Boston Partners
TMUS icon

Boston Partners’s T-Mobile US TMUS Stock Holding History

Boston 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
Q2 		$395M Sell
2,343,384
-59,166
-2% -$11.2M 0.35% 92
2026
Q1 		$504M Buy
2,402,550
+72,594
+3% +$14.9M 0.53% 61
2025
Q4 		$472M Buy
2,329,956
+211,332
+10% +$44.8M 0.49% 69
2025
Q3 		$506M Buy
2,118,624
+579,352
+38% +$140M 0.52% 60
2025
Q2 		$367M Buy
1,539,272
+151,317
+11% +$36.9M 0.41% 79
2025
Q1 		$370M Sell
1,387,955
-161,218
-10% -$39.7M 0.45% 72
2024
Q4 		$342M Sell
1,549,173
-298,247
-16% -$67.8M 0.42% 81
2024
Q3 		$383M Sell
1,847,420
-17,061
-0.9% -$3.27M 0.45% 81
2024
Q2 		$329M Sell
1,864,481
-732,859
-28% -$123M 0.41% 86
2024
Q1 		$424M Buy
2,597,340
+28,045
+1% +$4.56M 0.51% 66
2023
Q4 		$412M Sell
2,569,295
-169,799
-6% -$25.1M 0.55% 56
2023
Q3 		$384M Buy
2,739,094
+647,234
+31% +$89.7M 0.53% 64
2023
Q2 		$290M Sell
2,091,860
-479,207
-19% -$67.3M 0.39% 90
2023
Q1 		$372M Sell
2,571,067
-836,194
-25% -$121M 0.51% 67
2022
Q4 		$479M Sell
3,407,261
-79,466
-2% -$11.4M 0.65% 47
2022
Q3 		$470M Sell
3,486,727
-308,047
-8% -$43.3M 0.69% 42
2022
Q2 		$512M Buy
3,794,774
+721,764
+23% +$94.2M 0.72% 43
2022
Q1 		$395M Buy
3,073,010
+1,209,516
+65% +$144M 0.48% 69
2021
Q4 		$216M Buy
1,863,494
+157,350
+9% +$18.5M 0.26% 134
2021
Q3 		$218M Sell
1,706,144
-936,673
-35% -$130M 0.28% 125
2021
Q2 		$383M Sell
2,642,817
-1,848,965
-41% -$255M 0.49% 63
2021
Q1 		$563M Buy
4,491,782
+919,898
+26% +$116M 0.76% 34
2020
Q4 		$482M Sell
3,571,884
-151,399
-4% -$18.7M 0.75% 37
2020
Q3 		$426M Buy
3,723,283
+756,538
+26% +$83.9M 0.78% 37
2020
Q2 		$309M Buy
+2,966,745
New +$284M 0.57% 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
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
SoftBank Group
SoftBank Group Tokyo, Japan $18.2B AUM 177.65% 1-Year Est. Return

Boston Partners's TMUS Position: Q2 2026 in Review

Boston Partners reduced its T-Mobile US (TMUS) stake by 2.5% in Q2 2026, selling an estimated $11.2M and leaving 2,343,384 shares worth $395M. The position accounts for 0.35% of the portfolio, ranked #92.

Boston Partners first reported a position in TMUS in Q2 2020 and has held it in 25 quarters since. The position peaked at $563M in Q1 2021. 1,657 funds tracked by Wall St. Rank hold TMUS as of Q2 2026.

  • Boston Partners held 2,343,384 shares of T-Mobile US worth $395M as of Q2 2026.
  • Boston Partners sold 59,166 T-Mobile US shares in Q2 2026, an estimated $11.2M.
  • T-Mobile US made up 0.35% of Boston Partners's portfolio in Q2 2026, its #92 holding.
  • Boston Partners first reported a position in T-Mobile US in Q2 2020 and has held it in 25 quarters since.
  • Boston Partners's T-Mobile US position peaked at $563M in Q1 2021.
  • 1,657 funds tracked by Wall St. Rank held T-Mobile US as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.