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Great Diamond Partners’s T-Mobile US TMUS Stock Holding History

Great Diamond Partners’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
2026
Q1 		– Sell
-1,997
Closed -$405K – 251
2025
Q4 		$405K Sell
1,997
-8,271
-81% -$1.75M 0.08% 169
2025
Q3 		$2.46M Buy
10,268
+252
+3% +$61K 0.48% 65
2025
Q2 		$2.39M Buy
10,016
+2,540
+34% +$620K 0.5% 57
2025
Q1 		$1.99M Buy
+7,476
New +$1.84M 0.55% 57

Other funds holding TMUS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
SoftBank Group
SoftBank Group Tokyo, Japan $18.2B AUM 177.65% 1-Year Est. Return

Great Diamond Partners's TMUS Position: Q1 2026 in Review

Great Diamond Partners sold out of T-Mobile US (TMUS) in Q1 2026, closing a stake of 1,997 shares — an estimated $405K sold.

Great Diamond Partners first reported a position in TMUS in Q1 2025 and held it in 4 quarters. The position peaked at $2.46M in Q3 2025. 1,728 funds tracked by Wall St. Rank hold TMUS as of Q1 2026.

  • Great Diamond Partners reported no remaining T-Mobile US position as of Q1 2026 after selling out during the quarter.
  • Great Diamond Partners sold 1,997 T-Mobile US shares in Q1 2026, an estimated $405K.
  • Great Diamond Partners first reported a position in T-Mobile US in Q1 2025 and held it in 4 quarters.
  • Great Diamond Partners's T-Mobile US position peaked at $2.46M in Q3 2025.
  • 1,728 funds tracked by Wall St. Rank held T-Mobile US as of Q1 2026.

Based on Great Diamond Partners's 13F filing for Q1 2026, filed 12 May 2026.