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Jim Simons's Sandisk Corporation (SNDK) position

Yes: as of Q1 2026, Jim Simons holds 800K shares of SNDK worth $508M (0.8% of the disclosed portfolio). Last quarter the position was reduced by 33.9%. First disclosed Q2 2025.
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Current value
$508M
Shares held
800K
% of portfolio
0.8%
Est. average buy price (i)
$95.41
Quarter-end price
$635.34

Estimated trade prices

Average price in quarters with purchases
$95.41
Average prices in quarters with sales
  • Q1 2026: $563.78 (409K shares sold)

SNDK price vs Simons's position

1Y 3Y 5Y MAX
Dates
$20$2,000$4,0002026New position of 413K shares · Q2 2025. Average closing price $38.24 · Price range $29.62–$48.11413KsharespurchasedAdded 422K shares (102.2%) · Q3 2025. Average closing price $58.39 · Price range $40.69–$113.50422KsharespurchasedAdded 374K shares (44.8%) · Q4 2025. Average closing price $200.38 · Price range $117.91–$283.10374KsharespurchasedSold 409K shares (33.9%) · Q1 2026. Average closing price $563.78 · Price range $274.08–$772.09409Ksharessold
Average closing price · filing quarter
$563.78
Price range · filing quarter
$274.08 – $772.09
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −409K −$231M −33.9% 800K May 14, 2026
Q4 2025 Added +374K +$75M +44.8% 1.2M Feb 12, 2026
Q3 2025 Added +422K +$25M +102.2% 835K Nov 13, 2025
Q2 2025 New +413K +$16M – 413K Aug 13, 2025
Data through Q1 2026 · filed May 14, 2026
4 grouped rows from 4 quarters

Who else owns SNDK

FMR LLC
owns 9.0% of shares outstanding
Est. $8.5B · Shares: 13.4M

Morgan Stanley
owns 1.9% of shares outstanding
Est. $1.8B · Shares: 2.8M

Arrowstreet Capital, Limited Partnership
owns 1.9% of shares outstanding
Est. $1.8B · Shares: 2.8M

Goldman Sachs Group Inc
owns 1.4% of shares outstanding
Est. $1.3B · Shares: 2.0M

See all owners of SNDK →

More Simons positions

United Therapeutics Corporation(UTHR)
$1.1B
1.7% of portfolio

Palantir Technologies Inc.(PLTR)
$997M
1.6% of portfolio

Apple Inc.(AAPL)
$778M
1.2% of portfolio

Kinross Gold Corporation(KGC)
$780M
1.2% of portfolio

Micron Technology, Inc.(MU)
$731M
1.1% of portfolio

VeriSign, Inc.(VRSN)
$700M
1.1% of portfolio

Common questions

Does Jim Simons own SNDK?

Yes. As of Q1 2026, Jim Simons disclosed 800K shares of SNDK, worth $508M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy SNDK?

Jim Simons first disclosed a SNDK position in Q2 2025; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Jim Simons sell SNDK?

The quarter-by-quarter table above shows each sale and reduction Jim Simons disclosed in SNDK. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of SNDK does Jim Simons own?

Jim Simons disclosed 800K shares of SNDK as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Jim Simons pay for SNDK?

Jim Simons's estimated average buy price for SNDK is $95.41, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.