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Thomas Steyer’s Boston Scientific BSX Stock Holding History

Thomas Steyer’s Portfolio BSX Stock Details BSX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$449M Buy
10,521,184
+3,050,500
+41% +$166M 2.07% 15
2026
Q1 		$469M Buy
7,470,684
+31,120
+0.4% +$2.49M 2.46% 15
2025
Q4 		$709M Buy
7,439,564
+2,693,007
+57% +$264M 3.07% 8
2025
Q3 		$463M Buy
4,746,557
+765,500
+19% +$79.3M 1.9% 16
2025
Q2 		$428M Buy
3,981,057
+218,300
+6% +$22.1M 1.8% 20
2025
Q1 		$380M Sell
3,762,757
-1,260,200
-25% -$127M 1.82% 21
2024
Q4 		$449M Sell
5,022,957
-402,700
-7% -$35.4M 1.97% 19
2024
Q3 		$455M Buy
5,425,657
+1,316,500
+32% +$104M 1.99% 16
2024
Q2 		$316M Sell
4,109,157
-487,500
-11% -$35.7M 1.36% 27
2024
Q1 		$315M Sell
4,596,657
-1,223,600
-21% -$78.7M 1.34% 22
2023
Q4 		$336M Buy
5,820,257
+781,000
+15% +$41.7M 1.54% 18
2023
Q3 		$266M Sell
5,039,257
-6,000
-0.1% -$315K 1.24% 27
2023
Q2 		$273M Sell
5,045,257
-2,660,000
-35% -$139M 1.37% 28
2023
Q1 		$385M Sell
7,705,257
-1,555,000
-17% -$73.3M 2.11% 16
2022
Q4 		$428M Sell
9,260,257
-2,891,000
-24% -$125M 2.53% 7
2022
Q3 		$471M Sell
12,151,257
-2,896,000
-19% -$116M 2.58% 6
2022
Q2 		$561M Sell
15,047,257
-693,000
-4% -$28.2M 3.04% 5
2022
Q1 		$697M Sell
15,740,257
-1,074,324
-6% -$46.6M 3.36% 4
2021
Q4 		$714M Buy
16,814,581
+2,812,000
+20% +$118M 3.57% 4
2021
Q3 		$608M Buy
14,002,581
+1,285,962
+10% +$56.9M 2.84% 4
2021
Q2 		$544M Sell
12,716,619
-106,250
-0.8% -$4.47M 2.22% 9
2021
Q1 		$496M Sell
12,822,869
-415,450
-3% -$15.7M 2.46% 9
2020
Q4 		$476M Buy
13,238,319
+4,962,400
+60% +$179M 2.86% 8
2020
Q3 		$316M Buy
+8,275,919
New +$319M 2.19% 17

Other funds holding BSX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Thomas Steyer's BSX Position: Q2 2026 in Review

Thomas Steyer increased its Boston Scientific (BSX) stake by 41% in Q2 2026, buying an estimated $166M and bringing the position to 10,521,184 shares worth $449M. The position accounts for 2.07% of the portfolio, ranked #15.

Thomas Steyer first reported a position in BSX in Q3 2020 and has held it in 24 quarters since. The position peaked at $714M in Q4 2021. 1,468 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

  • Thomas Steyer held 10,521,184 shares of Boston Scientific worth $449M as of Q2 2026.
  • Thomas Steyer bought 3,050,500 Boston Scientific shares in Q2 2026, an estimated $166M.
  • Boston Scientific made up 2.07% of Thomas Steyer's portfolio in Q2 2026, its #15 holding.
  • Thomas Steyer first reported a position in Boston Scientific in Q3 2020 and has held it in 24 quarters since.
  • Thomas Steyer's Boston Scientific position peaked at $714M in Q4 2021.
  • 1,468 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

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