FMR LLC
· Reduced
−$86M
Change
−3.6M
Δ Own
−34.1%
Date
Q1 2026
CS
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
FMR LLC
· Reduced
−$86M
Change
−3.6M
Δ Own
−34.1%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | −$86M | −3.6M | −34.1% | Q1 2026 | |||||
|
Nut Tree Capital Management, LP
· Exited
−$77M
Change
−3.2M
Δ Own
−100.0%
Date
Q1 2026
|
Nut Tree Capital Management, LP | Exited· Q1 2026 | −$77M | −3.2M | −100.0% | Q1 2026 | |||||
|
Millennium Management LLC
· Reduced
−$67M
Change
−2.8M
Date
Q1 2026
|
Millennium Management LLC | Reduced· Q1 2026 | −$67M | −2.8M | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Added
+$66M
Change
+2.8M
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Added· Q1 2026 | +$66M | +2.8M | – | Q1 2026 | |||||
|
Encompass Capital Advisors LLC
· Reduced
−$52M
Change
−2.2M
Date
Q1 2026
|
Encompass Capital Advisors LLC | Reduced· Q1 2026 | −$52M | −2.2M | – | Q1 2026 | |||||
|
Alliancebernstein L.P.
· Added
+$52M
Change
+2.2M
Date
Q1 2026
|
Alliancebernstein L.P. | Added· Q1 2026 | +$52M | +2.2M | – | Q1 2026 | |||||
|
Healthcare of Ontario Pension Plan Trust Fund
· Added
+$44M
Change
+1.8M
Date
Q1 2026
|
Healthcare of Ontario Pension Plan Trust Fund | Added· Q1 2026 | +$44M | +1.8M | – | Q1 2026 | |||||
|
Westwood Holdings Group Inc
· New
+$33M
Change
+1.4M
Date
Q1 2026
|
Westwood Holdings Group Inc | New· Q1 2026 | +$33M | +1.4M | – | Q1 2026 | |||||
|
Kinetic Partners Management, LP
· New
+$31M
Change
+1.3M
Date
Q1 2026
|
Kinetic Partners Management, LP | New· Q1 2026 | +$31M | +1.3M | – | Q1 2026 | |||||
|
Capstone Investment Advisors, LLC
· Exited
−$28M
Change
−1.2M
Δ Own
−100.0%
Date
Q1 2026
|
Capstone Investment Advisors, LLC | Exited· Q1 2026 | −$28M | −1.2M | −100.0% | Q1 2026 | |||||
|
William Blair Investment Management, LLC
· New
+$22M
Change
+918K
Date
Q1 2026
|
William Blair Investment Management, LLC | New· Q1 2026 | +$22M | +918K | – | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
+$22M
Change
+911K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | +$22M | +911K | – | Q1 2026 | |||||
|
Bayberry Capital Partners LP
· New
+$21M
Change
+874K
Date
Q1 2026
|
Bayberry Capital Partners LP | New· Q1 2026 | +$21M | +874K | – | Q1 2026 | |||||
|
Bridgeway Capital Management, LLC
· Reduced
−$21M
Change
−872K
Date
Q1 2026
|
Bridgeway Capital Management, LLC | Reduced· Q1 2026 | −$21M | −872K | – | Q1 2026 | |||||
|
BlackRock
· Reduced
−$18M
Change
−766K
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | −$18M | −766K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Joerg Ingrid
· Director
Tax withholding or exercise payment (F)
-$87K
|
Joerg Ingrid | Director | Tax withholding or exercise payment (F) | $29.28 | -3K | -$87K | 406K | −0.7% | Jul 10, 2026 | Jul 13, 2026 | |||||||||
|
Ormerod John
· Director
Sell
−$280K
|
Ormerod John | Director | Sell | $35.01 | −8K | −$280K | 25K | – | Jun 4, 2026 | Jun 8, 2026 | |||||||||
|
Becker Marcus
· Officer
Sell
−$363K
|
Becker Marcus | Officer | Sell | $34.93 | −10K | −$363K | 17K | – | May 28, 2026 | Jun 1, 2026 | |||||||||
|
Soultz Bradley Lee
· Director
Buy
+$85K
|
Soultz Bradley Lee | Director | Buy | $33.84 | +2K | +$85K | 2K | – | May 14, 2026 | May 18, 2026 | |||||||||
|
Jarrett Martin
· Officer
Sell
−$158K
|
Jarrett Martin | Officer | Sell | $33.46 | −5K | −$158K | 15K | – | May 14, 2026 | May 18, 2026 | |||||||||
|
Piquier Ludovic
· Officer
Sell
−$34K
|
Piquier Ludovic | Officer | Sell | $33.57 | −1K | −$34K | 242K | – | May 12, 2026 | May 13, 2026 | |||||||||
|
Brun Nicolas
· Officer
Sell
−$902K
|
Brun Nicolas | Officer | Sell | $33.85 | −27K | −$902K | 105K | – | May 11, 2026 | May 12, 2026 | |||||||||
|
Corre Stephane
· Officer
Sell
−$168K
|
Corre Stephane | Officer | Sell | $33.52 | −5K | −$168K | 62K | – | May 8, 2026 | May 12, 2026 | |||||||||
|
Brandjes Michiel
· Director
Sell
−$325K
|
Brandjes Michiel | Director | Sell | $31.25 | −10K | −$325K | 42K | – | May 5, 2026 | May 7, 2026 | |||||||||
|
Guo Jack Q.
· Officer
Sell
−$822K
|
Guo Jack Q. | Officer | Sell | $32.62 | −25K | −$822K | 185K | – | May 5, 2026 | May 7, 2026 | |||||||||
|
Hoffmann Philippe
· Officer
Sell
−$1.6M
|
Hoffmann Philippe | Officer | Sell | $31.92 | −50K | −$1.6M | 144K | – | May 1, 2026 | May 5, 2026 | |||||||||
|
Jurkovic Philip Ryan
· Officer
Sell
−$1.6M
|
Jurkovic Philip Ryan | Officer | Sell | $32.01 | −49K | −$1.6M | 172K | – | May 1, 2026 | May 4, 2026 | |||||||||
|
Corre Stephane
· Officer
Sell
−$160K
|
Corre Stephane | Officer | Sell | $32.04 | −5K | −$160K | 67K | – | May 1, 2026 | May 4, 2026 | |||||||||
|
Deslarzes Jean-Christophe
· Director
Buy
+$41K
|
Deslarzes Jean-Christophe | Director | Buy | $31.13 | +1K | +$41K | 42K | – | May 1, 2026 | May 1, 2026 | |||||||||
|
Becker Marcus
· Officer
Sell
−$251K
|
Becker Marcus | Officer | Sell | $25.09 | −10K | −$251K | 27K | – | Mar 16, 2026 | Mar 17, 2026 | |||||||||
N
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294 reporting institutions disclosed CSTM position changes in the Q1 2026 snapshot.
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.