D. E. Shaw & Co., Inc.
· Reduced
−$42M
Change
−272K
Δ Own
−60.6%
Date
Q1 2026
MA
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
D. E. Shaw & Co., Inc.
· Reduced
−$42M
Change
−272K
Δ Own
−60.6%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | −$42M | −272K | −60.6% | Q1 2026 | |||||
|
Encompass Capital Advisors LLC
· New
+$31M
Change
+200K
Date
Q1 2026
|
Encompass Capital Advisors LLC | New· Q1 2026 | +$31M | +200K | – | Q1 2026 | |||||
|
American Century Companies Inc
· Added
+$28M
Change
+182K
Date
Q1 2026
|
American Century Companies Inc | Added· Q1 2026 | +$28M | +182K | – | Q1 2026 | |||||
|
Ameriprise Financial Inc
· Reduced
−$28M
Change
−181K
Date
Q1 2026
|
Ameriprise Financial Inc | Reduced· Q1 2026 | −$28M | −181K | – | Q1 2026 | |||||
|
Norges
· Exited
−$22M
Change
−140K
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$22M | −140K | −100.0% | Q1 2026 | |||||
|
Schonfeld Strategic Advisors LLC
· Added
+$19M
Change
+125K
Date
Q1 2026
|
Schonfeld Strategic Advisors LLC | Added· Q1 2026 | +$19M | +125K | – | Q1 2026 | |||||
|
FMR LLC
· Added
+$18M
Change
+113K
Δ Own
+53.3%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | +$18M | +113K | +53.3% | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· Added
+$17M
Change
+109K
Date
Q1 2026
|
Balyasny Asset Management L.P. | Added· Q1 2026 | +$17M | +109K | – | Q1 2026 | |||||
|
Silvercrest Asset Management Group LLC
· Reduced
−$16M
Change
−104K
Date
Q1 2026
|
Silvercrest Asset Management Group LLC | Reduced· Q1 2026 | −$16M | −104K | – | Q1 2026 | |||||
|
Vanguard
· Reduced
−$15M
Change
−96K
Date
Q1 2026
|
Vanguard | Reduced· Q1 2026 | −$15M | −96K | – | Q1 2026 | |||||
|
Steadfast Capital Management LP
· Exited
−$9.8M
Change
−63K
Δ Own
−100.0%
Date
Q1 2026
|
Steadfast Capital Management LP | Exited· Q1 2026 | −$9.8M | −63K | −100.0% | Q1 2026 | |||||
|
BlackRock
· Reduced
−$9.7M
Change
−62K
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | −$9.7M | −62K | – | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· Added
+$9.2M
Change
+59K
Date
Q1 2026
|
Qube Research & Technologies Ltd | Added· Q1 2026 | +$9.2M | +59K | – | Q1 2026 | |||||
|
Hudson Bay Capital Management LP
· Added
+$8.8M
Change
+57K
Date
Q1 2026
|
Hudson Bay Capital Management LP | Added· Q1 2026 | +$8.8M | +57K | – | Q1 2026 | |||||
|
Cerity Partners LLC
· Added
+$8.3M
Change
+53K
Date
Q1 2026
|
Cerity Partners LLC | Added· Q1 2026 | +$8.3M | +53K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Holland Jerome James
· Officer
Tax withholding or exercise payment (F)
-$13K
|
Holland Jerome James | Officer | Tax withholding or exercise payment (F) | $203.92 | -64 | -$13K | 5K | −1.2% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Scott Christopher A.
· Officer
Grant (A)
246
|
Scott Christopher A. | Officer | Grant (A) | – | 246 | – | 10K | +2.5% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Cox Matthew J.
· Director
3 operations
−$1.9M
Price
$191.81–$193.65
Qty
−10K
Owned
249K
ΔOwn
−3.9%
Trade date
Jun 29, 2026
Filed date
Jun 29, 2026
|
Cox Matthew J. | Director | 3 operations | $191.81–$193.65 | −10K | −$1.9M | 249K | −3.9% | Jun 29, 2026 | Jun 29, 2026 | |||||||||
|
Kuriyama Stanley M.
· Director
Gift (G)
-2K
|
Kuriyama Stanley M. | Director | Gift (G) | – | -2K | – | 50K | – | Jun 9, 2026 | Jun 11, 2026 | |||||||||
|
Rascon Laura L.
· Officer
5 operations
−$528K
|
Rascon Laura L. | Officer | 5 operations | $186.03–$190.75 | −3K | −$528K | 16K | – | Jun 8, 2026 | Jun 9, 2026 | |||||||||
|
Cox Matthew J.
· Director
5 operations
−$1.9M
|
Cox Matthew J. | Director | 5 operations | $186.13–$191.10 | −10K | −$1.9M | 259K | – | Jun 8, 2026 | Jun 9, 2026 | |||||||||
|
Cerocke Grace M.
· Officer
Sell
−$220K
|
Cerocke Grace M. | Officer | Sell | $183.57 | −1K | −$220K | 18K | – | May 28, 2026 | May 29, 2026 | |||||||||
|
Scott Christopher A.
· Officer
Sell
−$275K
|
Scott Christopher A. | Officer | Sell | $181.05 | −2K | −$275K | 10K | – | May 20, 2026 | May 21, 2026 | |||||||||
|
Taylor Jason Lee
· Officer
Sell
−$301K
|
Taylor Jason Lee | Officer | Sell | $182.24 | −2K | −$301K | 11K | – | May 14, 2026 | May 15, 2026 | |||||||||
|
Rascon Laura L.
· Officer
Sell
−$98K
|
Rascon Laura L. | Officer | Sell | $180.83 | −540 | −$98K | 18K | – | May 14, 2026 | May 15, 2026 | |||||||||
|
Park Kuuhaku T.
· Officer
Sell
−$450K
|
Park Kuuhaku T. | Officer | Sell | $180.19 | −2K | −$450K | 11K | – | May 12, 2026 | May 14, 2026 | |||||||||
|
Heilmann Peter T.
· Officer
Sell
−$1.3M
|
Heilmann Peter T. | Officer | Sell | $180.19 | −7K | −$1.3M | 26K | – | May 12, 2026 | May 14, 2026 | |||||||||
|
Scott Christopher A.
· Officer
Sell
−$595K
|
Scott Christopher A. | Officer | Sell | $180.14 | −3K | −$595K | 11K | – | May 8, 2026 | May 11, 2026 | |||||||||
|
Sullivan John Warren
· Officer
Sell
−$600K
|
Sullivan John Warren | Officer | Sell | $180.14 | −3K | −$600K | 10K | – | May 8, 2026 | May 11, 2026 | |||||||||
|
Tilden Bradley D.
· Director
Sell
−$290K
|
Tilden Bradley D. | Director | Sell | $181.85 | −2K | −$290K | 8K | – | May 8, 2026 | May 11, 2026 | |||||||||
M
G
A
A
N
A
352 reporting institutions disclosed MATX 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.