Who owns Sandisk (SNDK)
Which tracked institutional funds hold SNDK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SNDK company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on SNDK is one-sided between 2026-Q1 and 2026-Q2: 1119 added or opened and 151 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
SNDK’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.3% of its own reported 13F book, while the median holder sizes it at 0.5% of theirs — a 0.1pp gap the other way — the median holder sizes SNDK more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in SNDK divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 1753 tracked filers holding SNDK, 1225 increased or opened the position and 604 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in SNDK between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 333
- Assenagon Asset Management S.A.$1.4B
- JENNISON ASSOCIATES LLC$1.1B
- Hudson Bay Capital Management LP$696M
- Jupiter Topco LLC$354M
- SANDS CAPITAL MANAGEMENT, LLC$348M
- Winslow Capital Management, LLC$295M
Full exits 91
- Situational Awareness Partners LP$724M
- HRT FINANCIAL LP$620M
- SG Americas Securities, LLC$600M
- Amundi$554M
- Appaloosa LP$179M
- Panoramic Hills Capital Ltd$140M
Largest adds
- BlackRock, Inc.$17.3B
- VANGUARD CAPITAL MANAGEMENT LLC$15.9B
- Invesco Ltd.$12.0B
- STATE STREET CORP$9.9B
- FMR LLC$9.4B
- JPMORGAN CHASE & CO$7.3B
Largest trims
- RENAISSANCE TECHNOLOGIES LLC$497M
- Madison Avenue Partners, LP$371M
- Anther Capital Ltd$289M
- CITADEL ADVISORS LLC$233M
- Evergreen Quality Fund GP, Ltd.$186M
- Point72 Asset Management, L.P.$126M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 10,295,300 | $23.4B | 10.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 9,668,255 | $22.0B | 10.1% | 2026-Q2 |
| FMR LLC trimmed | 7,861,665 | $17.9B | 8.2% | 2026-Q2 |
| STATE STREET CORP added | 5,927,453 | $13.5B | 6.2% | 2026-Q2 |
| Invesco Ltd. added | 5,610,346 | $12.8B | 5.8% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 3,941,436 | $8.1B | 3.7% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 3,591,499 | $8.2B | 3.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 3,515,937 | $8.0B | 3.7% | 2026-Q2 |
| Clear Street Group Inc. added | 2,983,392 | $6.8B | 3.1% | 2026-Q2 |
| Situational Awareness LP added | 2,495,344 | $5.7B | 2.6% | 2026-Q2 |
| MORGAN STANLEY trimmed | 2,400,851 | $5.5B | 2.5% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 2,169,423 | $4.9B | 2.3% | 2026-Q2 |
| NORGES BANK added | 2,055,094 | $4.7B | 2.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,741,577 | $4.0B | 1.8% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,599,211 | $3.6B | 1.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 1,448,361 | $3.3B | 1.5% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,274,137 | $2.9B | 1.3% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 1,157,795 | $2.6B | 1.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,066,886 | $2.4B | 1.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 992,504 | $2.3B | 1.0% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 850,387 | $1.9B | 0.9% | 2026-Q2 |
| Nuveen, LLC added | 848,714 | $1.9B | 0.9% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 839,305 | $1.9B | 0.9% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 742,309 | $1.7B | 0.8% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 726,722 | $1.7B | 0.8% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 713,081 | $1.6B | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 688,253 | $1.6B | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 626,651 | $1.4B | 0.7% | 2026-Q2 |
| Assenagon Asset Management S.A. new | 621,849 | $1.4B | 0.6% | 2026-Q2 |
| EXCHANGE TRADED CONCEPTS, LLC added | 610,115 | $1.4B | 0.6% | 2026-Q2 |
| Whale Rock Capital Management LLC trimmed | 596,545 | $1.4B | 0.6% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 593,382 | $1.3B | 0.6% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 561,911 | $1.3B | 0.6% | 2026-Q2 |
| Legal & General Group Plc added | 544,041 | $1.2B | 0.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 539,130 | $1.2B | 0.6% | 2026-Q2 |
| Polar Capital Holdings Plc trimmed | 492,817 | $1.1B | 0.5% | 2026-Q2 |
| JENNISON ASSOCIATES LLC new | 472,125 | $1.1B | 0.5% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 449,306 | $1.0B | 0.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 445,251 | $965M | 0.4% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 422,658 | $960M | 0.4% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 409,650 | $931M | 0.4% | 2026-Q2 |
| BARCLAYS PLC trimmed | 375,005 | $853M | 0.4% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 366,129 | $832M | 0.4% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 344,141 | $782M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 337,958 | $768M | 0.4% | 2026-Q2 |
| GF FUND MANAGEMENT CO. LTD. trimmed | 325,682 | $741M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 321,773 | $732M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 320,340 | $728M | 0.3% | 2026-Q2 |
| Value Aligned Research Advisors, LLC added | 311,782 | $709M | 0.3% | 2026-Q2 |
| California Public Employees Retirement System added | 311,247 | $708M | 0.3% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 310,668 | $706M | 0.3% | 2026-Q2 |
| Hudson Bay Capital Management LP new | 306,118 | $696M | 0.3% | 2026-Q2 |
| Marex Group Ltd trimmed | 299,792 | $682M | 0.3% | 2026-Q2 |
| CITIGROUP INC added | 295,439 | $672M | 0.3% | 2026-Q2 |
| Swiss National Bank added | 291,462 | $663M | 0.3% | 2026-Q2 |
| Amanah Holdings Trust | 250,000 | $568M | 0.3% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 249,714 | $575M | 0.3% | 2026-Q2 |
| WT Asset Management Ltd trimmed | 246,939 | $561M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 244,665 | $556M | 0.3% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 241,675 | $550M | 0.3% | 2026-Q2 |
| Castle Hook Partners LP trimmed | 237,578 | $540M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 220,574 | $498M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 214,727 | $488M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 211,783 | $482M | 0.2% | 2026-Q2 |
| AustralianSuper Pty Ltd added | 210,902 | $480M | 0.2% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 209,990 | $477M | 0.2% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 209,217 | $476M | 0.2% | 2026-Q2 |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT added | 207,587 | $472M | 0.2% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 191,665 | $436M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 191,390 | $434M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 189,923 | $432M | 0.2% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 182,005 | $414M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 167,299 | $380M | 0.2% | 2026-Q2 |
| ProShare Advisors LLC added | 165,744 | $377M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 159,638 | $363M | 0.2% | 2026-Q2 |
| Jupiter Topco LLC new | 155,696 | $354M | 0.2% | 2026-Q2 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC trimmed | 155,402 | $353M | 0.2% | 2026-Q2 |
| SANDS CAPITAL MANAGEMENT, LLC new | 153,093 | $348M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 151,119 | $344M | 0.2% | 2026-Q2 |
| GENDELL JEFFREY L | 150,000 | $341M | 0.2% | 2026-Q2 |
| AIGH Capital Management LLC trimmed | 149,000 | $339M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 148,689 | $338M | 0.2% | 2026-Q2 |
| Mirae Asset Global Investments Co., Ltd. added | 147,376 | $335M | 0.2% | 2026-Q2 |
| Daiwa Securities Group Inc. added | 146,908 | $334M | 0.2% | 2026-Q2 |
| BANK OF NOVA SCOTIA trimmed | 144,848 | $329M | 0.2% | 2026-Q2 |
| Winslow Capital Management, LLC new | 129,876 | $295M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 126,175 | $285M | 0.1% | 2026-Q2 |
| Anther Capital Ltd trimmed | 121,271 | $276M | 0.1% | 2026-Q2 |
| Trivest Advisors Ltd added | 118,865 | $270M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO added | 118,324 | $269M | 0.1% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 116,663 | $265M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 116,642 | $265M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 116,352 | $265M | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 116,316 | $264M | 0.1% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 115,099 | $262M | 0.1% | 2026-Q2 |
| Blue Sparrow, LLC /DE new | 112,100 | $255M | 0.1% | 2026-Q2 |
| Nearwater Capital Markets, Ltd trimmed | 110,000 | $250M | 0.1% | 2026-Q2 |
| NEOS Investment Management LLC added | 109,085 | $248M | 0.1% | 2026-Q2 |
| RK Capital Management, LLC/FL new | 108,700 | $247M | 0.1% | 2026-Q2 |
| Ma Investment Partnership, LP | 100,000 | $227M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.