Marshall Wace’s Merck MRK Stock Holding History

Marshall Wace’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
2026 Q2	$334K	Buy	+2,600	New	+$304K	﹤0.01%	2675
2022 Q4	–	Sell	-1,500	Closed	-$130K	–	3236
2022 Q3	$130K	Buy	+1,500	New	+$134K	﹤0.01%	3153
2021 Q4	–	Sell	-17,200	Closed	-$1.29M	–	4145
2021 Q3	$1.29M	Buy	+17,200	New	+$1.31M	0.01%	1845

Other funds holding MRK

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

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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

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

Marshall Wace's MRK Position: Q2 2026 in Review

Marshall Wace sold out of Merck (MRK) in Q2 2026, closing a stake of 2,778,301 shares — an estimated $325M sold.

Marshall Wace first reported a position in MRK in Q2 2014 and held it in 41 quarters. The position peaked at $557M in Q1 2022. 3,834 funds tracked by Wall St. Rank hold MRK as of Q2 2026.

Marshall Wace reported no remaining Merck position as of Q2 2026 after selling out during the quarter.
Marshall Wace sold 2,778,301 Merck shares in Q2 2026, an estimated $325M.
Marshall Wace first reported a position in Merck in Q2 2014 and held it in 41 quarters.
Marshall Wace's Merck position peaked at $557M in Q1 2022.
3,834 funds tracked by Wall St. Rank held Merck as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.