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O'Brien Greene & Co’s Merck MRK Stock Holding History

O'Brien Greene & Co’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
Q1 		$545K Sell
4,530
-138
-3% -$15.9K 0.15% 86
2025
Q4 		$491K Buy
4,668
+186
+4% +$17.5K 0.15% 89
2025
Q3 		$376K Sell
4,482
-179
-4% -$14.7K 0.12% 102
2025
Q2 		$369K Hold
4,661
– – 0.12% 98
2025
Q1 		$418K Hold
4,661
– – 0.14% 86
2024
Q4 		$464K Sell
4,661
-334
-7% -$34.4K 0.15% 85
2024
Q3 		$567K Sell
4,995
-389
-7% -$46.2K 0.18% 80
2024
Q2 		$667K Buy
5,384
+389
+8% +$50.1K 0.21% 73
2024
Q1 		$659K Hold
4,995
– – 0.22% 76
2023
Q4 		$545K Sell
4,995
-100
-2% -$10.4K 0.19% 79
2023
Q3 		$525K Hold
5,095
– – 0.19% 78
2023
Q2 		$588K Hold
5,095
– – 0.2% 73
2023
Q1 		$543K Hold
5,095
– – 0.2% 75
2022
Q4 		$566K Sell
5,095
-11,627
-70% -$1.19M 0.21% 73
2022
Q3 		$1.44M Buy
16,722
+11,148
+200% +$995K 0.19% 78
2022
Q2 		$508K Hold
5,574
– – 0.19% 79
2022
Q1 		$458K Sell
5,574
-27
-0.5% -$2.13K 0.15% 95
2021
Q4 		$429K Buy
5,601
+166
+3% +$13.2K 0.14% 99
2021
Q3 		$408K Sell
5,435
-10
-0.2% -$761 0.15% 98
2021
Q2 		$423K Sell
5,445
-261
-5% -$19.4K 0.15% 97
2021
Q1 		$420K Sell
5,706
-420
-7% -$31K 0.17% 89
2020
Q4 		$478K Sell
6,126
-157
-2% -$12K 0.2% 84
2020
Q3 		$497K Hold
6,283
– – 0.24% 73
2020
Q2 		$463K Hold
6,283
– – 0.25% 74
2020
Q1 		$461K Hold
6,283
– – 0.31% 67
2019
Q4 		$545K Hold
6,283
– – 0.28% 76
2019
Q3 		$504K Hold
6,283
– – 0.27% 76
2019
Q2 		$502K Hold
6,283
– – 0.26% 79
2019
Q1 		$499K Buy
6,283
+349
+6% +$26.1K 0.25% 81
2018
Q4 		$433K Buy
+5,934
New +$419K 0.26% 70

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

O'Brien Greene & Co's MRK Position: Q1 2026 in Review

O'Brien Greene & Co reduced its Merck (MRK) stake by 3% in Q1 2026, selling an estimated $15.9K and leaving 4,530 shares worth $545K. The position accounts for 0.15% of the portfolio, ranked #86.

O'Brien Greene & Co first reported a position in MRK in Q4 2018 and has held it in 30 quarters since. The position peaked at $1.44M in Q3 2022. 3,776 funds tracked by Wall St. Rank hold MRK as of Q1 2026.

  • O'Brien Greene & Co held 4,530 shares of Merck worth $545K as of Q1 2026.
  • O'Brien Greene & Co sold 138 Merck shares in Q1 2026, an estimated $15.9K.
  • Merck made up 0.15% of O'Brien Greene & Co's portfolio in Q1 2026, its #86 holding.
  • O'Brien Greene & Co first reported a position in Merck in Q4 2018 and has held it in 30 quarters since.
  • O'Brien Greene & Co's Merck position peaked at $1.44M in Q3 2022.
  • 3,776 funds tracked by Wall St. Rank held Merck as of Q1 2026.

Based on O'Brien Greene & Co's 13F filing for Q1 2026, filed 6 May 2026.