VANGUARD GROUP INC
Rank #1
11.4%
- Shares
- 16.98M
- Change
- -584.91K
- Change %
- -3.33%
- Filing
- Dec 31, 2025
Decreased
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
NASDAQ · TECHNOLOGY · Holders
Sandisk Corp (SNDK) Institutional Ownership & Insider Trading History
Top SNDK institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Ownership read
SNDK insider sentiment: Net selling.
VANGUARD GROUP INC is the largest loaded institutional holder. 7 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
SNDK
Purchases—
Sales198.29K
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
16.98M
VANGUARD GROUP INC
Insider stance
Net selling
$323.62M sold / — bought
Latest filing
Jun 2, 2026
Most recent holder or insider filing date
Rows loaded
200
120 holder / 80 insider
- Holder rows
- 120
- Market data feed
- Latest filing
- Jun 2, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 70
- 48 decreased in loaded rows
- Insider rows
- 80
- Market data feed
Top 120 institutional holders
Sandisk Corp (SNDK) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where the ownership feed supplies them.
FMR LLC
Rank #2
9.02%
- Shares
- 13.39M
- Change
- -8.08M
- Change %
- -37.62%
- Filing
- Mar 31, 2026
Decreased
BLACKROCK
Rank #3
7.00%
- Shares
- 10.40M
- Change
- +779.04K
- Change %
- +8.09%
- Filing
- Mar 31, 2026
Increased
VANGUARD CAPITAL MANAGEMENT LLC
Rank #4
6.41%
- Shares
- 9.53M
- Change
- +9.53M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
STATE STREET CORP
Rank #5
3.75%
- Shares
- 5.57M
- Change
- +292.33K
- Change %
- +5.54%
- Filing
- Mar 31, 2026
Increased
GEODE CAPITAL MANAGEMENT
Rank #6
2.84%
- Shares
- 4.21M
- Change
- +556.91K
- Change %
- +15.23%
- Filing
- Mar 31, 2026
Increased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #7
2.41%
- Shares
- 3.58M
- Change
- +3.58M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
MORGAN STANLEY
Rank #8
1.91%
- Shares
- 2.84M
- Change
- -130.87K
- Change %
- -4.41%
- Filing
- Mar 31, 2026
Decreased
ARROWSTREET CAPITAL
Rank #9
1.90%
- Shares
- 2.82M
- Change
- -654.03K
- Change %
- -18.80%
- Filing
- Mar 31, 2026
Decreased
NORGES BANK
Rank #10
1.47%
- Shares
- 2.19M
- Change
- +435.17K
- Change %
- +24.86%
- Filing
- Dec 31, 2025
Increased
GOLDMAN SACHS GROUP INC
Rank #11
1.38%
- Shares
- 2.04M
- Change
- +1.38M
- Change %
- +2.10%
- Filing
- Mar 31, 2026
Increased
JANE STREET GROUP
Rank #12
1.20%
- Shares
- 1.79M
- Change
- +941.49K
- Change %
- +1.11%
- Filing
- Mar 31, 2026
Increased
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Rank #13
1.17%
- Shares
- 1.74M
- Change
- +102.12K
- Change %
- +6.22%
- Filing
- Mar 31, 2026
Increased
JPMORGAN CHASE & CO
Rank #14
0.96%
- Shares
- 1.43M
- Change
- +534.13K
- Change %
- +59.70%
- Filing
- Mar 31, 2026
Increased
BNP PARIBAS FINANCIAL MARKETS
Rank #15
0.84%
- Shares
- 1.25M
- Change
- +396.72K
- Change %
- +46.43%
- Filing
- Mar 31, 2026
Increased
NORTHERN TRUST CORP
Rank #16
0.83%
- Shares
- 1.23M
- Change
- +100.81K
- Change %
- +8.89%
- Filing
- Mar 31, 2026
Increased
CLEAR STREET GROUP INC.
Rank #17
0.82%
- Shares
- 1.22M
- Change
- +1.22M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
D. E. SHAW & CO.
Rank #18
0.79%
- Shares
- 1.17M
- Change
- -920.08K
- Change %
- -43.96%
- Filing
- Mar 31, 2026
Decreased
INVESCO LTD.
Rank #19
0.78%
- Shares
- 1.17M
- Change
- -161.18K
- Change %
- -12.15%
- Filing
- Mar 31, 2026
Decreased
PRICE T ROWE ASSOCIATES INC
Rank #20
0.78%
- Shares
- 1.16M
- Change
- -281.43K
- Change %
- -19.58%
- Filing
- Mar 31, 2026
Decreased
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 11.4% | 16.98M | -584.91K Decreased | -3.33% | Dec 31, 2025 | |
| 2 | 9.02% | 13.39M | -8.08M Decreased | -37.62% | Mar 31, 2026 | |
| 3 | 7.00% | 10.40M | +779.04K Increased | +8.09% | Mar 31, 2026 | |
| 4 | 6.41% | 9.53M | +9.53M Initiated | — | Mar 31, 2026 | |
| 5 | 3.75% | 5.57M | +292.33K Increased | +5.54% | Mar 31, 2026 | |
| 6 | 2.84% | 4.21M | +556.91K Increased | +15.23% | Mar 31, 2026 | |
| 7 | 2.41% | 3.58M | +3.58M Initiated | — | Mar 31, 2026 | |
| 8 | 1.91% | 2.84M | -130.87K Decreased | -4.41% | Mar 31, 2026 | |
| 9 | ARROWSTREET CAPITAL | 1.90% | 2.82M | -654.03K Decreased | -18.80% | Mar 31, 2026 |
| 10 | 1.47% | 2.19M | +435.17K Increased | +24.86% | Dec 31, 2025 | |
| 11 | 1.38% | 2.04M | +1.38M Increased | +2.10% | Mar 31, 2026 | |
| 12 | JANE STREET GROUP | 1.20% | 1.79M | +941.49K Increased | +1.11% | Mar 31, 2026 |
| 13 | 1.17% | 1.74M | +102.12K Increased | +6.22% | Mar 31, 2026 | |
| 14 | 0.96% | 1.43M | +534.13K Increased | +59.70% | Mar 31, 2026 | |
| 15 | BNP PARIBAS FINANCIAL MARKETS | 0.84% | 1.25M | +396.72K Increased | +46.43% | Mar 31, 2026 |
| 16 | 0.83% | 1.23M | +100.81K Increased | +8.89% | Mar 31, 2026 | |
| 17 | CLEAR STREET GROUP INC. | 0.82% | 1.22M | +1.22M Initiated | — | Mar 31, 2026 |
| 18 | 0.79% | 1.17M | -920.08K Decreased | -43.96% | Mar 31, 2026 | |
| 19 | 0.78% | 1.17M | -161.18K Decreased | -12.15% | Mar 31, 2026 | |
| 20 | 0.78% | 1.16M | -281.43K Decreased | -19.58% | Mar 31, 2026 |
Showing 20 of 120 matching institutional rows.Load more institutions
Recent insider transactions
Sandisk Corp (SNDK) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
Ilkbahar Alper
- Shares
- 49.98K
- % company
- 0.03%
- Price
- Non-cash
- Value
- Non-cash
Filed Jun 2, 2026
Ilkbahar Alper
- Shares
- 52.68K
- % company
- 0.04%
- Price
- $1,758
- Value
- $92,627,063
Filed Jun 1, 2026
Ilkbahar Alper
- Shares
- 53.28K
- % company
- 0.04%
- Price
- $1,757
- Value
- $93,607,689
Filed Jun 1, 2026
Ilkbahar Alper
- Shares
- 53.68K
- % company
- 0.04%
- Price
- $1,755
- Value
- $94,221,702
Filed Jun 1, 2026
Shek Bernard
- Shares
- 32.83K
- % company
- 0.02%
- Price
- $1,479
- Value
- $48,548,350
Filed May 25, 2026
Ilkbahar Alper
- Shares
- 54.68K
- % company
- 0.04%
- Price
- $1,479
- Value
- $80,850,333
Filed May 25, 2026
Goeckeler David
- Shares
- 509.90K
- % company
- 0.34%
- Price
- $1,479
- Value
- $753,988,467
Filed May 25, 2026
Shek Bernard
- Shares
- 33.04K
- % company
- 0.02%
- Price
- $1,542
- Value
- $50,960,236
Filed May 21, 2026
Ilkbahar Alper
- Shares
- 55.33K
- % company
- 0.04%
- Price
- $1,542
- Value
- $85,332,139
Filed May 21, 2026
Visoso Luis Felipe
- Shares
- 165.06K
- % company
- 0.11%
- Price
- $1,542
- Value
- $254,559,050
Filed May 21, 2026
Goeckeler David
- Shares
- 511.47K
- % company
- 0.35%
- Price
- $1,542
- Value
- $788,812,577
Filed May 21, 2026
Shek Bernard
- Shares
- 33.15K
- % company
- 0.02%
- Price
- $1,393
- Value
- $46,163,364
Filed May 20, 2026
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | Ilkbahar Alper | 0.03% | Gift | 49.98K | Non-cash | Non-cash | Jun 2, 2026 |
| 2 | Ilkbahar Alper | 0.04% | Sale | 52.68K | $1,758 | $92,627,063 | Jun 1, 2026 |
| 3 | Ilkbahar Alper | 0.04% | Sale | 53.28K | $1,757 | $93,607,689 | Jun 1, 2026 |
| 4 | Ilkbahar Alper | 0.04% | Sale | 53.68K | $1,755 | $94,221,702 | Jun 1, 2026 |
| 5 | Shek Bernard | 0.02% | Tax withholding | 32.83K | $1,479 | $48,548,350 | May 25, 2026 |
| 6 | Ilkbahar Alper | 0.04% | Tax withholding | 54.68K | $1,479 | $80,850,333 | May 25, 2026 |
| 7 | Goeckeler David | 0.34% | Tax withholding | 509.90K | $1,479 | $753,988,467 | May 25, 2026 |
| 8 | Shek Bernard | 0.02% | Tax withholding | 33.04K | $1,542 | $50,960,236 | May 21, 2026 |
| 9 | Ilkbahar Alper | 0.04% | Tax withholding | 55.33K | $1,542 | $85,332,139 | May 21, 2026 |
| 10 | Visoso Luis Felipe | 0.11% | Tax withholding | 165.06K | $1,542 | $254,559,050 | May 21, 2026 |
| 11 | Goeckeler David | 0.35% | Tax withholding | 511.47K | $1,542 | $788,812,577 | May 21, 2026 |
| 12 | Shek Bernard | 0.02% | Tax withholding | 33.15K | $1,393 | $46,163,364 | May 20, 2026 |
Showing 12 of 80 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders
Frequently asked
Common questions.
Who are the largest SNDK shareholders?
VANGUARD GROUP INC is the largest institutional holder in the loaded SNDK ownership feed, with 16.98 million shares, or about 11.43% of shares outstanding. The table ranks additional institutions by reported share count.
What is institutional ownership of SNDK?
The current TECHi snapshot has 120 loaded institutional rows for Sandisk Corp. 70 rows are marked increased or initiated, while 48 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
Where can I see Sandisk Corp insider transactions?
The insider transaction table currently shows 80 loaded Form 4 rows for SNDK, with the latest insider filing dated Jun 2, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
Are SNDK insiders buying or selling?
The loaded SNDK Form 4 rows currently read Net selling: 7 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
Who is the most active SNDK insider in the loaded filings?
WESTERN DIGITAL CORP is the most active insider by absolute share movement in the loaded SNDK rows, with 15.03 million shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.