Westwood Holdings Group Inc
· Exited
−$38M
Change
−491K
Δ Own
−100.0%
Date
Q1 2026
IO
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Westwood Holdings Group Inc
· Exited
−$38M
Change
−491K
Δ Own
−100.0%
Date
Q1 2026
|
Westwood Holdings Group Inc | Exited· Q1 2026 | −$38M | −491K | −100.0% | Q1 2026 | |||||
|
Millennium Management LLC
· Reduced
−$37M
Change
−472K
Date
Q1 2026
|
Millennium Management LLC | Reduced· Q1 2026 | −$37M | −472K | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
+$34M
Change
+434K
Δ Own
+271.8%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | +$34M | +434K | +271.8% | Q1 2026 | |||||
|
UBS Group AG
· Added
+$33M
Change
+424K
Date
Q1 2026
|
UBS Group AG | Added· Q1 2026 | +$33M | +424K | – | Q1 2026 | |||||
|
Medina Value Partners, LLC
· Exited
−$29M
Change
−379K
Δ Own
−100.0%
Date
Q1 2026
|
Medina Value Partners, LLC | Exited· Q1 2026 | −$29M | −379K | −100.0% | Q1 2026 | |||||
|
Assenagon Asset Management S.A.
· Added
+$24M
Change
+313K
Date
Q1 2026
|
Assenagon Asset Management S.A. | Added· Q1 2026 | +$24M | +313K | – | Q1 2026 | |||||
|
BlackRock
· Added
+$17M
Change
+217K
Date
Q1 2026
|
BlackRock | Added· Q1 2026 | +$17M | +217K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
−$12M
Change
−159K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | −$12M | −159K | −100.0% | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
+$12M
Change
+148K
Δ Own
+203.9%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | +$12M | +148K | +203.9% | Q1 2026 | |||||
|
Nuveen, LLC
· Added
+$11M
Change
+141K
Date
Q1 2026
|
Nuveen, LLC | Added· Q1 2026 | +$11M | +141K | – | Q1 2026 | |||||
|
Norges
· Exited
−$11M
Change
−139K
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$11M | −139K | −100.0% | Q1 2026 | |||||
|
JPMorgan Chase & Co
· Added
+$9.4M
Change
+120K
Date
Q1 2026
|
JPMorgan Chase & Co | Added· Q1 2026 | +$9.4M | +120K | – | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
+$8.4M
Change
+108K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | +$8.4M | +108K | – | Q1 2026 | |||||
|
Walleye Capital LLC
· Exited
−$8.1M
Change
−104K
Δ Own
−100.0%
Date
Q1 2026
|
Walleye Capital LLC | Exited· Q1 2026 | −$8.1M | −104K | −100.0% | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· Added
+$6.7M
Change
+86K
Date
Q1 2026
|
Qube Research & Technologies Ltd | Added· Q1 2026 | +$6.7M | +86K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jones David B.
· Officer
Sell
−$78K
|
Jones David B. | Officer | Sell | $75.64 | −1K | −$78K | 15K | – | Mar 3, 2026 | Mar 3, 2026 | |||||||||
|
Blackmore Milton C.
· Director
Sell
−$45K
|
Blackmore Milton C. | Director | Sell | $76.56 | −594 | −$45K | 11K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Padfield Larry
· Director
Sell
−$45K
|
Padfield Larry | Director | Sell | $76.56 | −594 | −$45K | 9K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Poccia Claudia
· Director
Sell
−$9K
|
Poccia Claudia | Director | Sell | $76.56 | −119 | −$9K | 7K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Griffin Hardy Louis III
· Officer
Tax withholding or exercise payment (F)
-$31K
|
Griffin Hardy Louis III | Officer | Tax withholding or exercise payment (F) | $78.34 | -401 | -$31K | 10K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Landless David
· Director
Sell
−$45K
|
Landless David | Director | Sell | $76.56 | −594 | −$45K | 8K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Jones David B.
· Officer
Tax withholding or exercise payment (F)
-$69K
|
Jones David B. | Officer | Tax withholding or exercise payment (F) | $78.34 | -875 | -$69K | 16K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Barnes Corbin
· Officer
Tax withholding or exercise payment (F)
-$13K
|
Barnes Corbin | Officer | Tax withholding or exercise payment (F) | $78.34 | -166 | -$13K | 13K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Cleminson Ian
· Officer
Sell
−$182K
|
Cleminson Ian | Officer | Sell | $76.56 | −2K | −$182K | 20K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Williams Patrick
· Officer
Tax withholding or exercise payment (F)
-$624K
|
Williams Patrick | Officer | Tax withholding or exercise payment (F) | $78.34 | -8K | -$624K | 232K | – | Feb 27, 2026 | Mar 3, 2026 | |||||||||
|
Barnes Corbin
· Officer
Grant (A)
2K
|
Barnes Corbin | Officer | Grant (A) | – | 2K | – | 13K | – | Feb 23, 2026 | Feb 25, 2026 | |||||||||
|
Griffin Hardy Louis III
· Officer
Grant (A)
3K
|
Griffin Hardy Louis III | Officer | Grant (A) | – | 3K | – | 11K | – | Feb 23, 2026 | Feb 25, 2026 | |||||||||
|
Cleminson Ian
· Officer
Grant (A)
4K
|
Cleminson Ian | Officer | Grant (A) | – | 4K | – | 23K | – | Feb 23, 2026 | Feb 25, 2026 | |||||||||
|
Williams Patrick
· Officer
Grant (A)
21K
|
Williams Patrick | Officer | Grant (A) | – | 21K | – | 240K | – | Feb 23, 2026 | Feb 25, 2026 | |||||||||
|
Jones David B.
· Officer
Grant (A)
3K
|
Jones David B. | Officer | Grant (A) | – | 3K | – | 17K | – | Feb 23, 2026 | Feb 25, 2026 | |||||||||
N
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253 reporting institutions disclosed IOSP 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.