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Monashee Investment Management’s T-Mobile US TMUS Stock Holding History

Monashee Investment Management’s Portfolio TMUS Stock Details TMUS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-25,000
Closed -$5.96M – 86
2025
Q2 		$5.96M Buy
+25,000
New +$6.1M 2.16% 15
2020
Q3 		– Sell
-310,000
Closed -$32.3M – 253
2020
Q2 		$32.3M Buy
+310,000
New +$29.7M 4.83% 2

Other funds holding TMUS

SoftBank Group
SoftBank Group Tokyo, Japan $18.2B AUM 177.65% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Monashee Investment Management's TMUS Position: Q3 2025 in Review

Monashee Investment Management sold out of T-Mobile US (TMUS) in Q3 2025, closing a stake of 25,000 shares — an estimated $5.96M sold.

Monashee Investment Management first reported a position in TMUS in Q2 2020 and held it in 2 quarters. The position peaked at $32.3M in Q2 2020. 1,723 funds tracked by Wall St. Rank hold TMUS as of Q3 2025.

  • Monashee Investment Management reported no remaining T-Mobile US position as of Q3 2025 after selling out during the quarter.
  • Monashee Investment Management sold 25,000 T-Mobile US shares in Q3 2025, an estimated $5.96M.
  • Monashee Investment Management first reported a position in T-Mobile US in Q2 2020 and held it in 2 quarters.
  • Monashee Investment Management's T-Mobile US position peaked at $32.3M in Q2 2020.
  • 1,723 funds tracked by Wall St. Rank held T-Mobile US as of Q3 2025.

Based on Monashee Investment Management's 13F filing for Q3 2025, filed 12 Nov 2025.