California State Teachers Retirement System (CalSTRS)
TUSK icon

California State Teachers Retirement System (CalSTRS)’s Mammoth Energy Services TUSK Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio TUSK Stock Details TUSK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-1,487
Closed -$2.75K – 3048
2025
Q4 		$2.75K Sell
1,487
-275
-16% -$555 ﹤0.01% 3012
2025
Q3 		$4.04K Buy
1,762
+1
+0.1% +$2 ﹤0.01% 3001
2025
Q2 		$4.93K Hold
1,761
– – ﹤0.01% 2907
2025
Q1 		$3.59K Hold
1,761
– – ﹤0.01% 2960
2024
Q4 		$5.28K Hold
1,761
– – ﹤0.01% 2987
2024
Q3 		$7.2K Hold
1,761
– – ﹤0.01% 2959
2024
Q2 		$5.78K Sell
1,761
-581
-25% -$1.99K ﹤0.01% 3019
2024
Q1 		$8.53K Sell
2,342
-1,493
-39% -$5.63K ﹤0.01% 2938
2023
Q4 		$17.1K Sell
3,835
-1,306
-25% -$5.79K ﹤0.01% 2931
2023
Q3 		$23.9K Sell
5,141
-2,609
-34% -$12.7K ﹤0.01% 2949
2023
Q2 		$37.4K Buy
+7,750
New +$32.1K ﹤0.01% 3002
2020
Q2 		– Sell
-19,518
Closed -$15K – 3087
2020
Q1 		$15K Buy
19,518
+231
+1% +$304 ﹤0.01% 2980
2019
Q4 		$42K Hold
19,287
– – ﹤0.01% 2985
2019
Q3 		$48K Hold
19,287
– – ﹤0.01% 2993
2019
Q2 		$133K Hold
19,287
– – ﹤0.01% 2945
2019
Q1 		$321K Sell
19,287
-2,030
-10% -$43.3K ﹤0.01% 2553
2018
Q4 		$383K Buy
21,317
+2,292
+12% +$56.3K ﹤0.01% 2446
2018
Q3 		$554K Buy
19,025
+6,051
+47% +$199K ﹤0.01% 2398
2018
Q2 		$441K Buy
12,974
+717
+6% +$25.2K ﹤0.01% 2519
2018
Q1 		$393K Sell
12,257
-543
-4% -$13.6K ﹤0.01% 2491
2017
Q4 		$251K Sell
12,800
-400
-3% -$7.29K ﹤0.01% 2747
2017
Q3 		$223K Sell
13,200
-1,100
-8% -$16.1K ﹤0.01% 2848
2017
Q2 		$266K Sell
14,300
-1,100
-7% -$20.5K ﹤0.01% 2825
2017
Q1 		$331K Sell
15,400
-800
-5% -$15.3K ﹤0.01% 2688
2016
Q4 		$246K Buy
+16,200
New +$240K ﹤0.01% 2819

Other funds holding TUSK

WC
Wexford Capital West Palm Beach, Florida $690M AUM 57.92% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
PLC
Peapod Lane Capital Bedford Hills, New York $148M AUM 89.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
BCM
Bridgeway Capital Management Houston, Texas $4.97B AUM 44.96% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

California State Teachers Retirement System (CalSTRS)'s TUSK Position: Q1 2026 in Review

California State Teachers Retirement System (CalSTRS) sold out of Mammoth Energy Services (TUSK) in Q1 2026, closing a stake of 1,487 shares — an estimated $2.75K sold.

California State Teachers Retirement System (CalSTRS) first reported a position in TUSK in Q4 2016 and held it in 25 quarters. The position peaked at $554K in Q3 2018. 90 funds tracked by Wall St. Rank hold TUSK as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) reported no remaining Mammoth Energy Services position as of Q1 2026 after selling out during the quarter.
  • California State Teachers Retirement System (CalSTRS) sold 1,487 Mammoth Energy Services shares in Q1 2026, an estimated $2.75K.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Mammoth Energy Services in Q4 2016 and held it in 25 quarters.
  • California State Teachers Retirement System (CalSTRS)'s Mammoth Energy Services position peaked at $554K in Q3 2018.
  • 90 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q1 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q1 2026, filed 18 May 2026.