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
ILLUMINA, INC.
Comparable rows
50/50
Latest evidence
18 Jun 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
-
50 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
-
18 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001699031
- Issuer location
- Menlo Park, 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
ILLUMINA, INC.
Comparable rows
50/50
Latest evidence
18 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 9.8%
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%.
50 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 Partners, L.P.
7.8%
BlackRock, Inc.
6.5%
CRCM LP
5%
PRIMECAP MANAGEMENT CO/CA/
4.7%
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%
from 13D/G
|
$208,198,772
4,028,614 shares
|
— | 31 Mar 2026 |
| Farallon Capital Partners, L.P. |
13D/G
Dapice Joshua J.
|
7.8%
|
$148,465,601
3,253,684 shares
|
+$41,568,930 | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.5%
from 13D/G
|
$153,413,957
2,968,536 shares
|
— | 31 Mar 2026 |
| CRCM LP |
13D/G
|
5%
|
$106,472,314
1,800,651 shares
|
-$2,483,456 | 06 Oct 2025 |
| PRIMECAP MANAGEMENT CO/CA/ |
13D/G
13F
Company
|
4.7%
|
$184,052,268
1,838,684 shares
|
-$21,862,340 | 31 Dec 2025 |
| Sessa Capital (Master), L.P. |
13D/G
|
4.3%
|
$56,839,422
1,508,077 shares
|
$0 | 30 Apr 2025 |
| ILLUMINA, INC. |
3/4/5
13D/G
10%+ Owner
|
3.2%
from 13D/G
|
$279,644,761
3,502,126 shares
|
-$79,850,000 | 17 Nov 2025 |
| Chun R. Ding |
3/4/5
10%+ Owner
|
8%
|
$166,079,013
3,305,055 shares
|
-$16,830,151 | 01 Jul 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: -$128,337,583.
Buys
$0
Insiders: 0
Sells
$128,337,583
Insiders: 6
Net
-$128,337,583
Shares: -1,867,321
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 1,867,321
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 232,464 | $0 | $11,620,688 | -$11,620,688 |
| 3-6 | 0 | 79,294 | $0 | $3,955,044 | -$3,955,044 |
| 6-9 | 0 | 1,192,992 | $0 | $94,953,646 | -$94,953,646 |
| 9-12 | 0 | 362,571 | $0 | $17,808,205 | -$17,808,205 |
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
-$128,337,582
Latest report
18 Jun 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 | -$16,830,151 | -9.2% | Filing P/S | 01 Jul 2025 |
| Robert P. Ragusa | Chief Executive Officer, Director | $25,886,368 | -$12,763,744 | -33% | Filing P/S | 08 Apr 2026 |
| Joshua J. Ofman | Chief Executive Officer, Director | $20,789,365 | -$12,929,044 | -38% | Median | 01 Jun 2026 |
| Aaron Freidin | Chief Financial Officer | $13,011,970 | -$5,873,573 | -31% | Filing P/S | 08 Apr 2026 |
| Andrew John Partridge | Chief Growth Officer | $10,001,117 | -$91,070 | -0.9% | Filing P/S | 04 Jun 2026 |
| Gregory L. Summe | Director | $2,338,261 | Median | 18 Jun 2026 | ||
| William J. Chase | Director | $2,206,839 | Median | 18 Jun 2026 | ||
| Sarah Krevans | Director | $2,203,015 | Median | 18 Jun 2026 | ||
| Steven Mizell | Director | $2,199,604 | Median | 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -1.58% | $501,409 | $82.01 | -6,114 | 381,818 | 16 Oct 2025 | Direct |
| Robert P. Ragusa | GRAL | Common Stock | Sale | -0.99% | $498,622 | $68.88 | -7,239 | 727,388 | 15 Oct 2025 | Direct |
| Steven Mizell | GRAL | Common Stock | Award | 0.74% | 267 | 36,469 | 15 Oct 2025 | Direct | ||
| Joshua J. Ofman | GRAL | Common Stock | Sale | -2.23% | $673,985 | $76.03 | -8,865 | 387,932 | 15 Oct 2025 | Direct |
| Gregory L. Summe | GRAL | Common Stock | Award | 1.11% | 425 | 38,794 | 15 Oct 2025 | Direct | ||
| William J. Chase | GRAL | Common Stock | Award | 0.76% | 275 | 36,590 | 15 Oct 2025 | Direct | ||
| Joshua J. Ofman | GRAL | Common Stock | Sale | -17% | $5,086,562 | $62.50 | -81,385 | 396,797 | 06 Oct 2025 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -1.99% | $620,312 | $64.00 | -9,692 | 478,182 | 02 Oct 2025 | Direct |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -0.85% | $134,548 | $32.02 | -4,202 | 487,874 | 19 Aug 2025 | Direct |
| Aaron Freidin | GRAL | Common Stock | Sale | -0.31% | $28,082 | $32.02 | -877 | 285,143 | 19 Aug 2025 | Direct |
| William J. Chase | GRAL | Common Stock | Award | 1.49% | 533 | 36,315 | 15 Jul 2025 | Direct | ||
| Gregory L. Summe | GRAL | Common Stock | Award | 2.2% | 825 | 38,369 | 15 Jul 2025 | Direct | ||
| Steven Mizell | GRAL | Common Stock | Award | 1.45% | 517 | 36,202 | 15 Jul 2025 | Direct | ||
| Aaron Freidin | GRAL | Common Stock | Sale | -2.72% | $311,440 | $38.93 | -8,000 | 286,020 | 15 Jul 2025 | Direct |
| Chun R. Ding | GRAL | Common Stock | Sale | -9.32% | $16,830,151 | $49.53 | -339,800 | 3,305,055 | 01 Jul 2025 | See Footnotes |
| Joshua J. Ofman | GRAL | Common Stock | Sale | -1.93% | $503,984 | $52.00 | -9,692 | 492,076 | 30 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.