Data spanning the past 90 days through February 07, 2026 reveals that Grail's three principal insider shareholders consist of TenPercentOwner Inc. Illumina, (3.50Mn shares), TenPercentOwner Chun R Ding (3.31Mn shares), Chief Executive Officer Robert P Ragusa (688.03K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Inc. Illumina, | 3,502,126 | 18 Nov, 2025 | |
| Chun R Ding | 3,305,055 | 03 Jul, 2025 | |
| Robert P Ragusa | Chief Executive Officer | 688,029 | 05 Dec, 2025 |
| Joshua J. Ofman | President | 368,818 | 05 Dec, 2025 |
| Aaron Freidin | Chief Financial Officer | 259,077 | 05 Dec, 2025 |
| Gregory L Summe | 39,123 | 16 Jan, 2026 | |
| Sarah Krevans | 37,137 | 30 May, 2025 | |
| William J Chase | 36,803 | 16 Jan, 2026 | |
| Steven Mizell | 36,675 | 16 Jan, 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 |
|---|---|---|---|---|---|---|---|---|
| 15 Jan, 2026 | Gregory L Summe | Common Stock | A | 329 | $97.44 | 39,123 | D | A |
| 15 Jan, 2026 | Steven Mizell | Common Stock | A | 206 | $97.44 | 36,675 | D | A |
| 15 Jan, 2026 | William J Chase | Common Stock | A | 213 | $97.44 | 36,803 | D | A |
| 03 Dec, 2025 | Robert P Ragusa | - | - | 688,029 | D | |||
| 03 Dec, 2025 | Robert P Ragusa | - | - | 697,866 | D | |||
| 03 Dec, 2025 | Robert P Ragusa | Common Stock | D | 14,807 | $94.43 | 713,222 | D | S |
| 03 Dec, 2025 | Robert P Ragusa | - | - | 689,633 | D | |||
| 03 Dec, 2025 | Robert P Ragusa | Common Stock | D | 1,604 | $97.28 | 688,029 | D | S |
| 03 Dec, 2025 | Robert P Ragusa | Common Stock | D | 8,233 | $96.22 | 689,633 | D | S |
| 03 Dec, 2025 | Robert P Ragusa | Common Stock | D | 15,356 | $95.28 | 697,866 | D | S |
| 03 Dec, 2025 | Joshua J. Ofman | Common Stock | D | 13,000 | $100.00 | 368,818 | D | S |
| 03 Dec, 2025 | Aaron Freidin | Common Stock | D | 25,000 | $99.15 | 259,077 | D | S |
| 17 Nov, 2025 | Inc. Illumina, | Common stock, par value $0.001 per share | D | 1,000,000 | $79.85 | 3,502,126 | D | S |
| 17 Nov, 2025 | Inc. Illumina, | - | - | 3,502,126 | D | |||
| 17 Nov, 2025 | Aaron Freidin | Common Stock | D | 1,697 | $79.20 | 284,077 | D | S |
| 16 Oct, 2025 | Joshua J. Ofman | Common Stock | D | 6,114 | $82.01 | 381,818 | D | S |
| 16 Oct, 2025 | Joshua J. Ofman | - | - | 381,818 | D | |||
| 15 Oct, 2025 | Gregory L Summe | Common Stock | A | 425 | $75.52 | 38,794 | D | A |
| 15 Oct, 2025 | Steven Mizell | Common Stock | A | 267 | $75.52 | 36,469 | D | A |
| 15 Oct, 2025 | Robert P Ragusa | - | - | 727,388 | D |