BlackRock
· Reduced
Change
−1.7M
Date
Q1 2026
MT
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
BlackRock
· Reduced
Change
−1.7M
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | – | −1.7M | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+437K
Δ Own
+217.7%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +437K | +217.7% | Q1 2026 | |||||
|
Marshall Wace, LLP
· Added
Change
+282K
Date
Q1 2026
|
Marshall Wace, LLP | Added· Q1 2026 | – | +282K | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Reduced
Change
−262K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Reduced· Q1 2026 | – | −262K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
Change
+244K
Δ Own
+106.7%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | – | +244K | +106.7% | Q1 2026 | |||||
|
Oberweis Asset Management Inc/
· Exited
Change
−227K
Δ Own
−100.0%
Date
Q1 2026
|
Oberweis Asset Management Inc/ | Exited· Q1 2026 | – | −227K | −100.0% | Q1 2026 | |||||
|
Congruence Capital, LLC
· Added
Change
+211K
Date
Q1 2026
|
Congruence Capital, LLC | Added· Q1 2026 | – | +211K | – | Q1 2026 | |||||
|
First Eagle Investment Management, LLC
· Added
Change
+211K
Δ Own
+32.9%
Date
Q1 2026
|
First Eagle Investment Management, LLC | Added· Q1 2026 | – | +211K | +32.9% | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
Change
+204K
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | – | +204K | – | Q1 2026 | |||||
|
Centerbook Partners LP
· Reduced
Change
−203K
Date
Q1 2026
|
Centerbook Partners LP | Reduced· Q1 2026 | – | −203K | – | Q1 2026 | |||||
|
Stanley-Laman Group, Ltd.
· Exited
Change
−182K
Δ Own
−100.0%
Date
Q1 2026
|
Stanley-Laman Group, Ltd. | Exited· Q1 2026 | – | −182K | −100.0% | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
Change
+178K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +178K | – | Q1 2026 | |||||
|
Gendell Jeffrey L
· Added
Change
+174K
Date
Q1 2026
|
Gendell Jeffrey L | Added· Q1 2026 | – | +174K | – | Q1 2026 | |||||
|
AQR Capital Management LLC
· Added
Change
+134K
Date
Q1 2026
|
AQR Capital Management LLC | Added· Q1 2026 | – | +134K | – | Q1 2026 | |||||
|
Royce & Associates LP
· Exited
Change
−121K
Δ Own
−100.0%
Date
Q1 2026
|
Royce & Associates LP | Exited· Q1 2026 | – | −121K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Cavanah Kevin S.
· Officer
Sell
−$20K
|
Cavanah Kevin S. | Officer | Sell | $14.03 | −1K | −$20K | 87K | – | Jun 15, 2026 | Jun 15, 2026 | |||||||||
|
Cavanah Kevin S.
· Officer
Sell
−$29K
|
Cavanah Kevin S. | Officer | Sell | $14.00 | −2K | −$29K | 89K | – | Jun 12, 2026 | Jun 15, 2026 | |||||||||
|
Sheets Justin D.
· Officer
Sell
−$229K
|
Sheets Justin D. | Officer | Sell | $13.50 | −17K | −$229K | 64K | – | Jun 12, 2026 | Jun 15, 2026 | |||||||||
|
Cavanah Kevin S.
· Officer
Sell
−$92K
|
Cavanah Kevin S. | Officer | Sell | $14.13 | −7K | −$92K | 91K | – | Jun 5, 2026 | Jun 8, 2026 | |||||||||
|
Cavanah Kevin S.
· Officer
Sell
−$705K
|
Cavanah Kevin S. | Officer | Sell | $14.10 | −50K | −$705K | 97K | – | Jun 4, 2026 | Jun 8, 2026 | |||||||||
|
Cavanah Kevin S.
· Officer
Sell
−$774K
|
Cavanah Kevin S. | Officer | Sell | $12.90 | −60K | −$774K | 147K | – | May 26, 2026 | May 26, 2026 | |||||||||
|
Hewitt John R.
· Director
Sell
−$450K
|
Hewitt John R. | Director | Sell | $12.50 | −36K | −$450K | 582K | – | May 8, 2026 | May 12, 2026 | |||||||||
|
Austin Nancy E.
· Officer
Sell
−$47K
|
Austin Nancy E. | Officer | Sell | $11.29 | −4K | −$47K | 106K | – | Feb 18, 2026 | Feb 19, 2026 | |||||||||
|
Payne Shawn P.
· Officer
Sell
−$60K
|
Payne Shawn P. | Officer | Sell | $11.42 | −5K | −$60K | 102K | – | Nov 25, 2025 | Nov 25, 2025 | |||||||||
|
Payne Shawn P.
· Officer
Sell
−$34K
|
Payne Shawn P. | Officer | Sell | $11.42 | −3K | −$34K | 107K | – | Nov 20, 2025 | Nov 24, 2025 | |||||||||
|
Payne Shawn P.
· Officer
Sell
−$104K
|
Payne Shawn P. | Officer | Sell | $12.58 | −8K | −$104K | 110K | – | Nov 11, 2025 | Nov 12, 2025 | |||||||||
|
Carnes Martha Z.
· Director
Grant (A)
8K
|
Carnes Martha Z. | Director | Grant (A) | – | 8K | – | 71K | – | Nov 4, 2025 | Nov 5, 2025 | |||||||||
|
Miller James Harry
· Director
Grant (A)
8K
|
Miller James Harry | Director | Grant (A) | – | 8K | – | 92K | – | Nov 4, 2025 | Nov 5, 2025 | |||||||||
|
Hinrichs Liane K.
· Director
Grant (A)
8K
|
Hinrichs Liane K. | Director | Grant (A) | – | 8K | – | 64K | – | Nov 4, 2025 | Nov 5, 2025 | |||||||||
|
Conner Carlin G.
· Director
Grant (A)
8K
|
Conner Carlin G. | Director | Grant (A) | – | 8K | – | 55K | – | Nov 4, 2025 | Nov 5, 2025 | |||||||||
N
A
M
M
G
A
144 reporting institutions disclosed MTRX 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.