Ken Griffin’s Matrix Service MTRX Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $125K | Sell |
10,900
-10,700
| -50% | -$127K | ﹤0.01% | 11839 |
|
|
2025
Q4 | $253K | Buy |
21,600
+8,000
| +59% | +$101K | ﹤0.01% | 10523 |
|
|
2025
Q3 | $178K | Sell |
13,600
-58,400
| -81% | -$830K | ﹤0.01% | 11383 |
|
|
2025
Q2 | $973K | Sell |
72,000
-5,500
| -7% | -$66.4K | ﹤0.01% | 7158 |
|
|
2025
Q1 | $963K | Buy |
77,500
+75,500
| +3,775% | +$1.01M | ﹤0.01% | 7041 |
|
|
2024
Q4 | $23.9K | Sell |
2,000
-2,100
| -51% | -$25.7K | ﹤0.01% | 13055 |
|
|
2024
Q3 | $47.3K | Sell |
4,100
-38,700
| -90% | -$384K | ﹤0.01% | 11973 |
|
|
2024
Q2 | $425K | Buy |
42,800
+14,700
| +52% | +$168K | ﹤0.01% | 8391 |
|
|
2024
Q1 | $366K | Buy |
28,100
+14,000
| +99% | +$157K | ﹤0.01% | 9035 |
|
|
2023
Q4 | $138K | Sell |
14,100
-8,300
| -37% | -$90.1K | ﹤0.01% | 10516 |
|
|
2023
Q3 | $264K | Buy |
22,400
+21,400
| +2,140% | +$162K | ﹤0.01% | 9385 |
|
|
2023
Q2 | $5.89K | Buy |
1,000
+300
| +43% | +$1.64K | ﹤0.01% | 13463 |
|
|
2023
Q1 | $3.78K | Sell |
700
-600
| -46% | -$4.17K | ﹤0.01% | 14008 |
|
|
2022
Q4 | $8.09K | Buy |
+1,300
| New | +$6.72K | ﹤0.01% | 13770 |
|
|
2021
Q1 | – | Sell |
-12,500
| Closed | -$138K | – | 13532 |
|
|
2020
Q4 | $138K | Buy |
+12,500
| New | +$115K | ﹤0.01% | 9998 |
|
|
2018
Q4 | – | Sell |
-16,200
| Closed | -$399K | – | 9535 |
|
|
2018
Q3 | $399K | Buy |
+16,200
| New | +$342K | ﹤0.01% | 7073 |
|
|
2017
Q3 | – | Sell |
-10,100
| Closed | -$94K | – | 7842 |
|
|
2017
Q2 | $94K | Buy |
+10,100
| New | +$113K | ﹤0.01% | 6930 |
|
|
2016
Q1 | – | Sell |
-6,200
| Closed | -$127K | – | 7543 |
|
|
2015
Q4 | $127K | Buy |
6,200
+2,500
| +68% | +$56.1K | ﹤0.01% | 6418 |
|
|
2015
Q3 | $83K | Sell |
3,700
-1,500
| -29% | -$30.4K | ﹤0.01% | 7149 |
|
|
2015
Q2 | $95K | Buy |
5,200
+3,300
| +174% | +$64.7K | ﹤0.01% | 7123 |
|
|
2015
Q1 | $33K | Sell |
1,900
-2,400
| -56% | -$45.2K | ﹤0.01% | 7638 |
|
|
2014
Q4 | $96K | Sell |
4,300
-3,700
| -46% | -$83.2K | ﹤0.01% | 6669 |
|
|
2014
Q3 | $193K | Buy |
8,000
+300
| +4% | +$8.33K | ﹤0.01% | 5765 |
|
|
2014
Q2 | $252K | Buy |
7,700
+100
| +1% | +$3.3K | ﹤0.01% | 5291 |
|
|
2014
Q1 | $257K | Sell |
7,600
-2,800
| -27% | -$83.8K | ﹤0.01% | 5209 |
|
|
2013
Q4 | $254K | Buy |
10,400
+1,300
| +14% | +$27.7K | ﹤0.01% | 4772 |
|
|
2013
Q3 | $179K | Buy |
9,100
+7,700
| +550% | +$129K | ﹤0.01% | 4866 |
|
|
2013
Q2 | $22K | Buy |
+1,400
| New | +$22K | ﹤0.01% | 6031 |
|
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Ken Griffin's MTRX Position: Q1 2026 in Review
Ken Griffin increased its Matrix Service (MTRX) stake by 107% in Q1 2026, buying an estimated $2.9M and bringing the position to 472,047 shares worth $5.42M. The position accounts for ﹤0.01% of the portfolio, ranked #4219.
Ken Griffin first reported a position in MTRX in Q2 2013 and has held it in 46 quarters since. 144 funds tracked by Wall St. Rank hold MTRX as of Q1 2026.
- Ken Griffin held 472,047 shares of Matrix Service worth $5.42M as of Q1 2026.
- Ken Griffin bought 243,638 Matrix Service shares in Q1 2026, an estimated $2.9M.
- Matrix Service made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #4219 holding.
- Ken Griffin first reported a position in Matrix Service in Q2 2013 and has held it in 46 quarters since.
- 144 funds tracked by Wall St. Rank held Matrix Service as of Q1 2026.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.