Deerfield Management’s Merck MRK Stock Holding History

Deerfield Management’s Portfolio MRK Stock Details MRK Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-1,030,000	Closed	-$86.4M	–	166
2025 Q3	$86.4M	Buy	1,030,000 +172,276	+20%	+$14.2M	1.32%	22
2025 Q2	$67.9M	Buy	+857,724	New	+$68.2M	1.23%	22
2024 Q4	–	Sell	-8,482	Closed	-$963K	–	301
2024 Q3	$963K	Buy	+8,482	New	+$1.01M	0.01%	145
2024 Q1	–	Sell	-2,960	Closed	-$323K	–	411
2023 Q4	$323K	Buy	+2,960	New	+$307K	0.01%	110
2014 Q2	–	Sell	-500,106	Closed	-$27.1M	–	140
2014 Q1	$27.1M	Sell	500,106 -259,694	-34%	-$13.4M	1.11%	32
2013 Q4	$36.3M	Buy	759,800 +262,000	+53%	+$12M	1.88%	15
2013 Q3	$22.6M	Sell	497,800 -104,800	-17%	-$4.78M	1.05%	40
2013 Q2	$26.7M	Buy	+602,600	New	+$26.9M	1.26%	32

Other funds holding MRK

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

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

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

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

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

Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

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

Norges Bank Oslo, Norway $1T AUM

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

Deerfield Management's MRK Position: Q4 2025 in Review

Deerfield Management sold out of Merck (MRK) in Q4 2025, closing a stake of 1,030,000 shares — an estimated $86.4M sold.

Deerfield Management first reported a position in MRK in Q2 2013 and held it in 8 quarters. The position peaked at $86.4M in Q3 2025. 3,660 funds tracked by Wall St. Rank hold MRK as of Q4 2025.

Deerfield Management reported no remaining Merck position as of Q4 2025 after selling out during the quarter.
Deerfield Management sold 1,030,000 Merck shares in Q4 2025, an estimated $86.4M.
Deerfield Management first reported a position in Merck in Q2 2013 and held it in 8 quarters.
Deerfield Management's Merck position peaked at $86.4M in Q3 2025.
3,660 funds tracked by Wall St. Rank held Merck as of Q4 2025.

Based on Deerfield Management's 13F filing for Q4 2025, filed 17 Feb 2026.