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Israel Englander’s Mammoth Energy Services TUSK Stock Holding History

Israel Englander’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 		$404K Buy
+124,186
New +$363K ﹤0.01% 4931
2025
Q3 		– Sell
-21,851
Closed -$61.2K – 6484
2025
Q2 		$61.2K Sell
21,851
-36,823
-63% -$94.2K ﹤0.01% 5585
2025
Q1 		$120K Buy
+58,674
New +$156K ﹤0.01% 5409
2023
Q2 		– Sell
-404,967
Closed -$1.71M – 6699
2023
Q1 		$1.71M Buy
404,967
+61,061
+18% +$364K ﹤0.01% 3590
2022
Q4 		$2.98M Sell
343,906
-558,582
-62% -$3.18M ﹤0.01% 3221
2022
Q3 		$3.08M Buy
902,488
+143,873
+19% +$502K ﹤0.01% 3364
2022
Q2 		$1.67M Sell
758,615
-607,388
-44% -$1.36M ﹤0.01% 3889
2022
Q1 		$2.91M Buy
1,366,003
+1,277,094
+1,436% +$2.32M ﹤0.01% 3525
2021
Q4 		$162K Buy
88,909
+44,213
+99% +$115K ﹤0.01% 6040
2021
Q3 		$130K Sell
44,696
-39,640
-47% -$141K ﹤0.01% 6313
2021
Q2 		$387K Sell
84,336
-148,783
-64% -$613K ﹤0.01% 5512
2021
Q1 		$1.24M Sell
233,119
-38,290
-14% -$194K ﹤0.01% 4006
2020
Q4 		$1.21M Sell
271,409
-58,008
-18% -$141K ﹤0.01% 3607
2020
Q3 		$527 Buy
329,417
+272,612
+480% +$402K ﹤0.01% 3553
2020
Q2 		$67K Buy
+56,805
New +$65.9K ﹤0.01% 4025
2020
Q1 		– Sell
-50,312
Closed -$111K – 4504
2019
Q4 		$111K Buy
+50,312
New +$90.2K ﹤0.01% 4014
2019
Q1 		– Sell
-140,697
Closed -$2.53M – 4343
2018
Q4 		$2.53M Sell
140,697
-312,262
-69% -$7.67M ﹤0.01% 2048
2018
Q3 		$13.2M Sell
452,959
-169,079
-27% -$5.57M 0.02% 1105
2018
Q2 		$21.1M Buy
622,038
+68,786
+12% +$2.42M 0.03% 819
2018
Q1 		$17.7M Buy
553,252
+404,318
+271% +$10.1M 0.02% 948
2017
Q4 		$2.92M Buy
+148,934
New +$2.71M ﹤0.01% 2042
2017
Q3 		– Sell
-23,401
Closed -$435K – 3869
2017
Q2 		$435K Sell
23,401
-145,074
-86% -$2.71M ﹤0.01% 2872
2017
Q1 		$3.62M Buy
168,475
+4,601
+3% +$87.8K 0.01% 1650
2016
Q4 		$2.49M Buy
+163,874
New +$2.42M 0.01% 1756

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
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 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

Israel Englander's TUSK Position: Q2 2026 in Review

Israel Englander opened a new position in Mammoth Energy Services (TUSK) in Q2 2026: 124,186 shares worth $404K. The stake represents ﹤0.01% of the portfolio and ranks #4931 among its holdings. This is a return to the name: Israel Englander previously reported a position in TUSK as recently as Q2 2025.

Israel Englander first reported a position in TUSK in Q4 2016 and has held it in 24 quarters since. The position peaked at $21.1M in Q2 2018. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

  • Israel Englander held 124,186 shares of Mammoth Energy Services worth $404K as of Q2 2026.
  • Mammoth Energy Services was a new Israel Englander position in Q2 2026.
  • Mammoth Energy Services made up ﹤0.01% of Israel Englander's portfolio in Q2 2026, its #4931 holding.
  • Israel Englander first reported a position in Mammoth Energy Services in Q4 2016 and has held it in 24 quarters since.
  • Israel Englander's Mammoth Energy Services position peaked at $21.1M in Q2 2018.
  • 94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.