Peconic Partners LLC
· Added
+$536M
Change
+2.0M
Date
Q1 2026
MT
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Peconic Partners LLC
· Added
+$536M
Change
+2.0M
Date
Q1 2026
|
Peconic Partners LLC | Added· Q1 2026 | +$536M | +2.0M | – | Q1 2026 | |||||
|
Lone Pine Capital LLC
· New
+$415M
Change
+1.5M
Date
Q1 2026
|
Lone Pine Capital LLC | New· Q1 2026 | +$415M | +1.5M | – | Q1 2026 | |||||
|
Canada Pension Plan Investment Board
· Added
+$132M
Change
+489K
Date
Q1 2026
|
Canada Pension Plan Investment Board | Added· Q1 2026 | +$132M | +489K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
+$70M
Change
+259K
Δ Own
+1215.5%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | +$70M | +259K | +1215.5% | Q1 2026 | |||||
|
Westfield Capital Management Co LP
· New
+$68M
Change
+250K
Date
Q1 2026
|
Westfield Capital Management Co LP | New· Q1 2026 | +$68M | +250K | – | Q1 2026 | |||||
|
Bessemer Group Inc
· Added
+$62M
Change
+229K
Date
Q1 2026
|
Bessemer Group Inc | Added· Q1 2026 | +$62M | +229K | – | Q1 2026 | |||||
|
Anomaly Capital Management, LP
· New
+$61M
Change
+224K
Date
Q1 2026
|
Anomaly Capital Management, LP | New· Q1 2026 | +$61M | +224K | – | Q1 2026 | |||||
|
BlackRock
· Added
+$54M
Change
+198K
Date
Q1 2026
|
BlackRock | Added· Q1 2026 | +$54M | +198K | – | Q1 2026 | |||||
|
Geode
· Added
+$41M
Change
+151K
Date
Q1 2026
|
Geode | Added· Q1 2026 | +$41M | +151K | – | Q1 2026 | |||||
|
BNP Paribas Financial Markets
· Added
+$39M
Change
+142K
Date
Q1 2026
|
BNP Paribas Financial Markets | Added· Q1 2026 | +$39M | +142K | – | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· Added
+$34M
Change
+125K
Date
Q1 2026
|
Qube Research & Technologies Ltd | Added· Q1 2026 | +$34M | +125K | – | Q1 2026 | |||||
|
Goldman Sachs Group Inc
· Added
+$34M
Change
+124K
Date
Q1 2026
|
Goldman Sachs Group Inc | Added· Q1 2026 | +$34M | +124K | – | Q1 2026 | |||||
|
Vanguard
· Added
+$31M
Change
+115K
Date
Q1 2026
|
Vanguard | Added· Q1 2026 | +$31M | +115K | – | Q1 2026 | |||||
|
Newbrook Capital Advisors LP
· New
+$31M
Change
+113K
Date
Q1 2026
|
Newbrook Capital Advisors LP | New· Q1 2026 | +$31M | +113K | – | Q1 2026 | |||||
|
Thorntree Capital Partners LP
· New
+$31M
Change
+113K
Date
Q1 2026
|
Thorntree Capital Partners LP | New· Q1 2026 | +$31M | +113K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Csiszar Ernst N.
· Director
Sell
−$2.4M
|
Csiszar Ernst N. | Director | Sell | $371.17 | −6K | −$2.4M | 11K | – | Jun 3, 2026 | Jun 5, 2026 | |||||||||
|
Csiszar Ernst N.
· Director
Tax withholding or exercise payment (F)
-$10K
|
Csiszar Ernst N. | Director | Tax withholding or exercise payment (F) | $434.77 | -23 | -$10K | 17K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Csiszar Ernst N.
· Director
Grant (A)
104
|
Csiszar Ernst N. | Director | Grant (A) | – | 104 | – | 17K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Dwyer Robert J.
· Director
Tax withholding or exercise payment (F)
-$9K
|
Dwyer Robert J. | Director | Tax withholding or exercise payment (F) | $434.77 | -21 | -$9K | 21K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Dwyer Robert J.
· Director
Grant (A)
95
|
Dwyer Robert J. | Director | Grant (A) | – | 95 | – | 21K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Parker Ava L.
· Director
Tax withholding or exercise payment (F)
-$6K
|
Parker Ava L. | Director | Tax withholding or exercise payment (F) | $434.77 | -14 | -$6K | 5K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Parker Ava L.
· Director
Grant (A)
121
|
Parker Ava L. | Director | Grant (A) | – | 121 | – | 5K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Campbell C. Robert
· Director
Grant (A)
95
|
Campbell C. Robert | Director | Grant (A) | – | 95 | – | 31K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Palomarez Javier Alberto
· Director
Tax withholding or exercise payment (F)
-$9K
|
Palomarez Javier Alberto | Director | Tax withholding or exercise payment (F) | $434.77 | -21 | -$9K | 11K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Palomarez Javier Alberto
· Director
Grant (A)
95
|
Palomarez Javier Alberto | Director | Grant (A) | – | 95 | – | 11K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Johnson Julia L.
· Director
Grant (A)
95
|
Johnson Julia L. | Director | Grant (A) | – | 95 | – | 73K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Campbell C. Robert
· Director
Sell
−$1.3M
|
Campbell C. Robert | Director | Sell | $417.00 | −3K | −$1.3M | 31K | – | May 4, 2026 | May 6, 2026 | |||||||||
|
Palomarez Javier Alberto
· Director
Sell
−$309K
|
Palomarez Javier Alberto | Director | Sell | $325.43 | −950 | −$309K | 11K | – | Mar 25, 2026 | Mar 27, 2026 | |||||||||
|
Dimarco Paul
· Officer
Grant (A)
9K
|
Dimarco Paul | Officer | Grant (A) | – | 9K | – | 67K | – | Mar 18, 2026 | Mar 20, 2026 | |||||||||
|
Apple Robert E.
· Officer
Grant (A)
12K
|
Apple Robert E. | Officer | Grant (A) | – | 12K | – | 184K | – | Mar 18, 2026 | Mar 20, 2026 | |||||||||
N
M
A
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A
M
745 reporting institutions disclosed MTZ 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.