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Smart Money Score
Composite context from Form 4, 13F and congressional disclosures; not a forecast.
Of the 23 tracked institutions holding SNDK, 15 have a 3-year clone track record — 13 of them beat the S&P. Average holder's clone alpha: +5.4pt. It's a gauge of who owns the name, not just how many.
Among the 23 tracked institutional investors we monitor, SNDK (SANDISK CORP) is held with a combined value of $74.78B across 48,843,117 shares. The largest holder is BlackRock, Inc. with a position worth $23.41B (0.35% of their portfolio). 2 funds opened new positions in the most recent quarter. 7 funds increased their holdings. 14 funds reduced their position.
Total Institutional Value
$74.78B
Total Shares Held
48,843,117
Institutional Holders
23
% of Shares Outstanding
33.4%
of 146.42M shares · SEC 2026-08-07
Days to Cover
1.0+12.5%
7.68M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 33.4% of SNDK's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-08-07), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
40
$17.62M
Total Transactions
40
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Sep 8, 2026 | Bernard Shek | S | Sale | 2,308 | $4.08M |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 80 | $124.62K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 40 | $61.28K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 80 | $123.07K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 80 | $123.68K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 40 | $62.02K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 40 | $62.36K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 40 | $61.95K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 120 | $187.40K |
| Sep 3, 2026 | Alper Ilkbahar | S | Sale | 40 | $60.53K |
Showing 10 of 40 transactions
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $23.41B | 0.35% | -1.0% |
| 2 | FMR LLC | $17.88B | 0.78% | -41.3% |
| 3 | STATE STREET CORP | $13.48B | 0.40% | +6.3% |
| 4 | Situational Awareness LP | $5.67B | 28.13% | +118.9% |
| 5 | VANGUARD GROUP INC | $4.03B | 0.06% | -3.3% |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | $3.64B | 0.36% | +38.4% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | $2.43B | 0.42% | +71.2% |
| 8 | Whale Rock Capital Management LLC | $1.36B | 10.89% | -25.4% |
| 9 | AQR CAPITAL MANAGEMENT LLC | $965.30M | 0.34% | -35.8% |
| 10 | MILLENNIUM MANAGEMENT LLC | $832.48M | 0.56% | -73.9% |
| Member | Type | Date |
|---|---|---|
| Josh Gottheimer | Buy | May 7, 2026 |
| Alan Armstrong | Buy | Mar 27, 2026 |
| Gilbert Cisneros | Buy | Mar 13, 2026 |
| Gilbert Cisneros | Buy |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of SNDK with a position worth $23.41B, representing 0.35% of their portfolio. In total, 23 institutional investors hold SNDK with a combined value of $74.78B.
In the most recent quarter, 2 funds opened a new position in SNDK. Additionally, 7 increased their holdings and 14 reduced their positions.
Institutional investors hold $74.78B worth of SNDK stock across 23 positions. The largest institutional holder is BlackRock, Inc. with $23.41B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For SNDK, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their SNDK positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-05 |
SEC Schedule 13D (activist) and 13G (passive) filings for SNDK. Filed when an investor acquires 5%+ ownership.
| Jan 9, 2026 |
| Lisa McClain | Sell | Oct 31, 2025 |
| Lisa McClain | Sell | Oct 30, 2025 |
| Lisa McClain | Buy | Oct 30, 2025 |
| Rob Bresnahan | Sell | Apr 8, 2025 |
Showing 8 of 11. STOCK Act disclosures lag up to 45 days.
Last Close
$1,764
2026-09-09
YTD
+541.0%
75% of 52-week range