Calamos Advisors
MRK icon

Calamos Advisors’s Merck MRK Stock Holding History

Calamos Advisors’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
2024
Q2 		– Sell
-70,000
Closed -$7.63M – 981
2024
Q1 		$7.63M Buy
+70,000
New +$8.63M 0.04% 454

Other funds holding MRK

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Calamos Advisors's MRK Position: Q1 2026 in Review

Calamos Advisors increased its Merck (MRK) stake by 8% in Q1 2026, buying an estimated $6.68M and bringing the position to 777,663 shares worth $93.5M. The position accounts for 0.33% of the portfolio, ranked #59.

Calamos Advisors first reported a position in MRK in Q2 2013 and has held it in 52 quarters since. The position peaked at $132M in Q1 2024. 3,777 funds tracked by Wall St. Rank hold MRK as of Q1 2026.

  • Calamos Advisors held 777,663 shares of Merck worth $93.5M as of Q1 2026.
  • Calamos Advisors bought 57,857 Merck shares in Q1 2026, an estimated $6.68M.
  • Merck made up 0.33% of Calamos Advisors's portfolio in Q1 2026, its #59 holding.
  • Calamos Advisors first reported a position in Merck in Q2 2013 and has held it in 52 quarters since.
  • Calamos Advisors's Merck position peaked at $132M in Q1 2024.
  • 3,777 funds tracked by Wall St. Rank held Merck as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.