Iron Triangle Partners’s Boston Scientific BSX Stock Holding History

Iron Triangle Partners’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
2025 Q4	$40.1M	Buy	+420,773	New	+$41.3M	4.59%	6
2025 Q2	–	Sell	-332,167	Closed	-$33.5M	–	30
2025 Q1	$33.5M	Sell	332,167 -162,842	-33%	-$16.4M	5.28%	5
2024 Q4	$44.2M	Buy	+495,009	New	+$43.6M	4.87%	7
2023 Q4	–	Sell	-400,000	Closed	-$21.1M	–	28
2023 Q3	$21.1M	Sell	400,000 -450,000	-53%	-$23.6M	3.09%	16
2023 Q2	$46M	Buy	+850,000	New	+$44.4M	6.15%	5
2023 Q1	–	Sell	-600,000	Closed	-$27.8M	–	29
2022 Q4	$27.8M	Sell	600,000 -100,000	-14%	-$4.33M	4.98%	9
2022 Q3	$27.1M	Sell	700,000 -300,000	-30%	-$12M	4.74%	7
2022 Q2	$37.3M	Buy	+1,000,000	New	+$40.7M	4.83%	6
2021 Q4	–	Sell	-500,000	Closed	-$21.7M	–	27
2021 Q3	$21.7M	Buy	+500,000	New	+$22.1M	3.11%	14
2020 Q4	–	Sell	-600,000	Closed	-$22.9M	–	29
2020 Q3	$22.9M	Hold	600,000	–	–	5.12%	7
2020 Q2	$21.1M	Hold	600,000	–	–	5.31%	6
2020 Q1	$19.6M	Sell	600,000 -139,842	-19%	-$5.46M	7.57%	2
2019 Q4	$33.5M	Buy	+739,842	New	+$31M	8.87%	1

Other funds holding BSX

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Norges Bank Oslo, Norway $935B AUM

Iron Triangle Partners's BSX Position: Q4 2025 in Review

Iron Triangle Partners opened a new position in Boston Scientific (BSX) in Q4 2025: 420,773 shares worth $40.1M. The stake represents 4.59% of the portfolio and ranks #6 among its holdings. This is a return to the name: Iron Triangle Partners previously reported a position in BSX as recently as Q1 2025.

Iron Triangle Partners first reported a position in BSX in Q4 2019 and has held it in 13 quarters since. The position peaked at $46M in Q2 2023. 1,783 funds tracked by Wall St. Rank hold BSX as of Q4 2025.

Iron Triangle Partners held 420,773 shares of Boston Scientific worth $40.1M as of Q4 2025.
Boston Scientific was a new Iron Triangle Partners position in Q4 2025.
Boston Scientific made up 4.59% of Iron Triangle Partners's portfolio in Q4 2025, its #6 holding.
Iron Triangle Partners first reported a position in Boston Scientific in Q4 2019 and has held it in 13 quarters since.
Iron Triangle Partners's Boston Scientific position peaked at $46M in Q2 2023.
1,783 funds tracked by Wall St. Rank held Boston Scientific as of Q4 2025.

Based on Iron Triangle Partners's 13F filing for Q4 2025, filed 17 Feb 2026.