Ken Griffin
MTRX icon

Ken Griffin’s Matrix Service MTRX Stock Holding History

Ken Griffin’s Portfolio MTRX Stock Details MTRX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-900
Closed -$11.2K – 14135
2025
Q1 		$11.2K Sell
900
-4,300
-83% -$57.6K ﹤0.01% 13500
2024
Q4 		$62.2K Buy
5,200
+4,700
+940% +$57.6K ﹤0.01% 12139
2024
Q3 		$5.76K Hold
500
– – ﹤0.01% 13465
2024
Q2 		$4.96K Buy
500
+100
+25% +$1.14K ﹤0.01% 13445
2024
Q1 		$5.21K Sell
400
-1,200
-75% -$13.5K ﹤0.01% 13757
2023
Q4 		$15.6K Sell
1,600
-100
-6% -$1.09K ﹤0.01% 12829
2023
Q3 		$20.1K Buy
1,700
+900
+113% +$6.82K ﹤0.01% 12628
2023
Q2 		$4.71K Sell
800
-900
-53% -$4.92K ﹤0.01% 13577
2023
Q1 		$9.18K Buy
1,700
+1,500
+750% +$10.4K ﹤0.01% 13600
2022
Q4 		$1.24K Buy
+200
New +$1.03K ﹤0.01% 14504
2021
Q4 		– Sell
-66,600
Closed -$697K – 14407
2021
Q3 		$697K Sell
66,600
-1,000
-1% -$10.7K ﹤0.01% 9081
2021
Q2 		$710K Buy
+67,600
New +$816K ﹤0.01% 9218
2020
Q2 		– Sell
-14,400
Closed -$136K – 10248
2020
Q1 		$136K Buy
+14,400
New +$222K ﹤0.01% 8379
2016
Q1 		– Sell
-4,600
Closed -$94K – 7544
2015
Q4 		$94K Sell
4,600
-4,700
-51% -$105K ﹤0.01% 6763
2015
Q3 		$209K Buy
9,300
+2,200
+31% +$44.6K ﹤0.01% 6086
2015
Q2 		$130K Buy
7,100
+1,600
+29% +$31.3K ﹤0.01% 6814
2015
Q1 		$97K Sell
5,500
-200
-4% -$3.77K ﹤0.01% 6858
2014
Q4 		$127K Sell
5,700
-800
-12% -$18K ﹤0.01% 6432
2014
Q3 		$157K Sell
6,500
-1,300
-17% -$36.1K ﹤0.01% 5983
2014
Q2 		$256K Buy
7,800
+2,300
+42% +$75.9K ﹤0.01% 5268
2014
Q1 		$186K Buy
5,500
+2,300
+72% +$68.9K ﹤0.01% 5589
2013
Q4 		$78K Sell
3,200
-900
-22% -$19.2K ﹤0.01% 5789
2013
Q3 		$80K Buy
4,100
+3,000
+273% +$50.3K ﹤0.01% 5494
2013
Q2 		$17K Buy
+1,100
New +$17.3K ﹤0.01% 6109

Other funds holding MTRX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
NIM
Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return
GJL
Gendell Jeffrey L $7.34B AUM 183.72% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
WCM
Westerly Capital Management San Francisco, California $368M AUM 42.67% 1-Year Est. Return
HP
Harvey Partners Tarrytown, New York $1.26B AUM 64.44% 1-Year Est. Return
First Eagle Investment Management
First Eagle Investment Management New York $59.9B AUM 27.01% 1-Year Est. Return
ACM
Azarias Capital Management Berwyn, Pennsylvania $230M AUM 39.35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

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.