Comparable stake leader
BAKER BROS. ADVISORS LP
SEC ownership of GRAIL, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001699031.
Disclosed value leader
PRIMECAP MANAGEMENT CO/CA/
Comparable rows
9/50
Latest evidence
15 Oct 2026
- Public ticker
- GRAL on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BAKER BROS. ADVISORS LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
9 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BAKER BROS. ADVISORS LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
15 Oct 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001699031
- Issuer location
- Sunnyvale, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GRAIL, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BAKER BROS. ADVISORS LP
Disclosed value leader
PRIMECAP MANAGEMENT CO/CA/
Comparable rows
9/50
Latest evidence
15 Oct 2026
13F
13D/G
3/4/5
Lead comparable stake: 9.8%
41 rows are not safely comparable across share classes.
13D/G row: BAKER BROS. ADVISORS LP
Showing 1-8 of 50 holder rows.
Quick read
BAKER BROS. ADVISORS LP leads the comparable SEC ownership view at 9.8%.
9 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BAKER BROS. ADVISORS LP's linked filing trail.
Comparable ownership
Top 5
BAKER BROS. ADVISORS LP
9.8%
FARALLON CAPITAL MANAGEMENT, L.L.C.
9.6%
BlackRock, Inc.
7.9%
Farallon Capital Partners, L.P.
7.8%
STATE STREET CORP
5.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BAKER BROS. ADVISORS LP |
13F
13D/G
Company
|
9.8%
Reported 13D/G
· 31 Mar 2026
|
$275,033,478
4,028,614 shares
|
— | 30 Jun 2026 |
| FARALLON CAPITAL MANAGEMENT, L.L.C. |
13F
13D/G
Company
|
9.6%
Reported 13D/G
· 30 Jun 2026
|
$284,111,340
4,161,584 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
7.9%
Reported 13D/G
· 30 Jun 2026
|
$244,206,968
3,577,075 shares
|
— | 30 Jun 2026 |
| Farallon Capital Partners, L.P. |
13D/G
Dapice Joshua J.
|
7.8%
Reported 13D/G
· 31 Mar 2026
|
$148,465,601
3,253,684 shares
|
+$41,568,930 | 31 Mar 2026 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
5.6%
Reported 13D/G
· 30 Jun 2026
|
$162,859,041
2,385,514 shares
|
— | 30 Jun 2026 |
| PRIMECAP MANAGEMENT CO/CA/ |
13D/G
13F
Company
|
5.1%
Reported 13D/G
· 30 Jun 2026
|
$1,488,355,362
21,801,016 shares
|
+$1,362,828,406 | 30 Jun 2026 |
| CRCM LP |
13D/G
|
5%
Reported 13D/G
· 06 Oct 2025
|
$106,472,314
1,800,651 shares
|
-$2,483,456 | 06 Oct 2025 |
| Sessa Capital (Master), L.P. |
13D/G
|
4.3%
Reported 13D/G
· 30 Apr 2025
|
$56,839,422
1,508,077 shares
|
$0 | 30 Apr 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$117,981,280.
Buys
$0
Insiders: 0
Sells
$117,981,280
Insiders: 5
Net
-$117,981,280
Shares: -1,521,399
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 1,521,399
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 129,944 | $0 | $14,832,793 | -$14,832,793 |
| 3-6 | 0 | 1,491 | $0 | $91,070 | -$91,070 |
| 6-9 | 0 | 310,267 | $0 | $15,484,662 | -$15,484,662 |
| 9-12 | 0 | 1,079,697 | $0 | $87,572,755 | -$87,572,755 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-12 of 12 reporting-owner rows connected to GRAIL, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
ILLUMINA, INC.
Net 12M change
-$117.98M
Full value: -$117,981,280 · USD · 12-month changeLatest report
15 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| ILLUMINA, INC. | 10%+ Owner | $279,644,761 | -$79,850,000 | -22% | Filing P/S | 17 Nov 2025 |
| Chun R. Ding | 10%+ Owner | $166,079,013 | Filing P/S | 01 Jul 2025 | ||
| Joshua J. Ofman | Chief Executive Officer, Director | $47,502,559 | -$14,576,665 | -23% | Filing P/S | 15 Oct 2026 |
| Aaron Freidin | Chief Financial Officer | $32,991,035 | -$10,045,895 | -23% | Filing P/S | 05 Oct 2026 |
| Robert P. Ragusa | Chief Executive Officer, Director | $25,886,368 | -$12,265,121 | -32% | Filing P/S | 08 Apr 2026 |
| Andrew John Partridge | Chief Growth Officer | $22,817,077 | -$1,243,599 | -5.2% | Filing P/S | 05 Oct 2026 |
| Gregory L. Summe | Director | $6,432,769 | Median | 15 Oct 2026 | ||
| William J. Chase | Director | $6,043,515 | Median | 15 Oct 2026 | ||
| Steven C. Mizell | Director | $6,022,077 | Median | 15 Oct 2026 | ||
| Sarah Krevans | Director | $2,203,015 | Mixed | 18 Jun 2026 | ||
| Ankur Dhingra | Director | Mixed | 11 Jun 2024 | |||
| Charles Dadswell | Director | Mixed | 11 Jun 2024 |
Recent insider transactions for GRAIL, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Gregory L. Summe | GRAL | Common Stock | Award | 0.52% | 237 | 45,909 | 15 Oct 2026 | Direct | ||
| William J. Chase | GRAL | Common Stock | Award | 0.36% | 153 | 43,131 | 15 Oct 2026 | Direct | ||
| Joshua J. Ofman | GRAL | Common Stock | Sale | -5.52% | -$2,736,945 | $136.85 | -20,000 | 342,271 | 15 Oct 2026 | Direct |
| Steven Mizell | GRAL | Common Stock | Award | 0.35% | 148 | 42,978 | 15 Oct 2026 | Direct | ||
| Andrew John Partridge | GRAL | Common Stock | Sale | -4.81% | -$1,152,528 | $146.39 | -7,873 | 155,865 | 05 Oct 2026 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -9.49% | -$3,457,585 | $146.39 | -23,619 | 225,364 | 05 Oct 2026 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -1.62% | -$382,679 | $93.34 | -4,100 | 248,983 | 21 Sep 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -14.5% | -$6,006,378 | $97.74 | -61,452 | 362,271 | 21 Sep 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Options Exercise | 6.66% | 26,452 | 423,723 | 21 Sep 2026 | Direct | ||
| Joshua J. Ofman | GRAL | Stock Option | Options Exercise | -41.7% | -26,452 | 37,032 | 21 Sep 2026 | Direct | ||
| Joshua J. Ofman | GRAL | Common Stock | Sale | -1.24% | -$425,098 | $85.02 | -5,000 | 397,271 | 27 Aug 2026 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -3.03% | -$671,579 | $85.01 | -7,900 | 253,083 | 27 Aug 2026 | Direct |
| William J. Chase | GRAL | Common Stock | Award | 0.65% | 276 | 42,978 | 15 Jul 2026 | Direct | ||
| Gregory L. Summe | GRAL | Common Stock | Award | 0.94% | 427 | 45,672 | 15 Jul 2026 | Direct | ||
| Steven Mizell | GRAL | Common Stock | Award | 0.63% | 268 | 42,830 | 15 Jul 2026 | Direct | ||
| William J. Chase | GRAL | Common Stock | Award | 14.8% | 5,491 | 42,702 | 18 Jun 2026 | Direct | ||
| Steven Mizell | GRAL | Common Stock | Award | 14.8% | 5,491 | 42,562 | 18 Jun 2026 | Direct | ||
| Gregory L. Summe | GRAL | Common Stock | Award | 13.8% | 5,491 | 45,245 | 18 Jun 2026 | Direct | ||
| Sarah Krevans | GRAL | Common Stock | Award | 14.8% | 5,491 | 42,628 | 18 Jun 2026 | Direct | ||
| Andrew John Partridge | GRAL | Common Stock | Sale | -0.9% | -$91,070 | $61.08 | -1,491 | 163,738 | 04 Jun 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Award | 0.79% | 3,154 | 402,271 | 03 Jun 2026 | Direct | ||
| Joshua J. Ofman | GRAL | Common Stock | Award | 7.52% | 27,901 | 399,117 | 01 Jun 2026 | Direct | ||
| Steven Mizell | GRAL | Common Stock | Award | 1.08% | 396 | 37,071 | 15 Apr 2026 | Direct | ||
| William J. Chase | GRAL | Common Stock | Award | 1.11% | 408 | 37,211 | 15 Apr 2026 | Direct | ||
| Gregory L. Summe | GRAL | Common Stock | Award | 1.61% | 631 | 39,754 | 15 Apr 2026 | Direct | ||
| Aaron Freidin | GRAL | Common Stock | Sale | -15% | -$2,286,526 | $49.92 | -45,806 | 260,669 | 08 Apr 2026 | Direct |
| Robert P. Ragusa | GRAL | Common Stock | Sale | -19.2% | -$6,164,923 | $49.92 | -123,502 | 518,582 | 08 Apr 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -14.2% | -$3,078,169 | $49.92 | -61,665 | 371,216 | 08 Apr 2026 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -0.81% | -$119,340 | $47.89 | -2,492 | 306,475 | 09 Mar 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -0.67% | -$140,650 | $47.89 | -2,937 | 432,881 | 09 Mar 2026 | Direct |
| Robert P. Ragusa | GRAL | Common Stock | Sale | -1.15% | -$357,296 | $47.89 | -7,461 | 642,084 | 09 Mar 2026 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -0.21% | -$34,722 | $53.01 | -655 | 308,967 | 05 Mar 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -0.16% | -$36,577 | $53.01 | -690 | 435,818 | 05 Mar 2026 | Direct |
| Robert P. Ragusa | GRAL | Common Stock | Sale | -0.15% | -$51,950 | $53.01 | -980 | 649,545 | 05 Mar 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -3.75% | -$852,848 | $50.16 | -17,002 | 436,508 | 02 Mar 2026 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -3% | -$480,244 | $50.17 | -9,573 | 309,622 | 02 Mar 2026 | Direct |
| Robert P. Ragusa | GRAL | Common Stock | Sale | -5.45% | -$1,881,417 | $50.17 | -37,504 | 650,525 | 02 Mar 2026 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Award | 22.9% | 84,540 | 453,510 | 27 Feb 2026 | Direct | ||
| Aaron Freidin | GRAL | Common Stock | Award | 23.2% | 60,118 | 319,195 | 27 Feb 2026 | Direct | ||
| William J. Chase | GRAL | Common Stock | Award | 0.58% | 213 | 36,803 | 15 Jan 2026 | Direct | ||
| Gregory L. Summe | GRAL | Common Stock | Award | 0.85% | 329 | 39,123 | 15 Jan 2026 | Direct | ||
| Steven Mizell | GRAL | Common Stock | Award | 0.56% | 206 | 36,675 | 15 Jan 2026 | Direct | ||
| Joshua J. Ofman | GRAL | Common Stock | Sale | -3.4% | -$1,300,000 | $100.00 | -13,000 | 368,818 | 03 Dec 2025 | Direct |
| Robert P. Ragusa | GRAL | Common Stock | Sale | -5.49% | -$3,809,535 | $95.24 | -40,000 | 688,029 | 03 Dec 2025 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -8.8% | -$2,478,818 | $99.15 | -25,000 | 259,077 | 03 Dec 2025 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -0.59% | -$134,402 | $79.20 | -1,697 | 284,077 | 17 Nov 2025 | Direct |
| Illumina, Inc. | GRAL | Common stock, par value $0.001 per share | Sale | -22.2% | -$79,850,000 | $79.85 | -1,000,000 | 3,502,126 | 17 Nov 2025 | Direct |
* marks a reported price that did not pass the local price check.