Vanguard Portfolio Management
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Vanguard Portfolio Management’s Mammoth Energy Services TUSK Stock Holding History

Vanguard Portfolio Management’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 		– Sell
-140,145
Closed -$343K – 3251
2026
Q1 		$343K Buy
+140,145
New +$319K ﹤0.01% 2997

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

Vanguard Portfolio Management's TUSK Position: Q2 2026 in Review

Vanguard Portfolio Management sold out of Mammoth Energy Services (TUSK) in Q2 2026, closing a stake of 140,145 shares — an estimated $343K sold.

Vanguard Portfolio Management first reported a position in TUSK in Q1 2026 and held it in 1 quarter. The position peaked at $343K in Q1 2026. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

  • Vanguard Portfolio Management reported no remaining Mammoth Energy Services position as of Q2 2026 after selling out during the quarter.
  • Vanguard Portfolio Management sold 140,145 Mammoth Energy Services shares in Q2 2026, an estimated $343K.
  • Vanguard Portfolio Management first reported a position in Mammoth Energy Services in Q1 2026 and held it in 1 quarter.
  • Vanguard Portfolio Management's Mammoth Energy Services position peaked at $343K in Q1 2026.
  • 94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.