ARQT's three largest insider shareholders as of August 04, 2026 are Patrick J Heron (Director, 8.79Mn shares), Life Sciences Viii, L.P. Frazier (TenPercentOwner, 8.76Mn shares), Bhaskar Chaudhuri (Director, 867.83K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Advisors Llc Orbimed | - | 0 | 415,142 | 28 Jun, 2022 |
| David W Osborne | Chief Technical Officer | 268,854 | 0 | 08 Mar, 2023 |
| Joseph L Turner | - | 4,312 | 0 | 03 Jun, 2022 |
| Patrick J Heron | - | 0 | 8,785,284 | 06 Mar, 2024 |
| Keith R Leonard | - | 22,123 | 0 | 04 Mar, 2026 |
| Bhaskar Chaudhuri | - | 867,826 | 0 | 16 Jun, 2025 |
| John W Smither | Chief Financial Officer | 11,365 | 0 | 15 Feb, 2024 |
| Halley E Gilbert | - | 22,123 | 0 | 21 Nov, 2025 |
| Amit Munshi | - | 4,021 | 0 | 08 Dec, 2025 |
| Life Sciences Viii, L.P. Frazier | - | 8,764,232 | 0 | 26 Oct, 2023 |
| Terrie Curran | - | 17,748 | 0 | 16 Jun, 2025 |
| David Joseph Topper | Chief Financial Officer | 182,774 | 0 | 03 Apr, 2025 |
| Patrick Burnett | - | 80,651 | 0 | 04 Feb, 2026 |
| Masaru Matsuda | See Remark | 136,932 | 0 | 03 Mar, 2026 |
| Patricia A. Turney | Svp, Operations | 62,862 | 0 | 08 Mar, 2023 |
| Kenneth A. Lock | Chief Commercial Officer | 63,429 | 0 | 08 Mar, 2023 |
| Howard G. Welgus | Chief Medical Officer | 39,744 | 0 | 03 Apr, 2026 |
| Todd Watanabe | President And Ceo | 785,957 | 0 | 03 Mar, 2026 |
| Matthew Richard Moore | Svp And Chief Business Officer | 145,505 | 0 | 03 May, 2024 |
| Scott L Burrows | Chief Financial Officer | 59,115 | 0 | 08 Mar, 2023 |
| Neha Krishnamohan | - | 22,123 | 0 | 17 Nov, 2025 |
| Sue-Jean Lin | - | 26,735 | 0 | 25 Nov, 2025 |
| Larry Todd Edwards | Svp Chief Commercial Officer | 175,178 | 0 | 03 Mar, 2026 |
| Latha Vairavan | Svp Chief Financial Officer | 87,754 | 0 | 03 Mar, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Apr, 2026 | Howard G. Welgus | Common Stock | D | 10,000 | $23.88 | 39,744 | D | S |
| 01 Apr, 2026 | Howard G. Welgus | Common Stock | D | 10,000 | $23.88 | 39,744 | D | S |
| 01 Apr, 2026 | Howard G. Welgus | Common Stock | D | 10,000 | $23.88 | 39,744 | D | S |
| 02 Mar, 2026 | Howard G. Welgus | Common Stock | D | 10,000 | $25.65 | 49,744 | D | S |
| 02 Mar, 2026 | Howard G. Welgus | Common Stock | D | 10,000 | $25.65 | 49,744 | D | S |
| 02 Mar, 2026 | Keith R Leonard | Common Stock | A | 27,052 | $8.63 | 49,175 | D | M |
| 02 Mar, 2026 | Howard G. Welgus | Common Stock | D | 10,000 | $25.65 | 49,744 | D | S |
| 02 Mar, 2026 | Keith R Leonard | Common Stock | A | 12,220 | $7.51 | 61,395 | D | M |
| 02 Mar, 2026 | Keith R Leonard | Common Stock | D | 39,272 | $25.39 | 22,123 | D | S |
| 02 Mar, 2026 | Keith R Leonard | Stock Option (right to buy) | D | 27,052 | $0.00 | 0 | D | M |
| 02 Mar, 2026 | Keith R Leonard | Stock Option (right to buy) | D | 12,220 | $0.00 | 0 | D | M |
| 27 Feb, 2026 | Masaru Matsuda | Common Stock | A | 37,000 | $0.00 | 147,003 | D | A |
| 27 Feb, 2026 | Latha Vairavan | Common Stock | A | 27,000 | $0.00 | 90,607 | D | A |
| 27 Feb, 2026 | Masaru Matsuda | Common Stock | A | 37,000 | $0.00 | 147,003 | D | A |
| 27 Feb, 2026 | Larry Todd Edwards | Common Stock | A | 30,000 | $0.00 | 178,865 | D | A |
| 27 Feb, 2026 | Larry Todd Edwards | Common Stock | A | 30,000 | $0.00 | 178,865 | D | A |
| 27 Feb, 2026 | Latha Vairavan | Common Stock | A | 27,000 | $0.00 | 90,607 | D | A |
| 27 Feb, 2026 | Todd Watanabe | Common Stock | A | 102,000 | $0.00 | 823,306 | D | A |
| 27 Feb, 2026 | Todd Watanabe | Common Stock | A | 102,000 | $0.00 | 823,306 | D | A |
| 27 Feb, 2026 | Todd Watanabe | Common Stock | A | 102,000 | $0.00 | 823,306 | D | A |