GRAL's three largest insider shareholders as of September 17, 2026 are Inc. Illumina, (TenPercentOwner, 3.50Mn shares), Chun R Ding (TenPercentOwner, 3.31Mn shares), Robert P Ragusa (Chief Executive Officer, 518.58K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Inc. Illumina, | TenPercentOwner | 3,502,126 | 0 | 3,502,126 | 42.1% | 18 Nov, 2025 |
| 2 | Chun R Ding | TenPercentOwner | 0 | 3,305,055 | 3,305,055 | 39.8% | 03 Jul, 2025 |
| 3 | Robert P Ragusa | Chief Executive Officer | 518,582 | 0 | 518,582 | 6.2% | 09 Apr, 2026 |
| 4 | Joshua J. Ofman | Chief Executive Officer | 397,271 | 0 | 397,271 | 4.8% | 31 Aug, 2026 |
| 5 | Aaron Freidin | Chief Financial Officer | 253,083 | 0 | 253,083 | 3.0% | 31 Aug, 2026 |
| 6 | Andrew John Partridge | Chief Growth Officer | 163,738 | 0 | 163,738 | 2.0% | 05 Jun, 2026 |
| 7 | Gregory L Summe | Director | 45,672 | 0 | 45,672 | 0.5% | 16 Jul, 2026 |
| 8 | William J Chase | Director | 42,978 | 0 | 42,978 | 0.5% | 16 Jul, 2026 |
| 9 | Steven Mizell | Director | 42,830 | 0 | 42,830 | 0.5% | 16 Jul, 2026 |
| 10 | Sarah Krevans | Director | 42,628 | 0 | 42,628 | 0.5% | 22 Jun, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 27 Aug, 2026 | Joshua J. Ofman | Chief Executive Officer | Disposed S | 5,000 | $85.02 | $425.10K | 397,271 | Direct |
| 27 Aug, 2026 | Aaron Freidin | Chief Financial Officer | Disposed S | 7,900 | $85.01 | $671.58K | 253,083 | Direct |
| 15 Jul, 2026 | Steven Mizell | Director | Acquired A | 268 | $74.36 | $19.93K | 42,830 | Direct |
| 15 Jul, 2026 | Gregory L Summe | Director | Acquired A | 427 | $74.36 | $31.75K | 45,672 | Direct |
| 15 Jul, 2026 | William J Chase | Director | Acquired A | 276 | $74.36 | $20.52K | 42,978 | Direct |
| 18 Jun, 2026 | Gregory L Summe | Director | Acquired A | 5,491 | $63.74 | $350.00K | 45,245 | Direct |
| 18 Jun, 2026 | William J Chase | Director | Acquired A | 5,491 | $63.74 | $350.00K | 42,702 | Direct |
| 18 Jun, 2026 | Sarah Krevans | Director | Acquired A | 5,491 | $63.74 | $350.00K | 42,628 | Direct |
| 18 Jun, 2026 | Steven Mizell | Director | Acquired A | 5,491 | $63.74 | $350.00K | 42,562 | Direct |
| 04 Jun, 2026 | Andrew John Partridge | Chief Growth Officer | Disposed S | 1,491 | $61.08 | $91.07K | 163,738 | Direct |
| 01 Jun, 2026 | Joshua J. Ofman | Chief Executive Officer | Acquired A | 27,901 | $64.40 | $1.80Mn | 399,117 | Direct |
| 03 Jun, 2026 | Joshua J. Ofman | Chief Executive Officer | Acquired A | 3,154 | $61.13 | $192.80K | 402,271 | Direct |
| 15 Apr, 2026 | Gregory L Summe | Director | Acquired A | 631 | $49.79 | $31.42K | 39,754 | Direct |
| 15 Apr, 2026 | William J Chase | Director | Acquired A | 408 | $49.79 | $20.31K | 37,211 | Direct |
| 15 Apr, 2026 | Steven Mizell | Director | Acquired A | 396 | $49.79 | $19.72K | 37,071 | Direct |
| 08 Apr, 2026 | Robert P Ragusa | Chief Executive Officer | Disposed S | 123,502 | $49.92 | $6.16Mn | 518,582 | Direct |
| 08 Apr, 2026 | Aaron Freidin | Chief Financial Officer | Disposed S | 45,806 | $49.92 | $2.29Mn | 260,669 | Direct |
| 08 Apr, 2026 | Joshua J. Ofman | President | Disposed S | 61,665 | $49.92 | $3.08Mn | 371,216 | Direct |
| 05 Mar, 2026 | Joshua J. Ofman | President | Disposed S | 690 | $53.01 | $36.58K | 435,818 | Direct |
| 05 Mar, 2026 | Robert P Ragusa | Chief Executive Officer | Disposed S | 980 | $53.01 | $51.95K | 649,545 | Direct |