Avidity Partners Management’s Boston Scientific BSX Stock Holding History

Avidity Partners 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 Q2	$3.41M	Sell	80,000 -40,000	-33%	-$2.17M	0.55%	24
2026 Q1	$7.22M	Buy	120,000 +5,500	+5%	+$440K	0.77%	17
2025 Q4	$10.9M	Sell	114,500 -49,800	-30%	-$4.88M	3.15%	6
2025 Q3	$16M	Sell	164,300 -157,500	-49%	-$16.3M	3.65%	4
2025 Q2	$34.6M	Sell	321,800 -14,200	-4%	-$1.44M	6.89%	2
2025 Q1	$33.9M	Sell	336,000 -179,000	-35%	-$18M	6.46%	1
2024 Q4	$46M	Sell	515,000 -447,000	-46%	-$39.3M	4.52%	2
2024 Q3	$80.6M	Sell	962,000 -208,100	-18%	-$16.4M	4.11%	1
2024 Q2	$90.1M	Sell	1,170,100 -785,900	-40%	-$57.5M	3.83%	2
2024 Q1	$134M	Buy	1,956,000 +66,000	+3%	+$4.24M	4.32%	3
2023 Q4	$109M	Sell	1,890,000 -175,800	-9%	-$9.38M	3.98%	2
2023 Q3	$109M	Buy	2,065,800 +1,280,100	+163%	+$67.1M	4.39%	1
2023 Q2	$42.5M	Sell	785,700 -64,300	-8%	-$3.36M	1.48%	27
2023 Q1	$42.5M	Sell	850,000 -2,406,700	-74%	-$113M	1.41%	28
2022 Q4	$151M	Buy	3,256,700 +718,100	+28%	+$31.1M	3.26%	8
2022 Q3	$98.3M	Buy	2,538,600 +13,600	+0.5%	+$546K	2%	16
2022 Q2	$94.1M	Buy	2,525,000 +1,328,900	+111%	+$54.1M	2.16%	21
2022 Q1	$53M	Buy	+1,196,100	New	+$51.8M	1.1%	30
2020 Q4	–	Sell	-967,100	Closed	-$37M	–	105
2020 Q3	$37M	Buy	+967,100	New	+$37.3M	1.71%	19

Other funds holding BSX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Avidity Partners Management's BSX Position: Q2 2026 in Review

Avidity Partners Management reduced its Boston Scientific (BSX) stake by 33% in Q2 2026, selling an estimated $2.17M and leaving 80,000 shares worth $3.41M. The position accounts for 0.55% of the portfolio, ranked #24.

Avidity Partners Management first reported a position in BSX in Q3 2020 and has held it in 19 quarters since. The position peaked at $151M in Q4 2022. 1,468 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

Avidity Partners Management held 80,000 shares of Boston Scientific worth $3.41M as of Q2 2026.
Avidity Partners Management sold 40,000 Boston Scientific shares in Q2 2026, an estimated $2.17M.
Boston Scientific made up 0.55% of Avidity Partners Management's portfolio in Q2 2026, its #24 holding.
Avidity Partners Management first reported a position in Boston Scientific in Q3 2020 and has held it in 19 quarters since.
Avidity Partners Management's Boston Scientific position peaked at $151M in Q4 2022.
1,468 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

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