GLSI's three largest insider shareholders as of September 29, 2026 are Snehal Patel (Ceo And Cfo, 5.61Mn shares), Snehal Patel (Ceo And Cfo, 2.71Mn shares), David Mcwilliams (Director, 620.30K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Snehal Patel | Ceo And Cfo | 5,611,402 | 0 | 5,611,402 | 80.4% | 30 Jul, 2026 |
| 2 | David Mcwilliams | Director | 620,301 | 0 | 620,301 | 8.9% | 15 Dec, 2021 |
| 3 | Kenneth Hallock | Director | 397,304 | 0 | 397,304 | 5.7% | 24 Jan, 2022 |
| 4 | Jaye Thompson | Vp Clinical Reg Affairs | 264,148 | 0 | 264,148 | 3.8% | 25 Nov, 2024 |
| 5 | Frank Joseph Daugherty | Chief Medical Officer | 90,121 | 0 | 90,121 | 1.3% | 26 Apr, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 28 Jul, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 1,500 | $13.59 | $20.39K | 5,610,702 | Direct |
| 29 Jul, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 700 | $13.10 | $9.17K | 5,611,402 | Direct |
| 27 Jul, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 1,500 | $13.62 | $20.43K | 5,609,202 | Direct |
| 23 Jul, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 2,500 | $13.14 | $32.85K | 5,606,602 | Direct |
| 24 Jul, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 1,100 | $12.88 | $14.17K | 5,607,702 | Direct |
| 13 Jan, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 1,800 | $29.83 | $53.69K | 5,604,102 | Direct |
| 12 Jan, 2026 | Snehal Patel | Ceo And Cfo | Acquired P | 2,900 | $27.54 | $79.87K | 5,602,302 | Direct |
| 31 Dec, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 4,300 | $21.36 | $91.85K | 5,599,402 | Direct |
| 30 Dec, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 2,900 | $21.73 | $63.02K | 5,595,102 | Direct |
| 18 Dec, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 4,100 | $12.62 | $51.74K | 5,592,202 | Direct |
| 25 Nov, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 4,600 | $8.37 | $38.50K | 5,588,102 | Direct |
| 13 Nov, 2025 | Snehal Patel | Ceo And Cfo | Acquired A | 100,000 | $0.00 | $0 | 2,347,462 | Direct |
| 07 Nov, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 10,600 | $8.43 | $89.36K | 5,583,502 | Direct |
| 31 Oct, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 2,300 | $9.26 | $21.30K | 5,572,902 | Direct |
| 25 Apr, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 3,600 | $9.88 | $35.57K | 5,570,602 | Direct |
| 17 Apr, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 5,400 | $8.98 | $48.49K | 5,567,002 | Direct |
| 07 Apr, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 3,600 | $9.10 | $32.76K | 5,561,602 | Direct |
| 04 Apr, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 5,500 | $8.73 | $48.02K | 5,558,002 | Direct |
| 10 Jan, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 2,500 | $12.51 | $31.28K | 5,552,502 | Direct |
| 06 Jan, 2025 | Snehal Patel | Ceo And Cfo | Acquired P | 1,100 | $13.31 | $14.64K | 5,548,202 | Direct |