Norges
· Exited
−$2.6B
Change
−5.0M
Δ Own
−100.0%
Date
Q1 2026
IS
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Norges
· Exited
−$2.6B
Change
−5.0M
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$2.6B | −5.0M | −100.0% | Q1 2026 | |||||
|
J. Stern & Co. LLP
· Reduced
−$1.1B
Change
−2.1M
Date
Q1 2026
|
J. Stern & Co. LLP | Reduced· Q1 2026 | −$1.1B | −2.1M | – | Q1 2026 | |||||
|
FMR LLC
· Reduced
−$557M
Change
−1.1M
Δ Own
−16.7%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | −$557M | −1.1M | −16.7% | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
−$540M
Change
−1.1M
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | −$540M | −1.1M | −100.0% | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Added
+$520M
Change
+1.0M
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Added· Q1 2026 | +$520M | +1.0M | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
+$479M
Change
+945K
Δ Own
+205.6%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | +$479M | +945K | +205.6% | Q1 2026 | |||||
|
Holocene Advisors, LP
· Added
+$446M
Change
+881K
Date
Q1 2026
|
Holocene Advisors, LP | Added· Q1 2026 | +$446M | +881K | – | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Reduced
−$369M
Change
−730K
Δ Own
−55.9%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | −$369M | −730K | −55.9% | Q1 2026 | |||||
|
Barclays PLC
· Reduced
−$325M
Change
−643K
Date
Q1 2026
|
Barclays PLC | Reduced· Q1 2026 | −$325M | −643K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Reduced
−$292M
Change
−577K
Date
Q1 2026
|
Millennium Management LLC | Reduced· Q1 2026 | −$292M | −577K | – | Q1 2026 | |||||
|
Wellington Management Group LLP
· Added
+$260M
Change
+513K
Δ Own
+14.9%
Date
Q1 2026
|
Wellington Management Group LLP | Added· Q1 2026 | +$260M | +513K | +14.9% | Q1 2026 | |||||
|
JPMorgan Chase & Co
· Added
+$260M
Change
+513K
Date
Q1 2026
|
JPMorgan Chase & Co | Added· Q1 2026 | +$260M | +513K | – | Q1 2026 | |||||
|
Alyeska Investment Group, L.P.
· New
+$254M
Change
+501K
Date
Q1 2026
|
Alyeska Investment Group, L.P. | New· Q1 2026 | +$254M | +501K | – | Q1 2026 | |||||
|
CIBC Bancorp USA Inc.
· Added
+$227M
Change
+449K
Date
Q1 2026
|
CIBC Bancorp USA Inc. | Added· Q1 2026 | +$227M | +449K | – | Q1 2026 | |||||
|
BlackRock
· Reduced
−$223M
Change
−440K
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | −$223M | −440K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Rosa David J.
· Director
2 operations
0
|
Rosa David J. | Director | 2 operations | – | 0 | – | 6K | – | Jul 10, 2026 | Jul 13, 2026 | |||||||||
|
Rosa David J.
· Director
Tax withholding or exercise payment (F)
-$390K
|
Rosa David J. | Director | Tax withholding or exercise payment (F) | $411.55 | -947 | -$390K | 247K | −0.4% | Jul 10, 2026 | Jul 13, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$10K
|
Brosius Mark | Officer | Sell | $414.13 | −25 | −$10K | 1K | – | Jun 12, 2026 | Jun 12, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$9K
|
Brosius Mark | Officer | Sell | $412.16 | −23 | −$9K | 1K | – | Jun 11, 2026 | Jun 12, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$10K
|
Brosius Mark | Officer | Sell | $424.14 | −23 | −$10K | 1K | – | Jun 10, 2026 | Jun 10, 2026 | |||||||||
|
Loeb Gary
· Officer
Sell
−$170K
|
Loeb Gary | Officer | Sell | $424.14 | −400 | −$170K | 6K | – | Jun 10, 2026 | Jun 10, 2026 | |||||||||
|
Rosa David J.
· Director
2 operations
0
|
Rosa David J. | Director | 2 operations | – | 0 | – | 1K | – | Jun 10, 2026 | Jun 10, 2026 | |||||||||
|
Rosa David J.
· Director
Tax withholding or exercise payment (F)
-$288K
|
Rosa David J. | Director | Tax withholding or exercise payment (F) | $426.61 | -674 | -$288K | 246K | – | Jun 10, 2026 | Jun 10, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$10K
|
Brosius Mark | Officer | Sell | $421.13 | −23 | −$10K | 1K | – | Jun 9, 2026 | Jun 10, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$10K
|
Brosius Mark | Officer | Sell | $420.12 | −23 | −$10K | 2K | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Jeddi Iman
· Officer
Sell
−$2.4M
|
Jeddi Iman | Officer | Sell | $420.55 | −6K | −$2.4M | 6K | – | Jun 1, 2026 | Jun 2, 2026 | |||||||||
|
Jeddi Iman
· Officer
2 operations
0
|
Jeddi Iman | Officer | 2 operations | $77.00 | 0 | – | 0 | – | Jun 1, 2026 | Jun 2, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$8K
|
Brosius Mark | Officer | Sell | $439.80 | −18 | −$8K | 2K | – | May 22, 2026 | May 22, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$8K
|
Brosius Mark | Officer | Sell | $446.04 | −18 | −$8K | 2K | – | May 21, 2026 | May 22, 2026 | |||||||||
|
Brosius Mark
· Officer
Sell
−$8K
|
Brosius Mark | Officer | Sell | $440.38 | −18 | −$8K | 2K | – | May 20, 2026 | May 20, 2026 | |||||||||
A
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A
A
2,219 reporting institutions disclosed ISRG 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.