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Aaron Cowen’s Merck MRK Stock Holding History

Aaron Cowen’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
-219,178
Closed -$18.4M – 100
2025
Q3 		$18.4M Hold
219,178
– – 0.47% 57
2025
Q2 		$17.4M Buy
219,178
+75,078
+52% +$5.97M 0.52% 46
2025
Q1 		$12.9M Buy
144,100
+91,100
+172% +$8.51M 0.48% 52
2024
Q4 		$5.27M Buy
+53,000
New +$5.46M 0.18% 64
2024
Q1 		– Sell
-15,500
Closed -$1.69M – 109
2023
Q4 		$1.69M Buy
+15,500
New +$1.61M 0.08% 68
2018
Q4 		– Sell
-3,953,601
Closed -$268M – 32
2018
Q3 		$268M Buy
3,953,601
+1,872,140
+90% +$119M 6.16% 7
2018
Q2 		$121M Buy
+2,081,461
New +$117M 3.2% 15
2016
Q4 		– Sell
-1,766,299
Closed -$105M – 58
2016
Q3 		$105M Buy
+1,766,299
New +$103M 3.38% 10

Other funds holding MRK

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Aaron Cowen's MRK Position: Q4 2025 in Review

Aaron Cowen sold out of Merck (MRK) in Q4 2025, closing a stake of 219,178 shares — an estimated $18.4M sold.

Aaron Cowen first reported a position in MRK in Q3 2016 and held it in 8 quarters. The position peaked at $268M in Q3 2018. 3,660 funds tracked by Wall St. Rank hold MRK as of Q4 2025.

  • Aaron Cowen reported no remaining Merck position as of Q4 2025 after selling out during the quarter.
  • Aaron Cowen sold 219,178 Merck shares in Q4 2025, an estimated $18.4M.
  • Aaron Cowen first reported a position in Merck in Q3 2016 and held it in 8 quarters.
  • Aaron Cowen's Merck position peaked at $268M in Q3 2018.
  • 3,660 funds tracked by Wall St. Rank held Merck as of Q4 2025.

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