Sandisk Corporation
Sandisk Corporation (SNDK) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SNDK · as of Sep 30, 2025
Ownership Breakdown
569
Institutional Holders
▲ 129 vs Q2
$18.76B
Total Inst. Value
▲ $12.47B vs Q2
148.09M
Shares Outstanding
freeFloat 98.60%
124.63M
13F Shares Held
▼ 13.87M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SNDK largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
FMR LLC computer storage devices | 21.83M | 15.06% | 15.06% | $2.45T | Nov 13, 2025 | ▲ 39.6K |
VANGUARD GROUP INC computer storage devices | 17.56M | 12.11% | 12.11% | $1.97T | Nov 7, 2025 | ▲ 1.01M |
BLACKROCK, INC. computer storage devices | 16.04M | 11.06% | 11.06% | $1.80T | Nov 12, 2025 | ▼ 722.2K |
STATE STREET CORP computer storage devices | 4.38M | 3.02% | 3.02% | $491.05B | Nov 14, 2025 | ▲ 99.9K |
PRICE T ROWE ASSOCIATES INC /MD/ computer storage devices | 3.31M | 2.28% | 2.28% | $371.17B | Nov 14, 2025 | ▼ 2.35M |
MORGAN STANLEY computer storage devices | 2.77M | 1.91% | 1.91% | $310.89B | May 27, 2026 | ▲ 939.1K |
SLATE PATH CAPITAL LP computer storage devices | 2.69M | 1.86% | 1.86% | $302.23B | Nov 14, 2025 | ▼ 2.04M |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP computer storage devices | 2.65M | 1.83% | 1.83% | $297.29B | Nov 13, 2025 | ▲ 1.27M |
GEODE CAPITAL MANAGEMENT, LLC computer storage devices | 2.52M | 1.74% | 1.74% | $283.09B | Nov 12, 2025 | ▲ 129.9K |
MADISON AVENUE PARTNERS, LP computer storage devices | 2.06M | 1.42% | 1.42% | $231.41B | Nov 14, 2025 | ▼ 1.51M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
29
Increased
+14.89M shares8
New Positions
first time holders12
Decreased
−17.57M shares0
Sold Out
fully exitedNet shares change (top 50)
2.67M
+14.89M / −17.57M
Net new holders
+25
8 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SNDK insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
21
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Shek Bernard Chief Legal Officer & Secty | Jun 3, 2026 | Sale | 600 | $1736.00 | $1.04M | 32.2K | Form 4 ↗ |
Ilkbahar Alper EVP, Chief Technology Officer | Jun 1, 2026 | Sale | 999 | $1755.31 | $1.75M | 53.7K | Form 4 ↗ |
Ilkbahar Alper EVP, Chief Technology Officer | Jun 1, 2026 | Sale | 401 | $1757.00 | $704.6K | 53.3K | Form 4 ↗ |
Ilkbahar Alper EVP, Chief Technology Officer | Jun 1, 2026 | Sale | 600 | $1758.40 | $1.06M | 52.7K | Form 4 ↗ |
Ilkbahar Alper EVP, Chief Technology Officer | Jun 2, 2026 | Gift | 2,694 | — | — | 50.0K | Form 4 ↗ |
Shek Bernard Chief Legal Officer & Secty | May 25, 2026 | Tax Withhold | 211 | $1478.69 | $312.0K | 32.8K | Form 4 ↗ |
Goeckeler David Chairman and CEO | May 25, 2026 | Tax Withhold | 1,569 | $1478.69 | $2.32M | 509.9K | Form 4 ↗ |
Ilkbahar Alper EVP, Chief Technology Officer | May 25, 2026 | Tax Withhold | 653 | $1478.69 | $965.6K | 54.7K | Form 4 ↗ |
Visoso Luis Felipe EVP and Chief Financial Office | May 21, 2026 | Tax Withhold | 1,588 | $1542.24 | $2.45M | 165.1K | Form 4 ↗ |
Shek Bernard Chief Legal Officer & Secty | May 20, 2026 | Tax Withhold | 109 | $1392.56 | $151.8K | 33.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Sandisk Corporation (SNDK) is primarily owned by institutional investors, who hold approximately 84.2% of total shares outstanding. Company insiders own approximately 1.40%, while retail and public investors account for the remaining 14.44%.
The largest institutional shareholder of Sandisk Corporation is FMR LLC, holding approximately 21.83 million shares — equal to 15.06% of outstanding shares — as of September 30, 2025.
A total of 569 institutional investors currently hold SNDK stock, with a combined institutional value of approximately $18.76 billion as of the most recent 13F filing period.
Frequently asked questions
SNDK ownershipSandisk Corporation (SNDK) is primarily owned by institutional investors, who hold approximately 84.2% of shares. The largest shareholder is FMR LLC with a 15.06% stake. Company insiders hold 1.40%. Data sourced from SEC Form 13F as of September 30, 2025.