Berkshire Hathaway Inc
· Exited
−$724M
Change
−3.1M
Δ Own
−100.0%
Date
Q1 2026
PO
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Berkshire Hathaway Inc
· Exited
−$724M
Change
−3.1M
Δ Own
−100.0%
Date
Q1 2026
|
Berkshire Hathaway Inc | Exited· Q1 2026 | −$724M | −3.1M | −100.0% | Q1 2026 | |||||
|
Kayne Anderson Rudnick Investment Management LLC
· Added
+$257M
Change
+1.1M
Date
Q1 2026
|
Kayne Anderson Rudnick Investment Management LLC | Added· Q1 2026 | +$257M | +1.1M | – | Q1 2026 | |||||
|
Norges
· Exited
−$101M
Change
−427K
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$101M | −427K | −100.0% | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· New
+$84M
Change
+357K
Date
Q1 2026
|
Balyasny Asset Management L.P. | New· Q1 2026 | +$84M | +357K | – | Q1 2026 | |||||
|
Morgan Stanley
· Added
+$80M
Change
+338K
Date
Q1 2026
|
Morgan Stanley | Added· Q1 2026 | +$80M | +338K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Reduced
−$78M
Change
−329K
Δ Own
−48.1%
Date
Q1 2026
|
Citadel Advisors LLC | Reduced· Q1 2026 | −$78M | −329K | −48.1% | Q1 2026 | |||||
|
Wellington Management Group LLP
· Added
+$74M
Change
+313K
Δ Own
+12.3%
Date
Q1 2026
|
Wellington Management Group LLP | Added· Q1 2026 | +$74M | +313K | +12.3% | Q1 2026 | |||||
|
Adage Capital Partners Gp, L.L.C.
· Reduced
−$69M
Change
−291K
Date
Q1 2026
|
Adage Capital Partners Gp, L.L.C. | Reduced· Q1 2026 | −$69M | −291K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· New
+$66M
Change
+281K
Date
Q1 2026
|
Marshall Wace, LLP | New· Q1 2026 | +$66M | +281K | – | Q1 2026 | |||||
|
American Century Companies Inc
· Reduced
−$65M
Change
−276K
Date
Q1 2026
|
American Century Companies Inc | Reduced· Q1 2026 | −$65M | −276K | – | Q1 2026 | |||||
|
T. Rowe Price Investment Management, Inc.
· Added
+$58M
Change
+246K
Date
Q1 2026
|
T. Rowe Price Investment Management, Inc. | Added· Q1 2026 | +$58M | +246K | – | Q1 2026 | |||||
|
Nomura Asset Management International Inc.
· Exited
−$54M
Change
−231K
Δ Own
−100.0%
Date
Q1 2026
|
Nomura Asset Management International Inc. | Exited· Q1 2026 | −$54M | −231K | −100.0% | Q1 2026 | |||||
|
Jane Street Group, LLC
· Reduced
−$54M
Change
−228K
Date
Q1 2026
|
Jane Street Group, LLC | Reduced· Q1 2026 | −$54M | −228K | – | Q1 2026 | |||||
|
CIBC Bancorp USA Inc.
· Added
+$52M
Change
+222K
Date
Q1 2026
|
CIBC Bancorp USA Inc. | Added· Q1 2026 | +$52M | +222K | – | Q1 2026 | |||||
|
Invesco Ltd.
· Added
+$51M
Change
+218K
Δ Own
+26.0%
Date
Q1 2026
|
Invesco Ltd. | Added· Q1 2026 | +$51M | +218K | +26.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Whalen David G.
· Director
Other Form 4 events
$557
|
Whalen David G. | Director | Other Form 4 events | $185.60 | 3 | $557 | 9K | – | May 28, 2026 | Jun 1, 2026 | |||||||||
|
Perez de la Mesa Manuel J
· Director
Buy
+$1.8M
|
Perez de la Mesa Manuel J | Director | Buy | $175.95 | +10K | +$1.8M | 40K | – | May 13, 2026 | May 14, 2026 | |||||||||
|
Whalen David G.
· Director
Buy
+$100K
|
Whalen David G. | Director | Buy | $190.44 | +525 | +$100K | 9K | – | May 8, 2026 | May 12, 2026 | |||||||||
|
Perez de la Mesa Manuel J
· Director
Buy
+$1.9M
|
Perez de la Mesa Manuel J | Director | Buy | $190.00 | +10K | +$1.9M | 30K | – | May 7, 2026 | May 8, 2026 | |||||||||
|
Stokely John E.
· Director
Buy
+$193K
|
Stokely John E. | Director | Buy | $193.06 | +1K | +$193K | 16K | – | May 7, 2026 | May 8, 2026 | |||||||||
|
Hope James D.
· Director
Buy
+$90K
|
Hope James D. | Director | Buy | $194.41 | +464 | +$90K | 4K | – | May 7, 2026 | May 8, 2026 | |||||||||
|
Watwood John Bruce
· Officer
2 operations
13K
|
Watwood John Bruce | Officer | 2 operations | – | 13K | – | 21K | – | May 4, 2026 | May 5, 2026 | |||||||||
|
Whalen David G.
· Director
Grant (A)
644
|
Whalen David G. | Director | Grant (A) | – | 644 | – | 8K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Stokely John E.
· Director
Grant (A)
644
|
Stokely John E. | Director | Grant (A) | – | 644 | – | 15K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Pompa Mark A.
· Director
Grant (A)
1K
|
Pompa Mark A. | Director | Grant (A) | – | 1K | – | 1K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Oler Debra Sue
· Director
Grant (A)
644
|
Oler Debra Sue | Director | Grant (A) | – | 644 | – | 4K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Murphy Kevin Michael
· Director
Grant (A)
644
|
Murphy Kevin Michael | Director | Grant (A) | – | 644 | – | 1K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Hope James D.
· Director
Grant (A)
644
|
Hope James D. | Director | Grant (A) | – | 644 | – | 3K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Gervasi Martha S.
· Director
Grant (A)
644
|
Gervasi Martha S. | Director | Grant (A) | – | 644 | – | 3K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
|
Perez de la Mesa Manuel J
· Director
Grant (A)
3K
|
Perez de la Mesa Manuel J | Director | Grant (A) | – | 3K | – | 3K | – | Apr 29, 2026 | Apr 30, 2026 | |||||||||
N
M
G
A
A
M
634 reporting institutions disclosed POOL 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.