SEC ownership of Sandisk Corp

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002023554.

Comparable stake leader

VANGUARD CAPITAL MANAGEMENT LLC

Disclosed value leader

BlackRock, Inc.

Comparable rows

50/50

Latest evidence

30 Jul 2026

Top shareholders Insider holders Latest transactions

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: 30 Jul 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0002023554
Issuer location: Milpitas, CA

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

30 Jul 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 13F 13D/G	7.2% from 13D/G	$21,983,001,441 9,668,255 shares	—	30 Jun 2026
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	6% from 13D/G	$23,408,732,489 10,295,300 shares	—	30 Jun 2026
FMR LLC	13F 13D/G Company 13F 13D/G	5.3% from 13D/G	$17,875,301,780 7,861,665 shares	—	30 Jun 2026
JANE STREET GROUP, LLC	13D/G 13F Company 13D/G 13F	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 13D/G 3/4/5	0.7%	$884,717,315 1,038,681 shares	-$5,514,646,878	31 Mar 2026
DnB Asset Management AS	13D/G 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 3/4/5	0.02%	$31,910,777 22,375 shares	-$3,488,436	12 May 2026
Miyuki Suzuki	3/4/5 Director 3/4/5	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: -$13,307,972.

Buys

Insiders: 0

Sells

$13,307,972

Insiders: 5

Net

-$13,307,972

Shares: -11,596

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 0 Shares: 11,596

Window (months)	Sell shares	Buy value	Sell value	Net value
0-3	3,800	$0	$6,504,849	-$6,504,849
3-6	3,025	$0	$4,358,737	-$4,358,737
6-9	4,771	$0	$2,444,386	-$2,444,386
9-12	0	$0	$0	$0

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

Largest Forms 3/4/5 holder

David Goeckeler

Net 12M change

-$13,307,972

Latest report

25 Aug 2026

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
David Goeckeler	Chairman and CEO, Director	$1,040,886,309			Median	25 Aug 2026
WESTERN DIGITAL CORP	10%+ Owner	$315,546,798			Mixed	09 Jun 2025
Luis F. Visoso	Evp & Cfo	$313,351,826			Median	20 Aug 2026
Alper Ilkbahar	EVP, Chief Technology Officer	$111,062,615	-$3,513,153	-3.1%	Median	25 Aug 2026
Bernard Shek	Chief Legal Officer & Secty	$69,312,385	-$2,991,696	-4.1%	Median	25 Aug 2026
Michael Pokorny	VP, Chief Accounting Officer	$31,910,777	-$3,488,436	-9.9%	Filing P/S	12 May 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	-0.69%			-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
Necip Sayiner	SNDK	Common Stock	Sale	-16.6%	$870,301	$1503.11	-579	2,900	08 May 2026	Direct
Bernard Shek	SNDK	Common Stock	Tax liability	-0.12%			-41	33,259	20 Apr 2026	Direct
Alper Ilkbahar	SNDK	Common Stock	Tax liability	-3.88%			-2,251	55,811	20 Apr 2026	Direct
Bernard Shek	SNDK	Common Stock	Tax liability	-0.35%			-117	33,300	20 Mar 2026	Direct
Thomas Caulfield	SNDK	Common Stock	Gift				14,500	14,500	03 Mar 2026	Spouse's Trust
Thomas Caulfield	SNDK	Common Stock	Gift	-86.2%			-14,500	2,312	03 Mar 2026	Direct
Bernard Shek	SNDK	Common Stock	Tax liability	-0.63%			-211	33,417	25 Feb 2026	Direct
David Goeckeler	SNDK	Common Stock	Tax liability	-0.3%			-1,569	513,803	25 Feb 2026	Direct
Alper Ilkbahar	SNDK	Common Stock	Tax liability	-0.97%			-566	58,062	25 Feb 2026	Direct
Miyuki Suzuki	SNDK	Common Stock	Sale	-26.1%	$2,196,360	$627.53	-3,500	9,907	25 Feb 2026	Direct
Luis F. Visoso	SNDK	Common Stock	Tax liability	-0.95%			-1,594	166,646	21 Feb 2026	Direct
Bernard Shek	SNDK	Common Stock	Tax liability	-0.32%			-107	33,628	21 Feb 2026	Direct
David Goeckeler	SNDK	Common Stock	Tax liability	-0.2%			-1,032	515,372	21 Feb 2026	Direct
Alper Ilkbahar	SNDK	Common Stock	Tax liability	-0.38%			-223	58,628	21 Feb 2026	Direct
Bernard Shek	SNDK	Common Stock	Tax liability	-0.35%			-117	33,735	20 Feb 2026	Direct
David Goeckeler	SNDK	Common Stock	Tax liability	-0.25%			-1,300	516,404	20 Feb 2026	Direct
Alper Ilkbahar	SNDK	Common Stock	Tax liability	-0.21%			-122	58,851	20 Feb 2026	Direct
Bernard Shek	SNDK	Common Stock	Tax liability	-0.1%			-34	33,852	20 Jan 2026	Direct

^* marks a reported price that did not pass the local price check.