FMR LLC
· Reduced
−$4.6B
Change
−8.1M
Δ Own
−37.6%
Date
Q1 2026
SN
13F filing season in progress; institutional ownership uses the last closed quarter (2026 Q1)
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
FMR LLC
· Reduced
−$4.6B
Change
−8.1M
Δ Own
−37.6%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | −$4.6B | −8.1M | −37.6% | Q1 2026 | |||||
|
Vanguard
· Reduced
−$1.3B
Change
−2.4M
Date
Q1 2026
|
Vanguard | Reduced· Q1 2026 | −$1.3B | −2.4M | – | Q1 2026 | |||||
|
Norges
· Exited
−$1.2B
Change
−2.2M
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$1.2B | −2.2M | −100.0% | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Reduced
−$519M
Change
−920K
Δ Own
−44.0%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | −$519M | −920K | −44.0% | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
−$460M
Change
−816K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | −$460M | −816K | −100.0% | Q1 2026 | |||||
|
Madison Avenue Partners, LP
· Reduced
−$460M
Change
−815K
Date
Q1 2026
|
Madison Avenue Partners, LP | Reduced· Q1 2026 | −$460M | −815K | – | Q1 2026 | |||||
|
Evergreen Quality Fund Gp, Ltd.
· Reduced
−$408M
Change
−724K
Date
Q1 2026
|
Evergreen Quality Fund Gp, Ltd. | Reduced· Q1 2026 | −$408M | −724K | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Reduced
−$369M
Change
−654K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Reduced· Q1 2026 | −$369M | −654K | – | Q1 2026 | |||||
|
Bank of America Corp
· Reduced
−$364M
Change
−645K
Date
Q1 2026
|
Bank of America Corp | Reduced· Q1 2026 | −$364M | −645K | – | Q1 2026 | |||||
|
Summit Partners Public Asset Management, LLC
· Reduced
−$312M
Change
−554K
Date
Q1 2026
|
Summit Partners Public Asset Management, LLC | Reduced· Q1 2026 | −$312M | −554K | – | Q1 2026 | |||||
|
Quadrature Capital Ltd
· Reduced
−$306M
Change
−543K
Date
Q1 2026
|
Quadrature Capital Ltd | Reduced· Q1 2026 | −$306M | −543K | – | Q1 2026 | |||||
|
Trivest Advisors Ltd
· Reduced
−$262M
Change
−465K
Date
Q1 2026
|
Trivest Advisors Ltd | Reduced· Q1 2026 | −$262M | −465K | – | Q1 2026 | |||||
|
AQR Capital Management LLC
· Reduced
−$249M
Change
−441K
Date
Q1 2026
|
AQR Capital Management LLC | Reduced· Q1 2026 | −$249M | −441K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Reduced
−$248M
Change
−439K
Date
Q1 2026
|
Marshall Wace, LLP | Reduced· Q1 2026 | −$248M | −439K | – | Q1 2026 | |||||
|
Fenghe Fund Management PTE. Ltd.
· Exited
−$243M
Change
−432K
Δ Own
−100.0%
Date
Q1 2026
|
Fenghe Fund Management PTE. Ltd. | Exited· Q1 2026 | −$243M | −432K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Shek Bernard
· Officer
Sell
−$1.3M
|
Shek Bernard | Officer | Sell | $2,088.00 | −600 | −$1.3M | 32K | −1.9% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Shek Bernard
· Officer
Tax withholding or exercise payment (F)
-$256K
|
Shek Bernard | Officer | Tax withholding or exercise payment (F) | $2,184.75 | -117 | -$256K | 32K | −0.4% | Jun 20, 2026 | Jun 22, 2026 | |||||||||
|
Shek Bernard
· Officer
Sell
−$1.0M
|
Shek Bernard | Officer | Sell | $1,736.00 | −600 | −$1.0M | 32K | – | Jun 3, 2026 | Jun 5, 2026 | |||||||||
|
Ilkbahar Alper
· Officer
Gift (G)
-3K
|
Ilkbahar Alper | Officer | Gift (G) | – | -3K | – | 50K | – | Jun 2, 2026 | Jun 2, 2026 | |||||||||
|
Ilkbahar Alper
· Officer
3 operations
−$3.5M
|
Ilkbahar Alper | Officer | 3 operations | $1,755.31–$1,758.40 | −2K | −$3.5M | 53K | – | Jun 1, 2026 | Jun 2, 2026 | |||||||||
|
Shek Bernard
· Officer
Tax withholding or exercise payment (F)
-$312K
|
Shek Bernard | Officer | Tax withholding or exercise payment (F) | $1,478.69 | -211 | -$312K | 33K | – | May 25, 2026 | May 27, 2026 | |||||||||
|
Goeckeler David
· Director
Tax withholding or exercise payment (F)
-$2.3M
|
Goeckeler David | Director | Tax withholding or exercise payment (F) | $1,478.69 | -2K | -$2.3M | 510K | – | May 25, 2026 | May 27, 2026 | |||||||||
|
Ilkbahar Alper
· Officer
Tax withholding or exercise payment (F)
-$966K
|
Ilkbahar Alper | Officer | Tax withholding or exercise payment (F) | $1,478.69 | -653 | -$966K | 55K | – | May 25, 2026 | May 27, 2026 | |||||||||
|
Visoso Luis Felipe
· CFO
Tax withholding or exercise payment (F)
-$2.4M
|
Visoso Luis Felipe | CFO | Tax withholding or exercise payment (F) | $1,542.24 | -2K | -$2.4M | 165K | – | May 21, 2026 | May 22, 2026 | |||||||||
|
Shek Bernard
· Officer
Tax withholding or exercise payment (F)
-$165K
|
Shek Bernard | Officer | Tax withholding or exercise payment (F) | $1,542.24 | -107 | -$165K | 33K | – | May 21, 2026 | May 22, 2026 | |||||||||
|
Goeckeler David
· Director
Tax withholding or exercise payment (F)
-$1.6M
|
Goeckeler David | Director | Tax withholding or exercise payment (F) | $1,542.24 | -1K | -$1.6M | 511K | – | May 21, 2026 | May 22, 2026 | |||||||||
|
Ilkbahar Alper
· Officer
Tax withholding or exercise payment (F)
-$492K
|
Ilkbahar Alper | Officer | Tax withholding or exercise payment (F) | $1,542.24 | -319 | -$492K | 55K | – | May 21, 2026 | May 22, 2026 | |||||||||
|
Shek Bernard
· Officer
Tax withholding or exercise payment (F)
-$152K
|
Shek Bernard | Officer | Tax withholding or exercise payment (F) | $1,392.56 | -109 | -$152K | 33K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Goeckeler David
· Director
Tax withholding or exercise payment (F)
-$1.8M
|
Goeckeler David | Director | Tax withholding or exercise payment (F) | $1,392.56 | -1K | -$1.8M | 513K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Ilkbahar Alper
· Officer
Tax withholding or exercise payment (F)
-$226K
|
Ilkbahar Alper | Officer | Tax withholding or exercise payment (F) | $1,392.56 | -162 | -$226K | 56K | – | May 20, 2026 | May 22, 2026 | |||||||||
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Institutions hold 76.5% of SNDK shares in the Q1 2026 snapshot. The largest disclosed owners include FMR LLC, Morgan Stanley, Arrowstreet Capital, Limited Partnership. The ownership chart shows each group's share of total shares outstanding from the latest disclosed filings. Retail and other includes everyone who does not file, not a tracked group.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.