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Sirios Capital Management’s Boston Scientific BSX Stock Holding History

Sirios Capital Management’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
Q1 		$16.2M Buy
257,907
+171,706
+199% +$13.7M 1.96% 16
2025
Q4 		$8.22M Sell
86,201
-1,220
-1% -$120K 1.02% 33
2025
Q3 		$8.53M Sell
87,421
-2,493
-3% -$258K 1.11% 30
2025
Q2 		$9.66M Sell
89,914
-23,746
-21% -$2.4M 1.4% 24
2025
Q1 		$11.5M Sell
113,660
-70,156
-38% -$7.06M 2.05% 20
2024
Q4 		$16.4M Sell
183,816
-5,543
-3% -$488K 2.95% 11
2024
Q3 		$15.9M Sell
189,359
-65,939
-26% -$5.2M 2.81% 12
2024
Q2 		$19.7M Sell
255,298
-4,887
-2% -$358K 3.42% 9
2024
Q1 		$17.8M Sell
260,185
-166,081
-39% -$10.7M 3.36% 10
2023
Q4 		$24.6M Sell
426,266
-66,360
-13% -$3.54M 5.03% 3
2023
Q3 		$26M Buy
492,626
+60,472
+14% +$3.17M 4.93% 4
2023
Q2 		$23.4M Sell
432,154
-25,669
-6% -$1.34M 4.04% 6
2023
Q1 		$22.9M Sell
457,823
-96,589
-17% -$4.55M 4.04% 4
2022
Q4 		$25.7M Buy
554,412
+10,721
+2% +$464K 4.73% 5
2022
Q3 		$21.1M Sell
543,691
-50,972
-9% -$2.04M 3.9% 9
2022
Q2 		$22.2M Buy
594,663
+268,070
+82% +$10.9M 4% 5
2022
Q1 		$14.5M Sell
326,593
-21,198
-6% -$919K 1.93% 20
2021
Q4 		$14.8M Sell
347,791
-107,539
-24% -$4.52M 1.69% 21
2021
Q3 		$19.8M Sell
455,330
-41,122
-8% -$1.82M 2.07% 18
2021
Q2 		$21.2M Sell
496,452
-218,402
-31% -$9.19M 1.85% 18
2021
Q1 		$27.6M Sell
714,854
-346,943
-33% -$13.1M 2.33% 11
2020
Q4 		$38.2M Buy
1,061,797
+339,571
+47% +$12.2M 2.97% 8
2020
Q3 		$27.6M Buy
722,226
+177,743
+33% +$6.85M 2.25% 16
2020
Q2 		$19.1M Sell
544,483
-376,633
-41% -$13.6M 1.56% 25
2020
Q1 		$30.1M Sell
921,116
-160,898
-15% -$6.29M 2.66% 12
2019
Q4 		$48.9M Buy
1,082,014
+2,549
+0.2% +$107K 3.15% 14
2019
Q3 		$43.9M Sell
1,079,465
-18,970
-2% -$804K 2.89% 14
2019
Q2 		$47.2M Sell
1,098,435
-507,478
-32% -$19.5M 3.04% 12
2019
Q1 		$61.6M Buy
1,605,913
+304,009
+23% +$11.6M 3.74% 10
2018
Q4 		$46M Sell
1,301,904
-1,008,345
-44% -$36.6M 2.78% 14
2018
Q3 		$88.9M Sell
2,310,249
-84,605
-4% -$2.95M 4.58% 6
2018
Q2 		$78.3M Sell
2,394,854
-526,049
-18% -$15.9M 4.07% 6
2018
Q1 		$79.8M Buy
2,920,903
+291,697
+11% +$7.93M 3.93% 7
2017
Q4 		$65.2M Buy
2,629,206
+732,944
+39% +$20.2M 3.23% 8
2017
Q3 		$55.3M Buy
1,896,262
+1,495,821
+374% +$41.3M 2.9% 12
2017
Q2 		$11.1M Sell
400,441
-17,822
-4% -$473K 0.55% 42
2017
Q1 		$10.4M Buy
+418,263
New +$10.2M 0.47% 39

Other funds holding BSX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Sirios Capital Management's BSX Position: Q1 2026 in Review

Sirios Capital Management increased its Boston Scientific (BSX) stake by 199% in Q1 2026, buying an estimated $13.7M and bringing the position to 257,907 shares worth $16.2M. The position accounts for 1.96% of the portfolio, ranked #16.

Sirios Capital Management first reported a position in BSX in Q1 2017 and has held it in 37 quarters since. The position peaked at $88.9M in Q3 2018. 1,666 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Sirios Capital Management held 257,907 shares of Boston Scientific worth $16.2M as of Q1 2026.
  • Sirios Capital Management bought 171,706 Boston Scientific shares in Q1 2026, an estimated $13.7M.
  • Boston Scientific made up 1.96% of Sirios Capital Management's portfolio in Q1 2026, its #16 holding.
  • Sirios Capital Management first reported a position in Boston Scientific in Q1 2017 and has held it in 37 quarters since.
  • Sirios Capital Management's Boston Scientific position peaked at $88.9M in Q3 2018.
  • 1,666 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

Based on Sirios Capital Management's 13F filing for Q1 2026, filed 15 May 2026.