Citadel Advisors
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Citadel Advisors’s Mammoth Energy Services TUSK Stock Holding History

Citadel Advisors’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
Q2 		$1.47M Buy
452,163
+120,796
+36% +$353K ﹤0.01% 7264
2026
Q1 		$812K Buy
331,367
+111,256
+51% +$253K ﹤0.01% 8146
2025
Q4 		$407K Sell
220,111
-48,204
-18% -$97.3K ﹤0.01% 9495
2025
Q3 		$614K Buy
268,315
+121,833
+83% +$300K ﹤0.01% 8626
2025
Q2 		$410K Sell
146,482
-37,589
-20% -$96.2K ﹤0.01% 9090
2025
Q1 		$376K Buy
184,071
+166,206
+930% +$443K ﹤0.01% 9098
2024
Q4 		$53.6K Sell
17,865
-47,425
-73% -$175K ﹤0.01% 12313
2024
Q3 		$267K Buy
65,290
+56,298
+626% +$206K ﹤0.01% 9557
2024
Q2 		$29.5K Buy
+8,992
New +$30.9K ﹤0.01% 12293
2023
Q4 		– Sell
-571
Closed -$2.53K – 15282
2023
Q3 		$2.65K Sell
571
-5,878
-91% -$28.6K ﹤0.01% 13694
2023
Q2 		$31.1K Sell
6,449
-60,277
-90% -$250K ﹤0.01% 12310
2023
Q1 		$282K Buy
66,726
+20,934
+46% +$125K ﹤0.01% 9504
2022
Q4 		$396K Sell
45,792
-4,089
-8% -$23.3K ﹤0.01% 8733
2022
Q3 		$170K Buy
49,881
+30,909
+163% +$108K ﹤0.01% 10579
2022
Q2 		$41K Buy
+18,972
New +$42.5K ﹤0.01% 12052
2021
Q2 		– Sell
-40,601
Closed -$216K – 14457
2021
Q1 		$216K Buy
40,601
+19,193
+90% +$97.1K ﹤0.01% 11548
2020
Q4 		$96K Buy
+21,408
New +$52.1K ﹤0.01% 10248
2020
Q2 		– Sell
-14,616
Closed -$11K – 10521
2020
Q1 		$11K Buy
+14,616
New +$19.3K ﹤0.01% 9413
2019
Q4 		– Sell
-10,361
Closed -$26K – 9787
2019
Q3 		$26K Sell
10,361
-1,391
-12% -$6.6K ﹤0.01% 8880
2019
Q2 		$81K Buy
+11,752
New +$149K ﹤0.01% 8595
2019
Q1 		– Sell
-44,455
Closed -$799K – 9872
2018
Q4 		$799K Sell
44,455
-193,708
-81% -$4.76M ﹤0.01% 5652
2018
Q3 		$6.93M Buy
238,163
+78,276
+49% +$2.58M ﹤0.01% 2575
2018
Q2 		$5.43M Buy
159,887
+128,891
+416% +$4.53M ﹤0.01% 2654
2018
Q1 		$993K Buy
+30,996
New +$775K ﹤0.01% 4817
2017
Q1 		– Sell
-19,601
Closed -$298K – 8062
2016
Q4 		$298K Buy
+19,601
New +$290K ﹤0.01% 5681

Other funds holding TUSK

WC
Wexford Capital West Palm Beach, Florida $782M AUM 62.56% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
PLC
Peapod Lane Capital Bedford Hills, New York $148M AUM 89.92% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
JHU
Johns Hopkins University Baltimore, Maryland $1.5B AUM 13.39% 1-Year Est. Return
BCM
Bridgeway Capital Management Houston, Texas $5.69B AUM 60.64% 1-Year Est. Return

Citadel Advisors's TUSK Position: Q2 2026 in Review

Citadel Advisors increased its Mammoth Energy Services (TUSK) stake by 36% in Q2 2026, buying an estimated $353K and bringing the position to 452,163 shares worth $1.47M. The position accounts for ﹤0.01% of the portfolio, ranked #7264.

Citadel Advisors first reported a position in TUSK in Q4 2016 and has held it in 25 quarters since. The position peaked at $6.93M in Q3 2018. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

  • Citadel Advisors held 452,163 shares of Mammoth Energy Services worth $1.47M as of Q2 2026.
  • Citadel Advisors bought 120,796 Mammoth Energy Services shares in Q2 2026, an estimated $353K.
  • Mammoth Energy Services made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #7264 holding.
  • Citadel Advisors first reported a position in Mammoth Energy Services in Q4 2016 and has held it in 25 quarters since.
  • Citadel Advisors's Mammoth Energy Services position peaked at $6.93M in Q3 2018.
  • 94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.