J. Stern & Co. LLP
· Reduced
−$3.0B
Change
−23.9M
Date
Q1 2026
ZT
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
J. Stern & Co. LLP
· Reduced
−$3.0B
Change
−23.9M
Date
Q1 2026
|
J. Stern & Co. LLP | Reduced· Q1 2026 | −$3.0B | −23.9M | – | Q1 2026 | |||||
|
Norges
· Exited
−$723M
Change
−5.8M
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$723M | −5.8M | −100.0% | Q1 2026 | |||||
|
Unisphere Establishment
· Reduced
−$248M
Change
−2.0M
Date
Q1 2026
|
Unisphere Establishment | Reduced· Q1 2026 | −$248M | −2.0M | – | Q1 2026 | |||||
|
BlackRock
· Reduced
−$219M
Change
−1.8M
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | −$219M | −1.8M | – | Q1 2026 | |||||
|
Principal Financial Group Inc
· Reduced
−$187M
Change
−1.5M
Date
Q1 2026
|
Principal Financial Group Inc | Reduced· Q1 2026 | −$187M | −1.5M | – | Q1 2026 | |||||
|
Polen Capital Management LLC
· Reduced
−$166M
Change
−1.3M
Date
Q1 2026
|
Polen Capital Management LLC | Reduced· Q1 2026 | −$166M | −1.3M | – | Q1 2026 | |||||
|
Morgan Stanley
· Reduced
−$164M
Change
−1.3M
Date
Q1 2026
|
Morgan Stanley | Reduced· Q1 2026 | −$164M | −1.3M | – | Q1 2026 | |||||
|
Wellington Management Group LLP
· Reduced
−$154M
Change
−1.2M
Δ Own
−10.9%
Date
Q1 2026
|
Wellington Management Group LLP | Reduced· Q1 2026 | −$154M | −1.2M | −10.9% | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Reduced
−$141M
Change
−1.1M
Δ Own
−93.8%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | −$141M | −1.1M | −93.8% | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Reduced
−$132M
Change
−1.1M
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Reduced· Q1 2026 | −$132M | −1.1M | – | Q1 2026 | |||||
|
Sarasin & Partners LLP
· Reduced
−$130M
Change
−1.0M
Date
Q1 2026
|
Sarasin & Partners LLP | Reduced· Q1 2026 | −$130M | −1.0M | – | Q1 2026 | |||||
|
First Trust Advisors LP
· Reduced
−$125M
Change
−1.0M
Date
Q1 2026
|
First Trust Advisors LP | Reduced· Q1 2026 | −$125M | −1.0M | – | Q1 2026 | |||||
|
Amundi
· Reduced
−$103M
Change
−835K
Date
Q1 2026
|
Amundi | Reduced· Q1 2026 | −$103M | −835K | – | Q1 2026 | |||||
|
Assenagon Asset Management S.A.
· Reduced
−$101M
Change
−816K
Date
Q1 2026
|
Assenagon Asset Management S.A. | Reduced· Q1 2026 | −$101M | −816K | – | Q1 2026 | |||||
|
Squarepoint Ops LLC
· Reduced
−$96M
Change
−777K
Date
Q1 2026
|
Squarepoint Ops LLC | Reduced· Q1 2026 | −$96M | −777K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sarbaugh Keith
· Officer
Grant (A)
$7K
|
Sarbaugh Keith | Officer | Grant (A) | $26.22 | 260 | $7K | 2K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Peck Kristin C.
· Director
Grant (A)
$16K
|
Peck Kristin C. | Director | Grant (A) | $26.22 | 616 | $16K | 66K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Nayak Abhay U.
· Officer
Grant (A)
$6K
|
Nayak Abhay U. | Officer | Grant (A) | $26.22 | 215 | $6K | 5K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Esch Kevin
· Officer
Grant (A)
$8K
|
Esch Kevin | Officer | Grant (A) | $26.22 | 308 | $8K | 806 | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Driscoll Rimma
· Officer
Grant (A)
$6K
|
Driscoll Rimma | Officer | Grant (A) | $26.22 | 238 | $6K | 6K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Fuller Julie
· Officer
Grant (A)
$8K
|
Fuller Julie | Officer | Grant (A) | $26.22 | 315 | $8K | 2K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Lagano Roxanne
· Officer
Grant (A)
$8K
|
Lagano Roxanne | Officer | Grant (A) | $26.22 | 315 | $8K | 31K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Ferran Astorga Jeannette
· Officer
Grant (A)
$1K
|
Ferran Astorga Jeannette | Officer | Grant (A) | $26.22 | 45 | $1K | 2K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Joseph Wetteny
· Officer
Grant (A)
$10K
|
Joseph Wetteny | Officer | Grant (A) | $26.22 | 363 | $10K | 10K | – | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Stetter Mark
· Director
Grant (A)
$25K
|
Stetter Mark | Director | Grant (A) | $78.71 | 318 | $25K | 534 | – | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
McCallister Michael B.
· Director
Gift (G)
-1K
|
McCallister Michael B. | Director | Gift (G) | – | -1K | – | 0 | – | Jun 10, 2026 | Jun 11, 2026 | |||||||||
|
Stetter Mark
· Director
2 operations
0
|
Stetter Mark | Director | 2 operations | – | 0 | – | 0 | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Parent Louise M.
· Director
4 operations
-1
|
Parent Louise M. | Director | 4 operations | – | -1 | – | 0 | – | May 20, 2026 | May 21, 2026 | |||||||||
|
Damelio Frank A.
· Director
Buy
+$501K
|
Damelio Frank A. | Director | Buy | $75.39 | +7K | +$501K | 21K | – | May 13, 2026 | May 13, 2026 | |||||||||
|
Bisaro Paul
· Director
Buy
+$152K
|
Bisaro Paul | Director | Buy | $75.88 | +2K | +$152K | 28K | – | May 13, 2026 | May 13, 2026 | |||||||||
M
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1,587 reporting institutions disclosed ZTS 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.