Comparable stake leader
VANGUARD CAPITAL MANAGEMENT LLC
SEC ownership of Sandisk Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002023554.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
17 Sep 2026
- Public ticker
- SNDK 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
-
VANGUARD CAPITAL MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
17 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002023554
- Issuer location
- Milpitas, 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 Sandisk Corp (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
VANGUARD CAPITAL MANAGEME...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
17 Sep 2026
13F
13D/G
3/4/5
Lead comparable stake: 7.2%
13D/G row: VANGUARD CAPITAL MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.2%.
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 VANGUARD CAPITAL MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD CAPITAL MANAGEMENT LLC
7.2%
BlackRock, Inc.
6%
FMR LLC
5.3%
JANE STREET GROUP, LLC
5%
WESTERN DIGITAL CORP
0.7%
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 |
|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
7.2%
from 13D/G
|
$21,983,001,441
9,668,255 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6%
from 13D/G
|
$23,408,732,489
10,295,300 shares
|
— | 30 Jun 2026 |
| FMR LLC |
13F
13D/G
Company
|
5.3%
from 13D/G
|
$17,875,301,780
7,861,665 shares
|
— | 30 Jun 2026 |
| JANE STREET GROUP, LLC |
13D/G
13F
Company
|
5%
|
$14,195,888,537
7,409,437 shares
|
$0 | 30 Jul 2026 |
| WESTERN DIGITAL CORP |
13D/G
3/4/5
Western Digital Corporation · 10%+ Owner
|
0.7%
|
$884,717,315
1,038,681 shares
|
-$5,514,646,878 | 31 Mar 2026 |
| DnB Asset Management AS |
13D/G
|
0.7%
|
$115,046,851
1,025,373 shares
|
-$682,614,926 | 30 Sep 2025 |
| Michael Pokorny |
3/4/5
VP, Chief Accounting Officer
|
0.01%
|
$48,998,881
21,550 shares
|
-$3,488,436 | 17 Sep 2026 |
| Miyuki Suzuki |
3/4/5
Director
|
0.01%
|
$6,216,952
9,907 shares
|
-$2,196,360 | 25 Feb 2026 |
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: -$132,728,742.
Buys
$0
Insiders: 0
Sells
$132,728,742
Insiders: 7
Net
-$132,728,742
Shares: -88,295
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 88,295
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 77,899 | $0 | $121,370,866 | -$121,370,866 |
| 3-6 | 0 | 5,625 | $0 | $8,913,490 | -$8,913,490 |
| 6-9 | 0 | 3,500 | $0 | $2,196,360 | -$2,196,360 |
| 9-12 | 0 | 1,271 | $0 | $248,027 | -$248,027 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to Sandisk Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
David Goeckeler
Net 12M change
-$132,728,742
Latest report
17 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| David Goeckeler | Chairman & CEO, Director | $607,606,755 | -$104,972,834 | -15% | Filing P/S | 17 Sep 2026 |
| WESTERN DIGITAL CORP | 10%+ Owner | $315,546,798 | Mixed | 09 Jun 2025 | ||
| Luis F. Visoso | Evp & Cfo | $301,521,609 | -$1,568,830 | -0.52% | Median | 17 Sep 2026 |
| Alper Ilkbahar | EVP & Chief Technology Officer | $95,744,496 | -$11,397,901 | -11% | Median | 17 Sep 2026 |
| Bernard Shek | Chief Legal Officer and Secty | $59,544,441 | -$7,986,054 | -12% | Median | 17 Sep 2026 |
| Michael Pokorny | VP, Chief Accounting Officer | $48,998,881 | -$3,488,436 | -6.6% | Median | 17 Sep 2026 |
| Miyuki Suzuki | Director | $6,216,952 | -$2,196,360 | -26% | Filing P/S | 25 Feb 2026 |
| Thomas Caulfield | Director | $4,540,139 | Mixed | 12 May 2026 | ||
| Necip Sayiner | Director | $4,359,019 | -$1,118,327 | -20% | Filing P/S | 08 May 2026 |
| Matthew E. Massengill | Director | $873,319 | Mixed | 03 Mar 2025 | ||
| Richard B. Cassidy II | Director | $862,554 | Mixed | 18 Nov 2025 | ||
| Devinder Kumar | Director | $837,102 | Mixed | 18 Nov 2025 | ||
| Ellyn Shook | Director | $833,767 | Mixed | 18 Nov 2025 | ||
| Kimberly Alexy | Director | $704,899 | Mixed | 03 Mar 2025 | ||
| Alexander R. Bradley | Director | $185,579 | Mixed | 30 Dec 2025 |
Recent insider transactions for Sandisk Corp
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.45% | -118 | 26,188 | 20 Sep 2026 | Direct | ||
| Michael Pokorny | SNDK | Common Stock | Award | 2.17% | 458 | 21,550 | 17 Sep 2026 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Award | 1.25% | 1,635 | 132,611 | 17 Sep 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Sale | -8.12% | $53,272,704 | $1574.21 | -33,841 | 382,865 | 17 Sep 2026 | Direct |
| David Goeckeler | SNDK | Common Stock | Award | 0.8% | 3,296 | 416,706 | 17 Sep 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Award | 3.96% | 1,001 | 26,306 | 17 Sep 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Award | 4% | 1,619 | 42,109 | 17 Sep 2026 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Sale | -0.76% | $1,568,830 | $1568.83 | -1,000 | 130,976 | 15 Sep 2026 | Direct |
| David Goeckeler | SNDK | Common Stock | Sale | -7.57% | $51,700,130 | $1527.87 | -33,838 | 413,410 | 14 Sep 2026 | Direct |
| Bernard Shek | SNDK | Common Stock | Sale | -8.36% | $4,078,998 | $1767.33 | -2,308 | 25,305 | 08 Sep 2026 | Direct |
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -7.42% | -3,244 | 40,490 | 03 Sep 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Sale | -0.91% | $625,557 | $1563.89 | -400 | 43,734 | 03 Sep 2026 | Direct |
| Alper Ilkbahar | SNDK | Common Stock | Sale | -9.65% | $7,259,191 | $1540.58 | -4,712 | 44,134 | 03 Sep 2026 | Direct |
| Bernard Shek | SNDK | Common Stock | Tax liability | -7.6% | -2,271 | 27,613 | 03 Sep 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -2.3% | -10,540 | 447,248 | 03 Sep 2026 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -4.24% | -5,838 | 131,976 | 03 Sep 2026 | Direct | ||
| Michael Pokorny | SNDK | Common Stock | Tax liability | -5.73% | -1,283 | 21,092 | 03 Sep 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Sale | -1.97% | $915,360 | $1525.60 | -600 | 29,884 | 01 Sep 2026 | Direct |
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.69% | -212 | 30,484 | 25 Aug 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -9.81% | -49,782 | 457,788 | 25 Aug 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -1.32% | -654 | 48,846 | 25 Aug 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.64% | -320 | 49,500 | 21 Aug 2026 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -1.14% | -1,589 | 137,814 | 21 Aug 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.2% | -1,033 | 507,570 | 21 Aug 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.35% | -108 | 30,696 | 21 Aug 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.87% | -439 | 49,820 | 20 Aug 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Options Exercise | 0.55% | 276 | 50,259 | 20 Aug 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Performance Shares | Options Exercise | -0.19% | -276 | 148,770 | 20 Aug 2026 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -15.5% | -25,655 | 139,403 | 20 Aug 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.25% | -1,300 | 508,603 | 20 Aug 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.36% | -111 | 30,804 | 20 Aug 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Sale | -1.9% | $697,296 | $1162.16 | -600 | 30,915 | 03 Aug 2026 | Direct |
| Bernard Shek | SNDK | Common Stock | Sale | -1.87% | $1,252,800 | $2088.00 | -600 | 31,515 | 01 Jul 2026 | Direct |
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.36% | -117 | 32,115 | 20 Jun 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Sale | -1.83% | $1,041,600 | $1736.00 | -600 | 32,232 | 03 Jun 2026 | Direct |
| Alper Ilkbahar | SNDK | Common Stock | Gift | -5.11% | -2,694 | 49,983 | 02 Jun 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Sale | -3.66% | $3,513,153 | $1756.58 | -2,000 | 52,677 | 01 Jun 2026 | Direct |
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.64% | -211 | 32,832 | 25 May 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.31% | -1,569 | 509,903 | 25 May 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -1.18% | -653 | 54,677 | 25 May 2026 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -0.95% | -1,588 | 165,058 | 21 May 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.32% | -107 | 33,043 | 21 May 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.2% | -1,032 | 511,472 | 21 May 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.57% | -319 | 55,330 | 21 May 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.33% | -109 | 33,150 | 20 May 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.25% | -1,299 | 512,504 | 20 May 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.29% | -162 | 55,649 | 20 May 2026 | Direct | ||
| Michael Pokorny | SNDK | Common Stock | Sale | -9.85% | $3,488,436 | $1426.18 | -2,446 | 22,375 | 12 May 2026 | Direct |
| Thomas Caulfield | SNDK | Common Stock | Gift | -66.7% | -9,666 | 4,834 | 12 May 2026 | Spouse's Trust | ||
| Michael Pokorny | SNDK | Common Stock | Tax liability | -5.44% | -1,429 | 24,821 | 09 May 2026 | Direct |
* marks a reported price that did not pass the local price check.