common Stock | D | 79,994 | $47.06 | 2,986,130 | 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 | Mark L Baum | RSU | A | 889,500 | $0.00 | 889,500 | D | A |
| 01 Jul, 2025 | Andrew R. Boll | RSU | A | 405,750 | $0.00 | 405,750 | D | A |