Deerfield Management’s Boston Scientific BSX Stock Holding History

Deerfield 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	$56.1M	Buy	+1,315,000	New	+$71.4M	0.59%	46
2026 Q1	–	Sell	-24,941	Closed	-$2.38M	–	98
2025 Q4	$2.38M	Sell	24,941 -6,371	-20%	-$625K	0.03%	88
2025 Q3	$3.06M	Buy	+31,312	New	+$3.24M	0.05%	86
2021 Q2	–	Sell	-2,857,000	Closed	-$110M	–	147
2021 Q1	$110M	Buy	+2,857,000	New	+$108M	2.32%	8
2020 Q4	–	Hold	0	–	–	–	86
2015 Q3	–	Sell	-1,405,348	Closed	-$24.9M	–	137
2015 Q2	$24.9M	Buy	+1,405,348	New	+$25.1M	0.83%	44

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

Deerfield Management's BSX Position: Q2 2026 in Review

Deerfield Management opened a new position in Boston Scientific (BSX) in Q2 2026: 1,315,000 shares worth $56.1M. The stake represents 0.59% of the portfolio and ranks #46 among its holdings. This is a return to the name: Deerfield Management previously reported a position in BSX as recently as Q4 2025.

Deerfield Management first reported a position in BSX in Q2 2015 and has held it in 5 quarters since. The position peaked at $110M in Q1 2021. 1,476 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

Deerfield Management held 1,315,000 shares of Boston Scientific worth $56.1M as of Q2 2026.
Boston Scientific was a new Deerfield Management position in Q2 2026.
Boston Scientific made up 0.59% of Deerfield Management's portfolio in Q2 2026, its #46 holding.
Deerfield Management first reported a position in Boston Scientific in Q2 2015 and has held it in 5 quarters since.
Deerfield Management's Boston Scientific position peaked at $110M in Q1 2021.
1,476 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

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