MRK Stock Ownership Activity

MERCK & CO INC 13F holders

4 value investing gurus have made changes to the MERCK & CO INC (MRK) position according to the gurus' latest SEC quarterly report(s). MRK has been bought (as a new position) by 1 guru(s), the number of MRK shares has been increased by 1, decreased by 2 super investor(s).

Which gurus or hedge funds are buying MRK now?

According to the latest SEC filing(s) MERCK & CO INC (MRK) has been bought by 2 gurus: Thomas Russo - Gardner Russo & Quinn (new buy) and Christopher Bloomstran - Semper Augustus Investments Group (added shares +0.43%).

To see more about who is investing in MERCK & CO INC (MRK), please go to the MRK ownership page.

History
Name
Company
%
Activity
Share
Change
% change to
Portfolio
% of
Portfolio
2026 Q1 (4 results)
Thomas Russo
Gardner Russo & Quinn
buy
+2,141
+0.00%
0.00%
Christopher Bloomstran
Semper Augustus Investments Group
+0.43%
+190
+0.00%
0.64%
Sarah Ketterer
Causeway Capital Management
-18.23%
-190,405
-0.28%
1.26%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-47.15%
-202,815
-4.33%
4.85%
Current price: $114.70 4.65% AVG reported price*: $120.29
2025 Q4 (2 results)
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-0.84%
-3,647
-0.07%
8.02%
Sarah Ketterer
Causeway Capital Management
-7.89%
-89,440
-0.13%
1.51%
Current price: $114.70 8.97% AVG reported price*: $105.26
2025 Q3 (2 results)
Sarah Ketterer
Causeway Capital Management
+15.41%
+151,397
+0.17%
1.26%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-11.56%
-56,715
-0.90%
6.85%
Current price: $114.70 36.66% AVG reported price*: $83.93
2025 Q2 (3 results)
Sarah Ketterer
Causeway Capital Management
+9.44%
+84,791
+0.11%
1.23%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-0.37%
-1,810
-0.03%
7.80%
Thomas Russo
Gardner Russo & Quinn
-100.00%
-2,763
-0.00%
0.00%
Current price: $114.70 44.90% AVG reported price*: $79.16
2025 Q1 (3 results)
Sarah Ketterer
Causeway Capital Management
+53.62%
+313,396
+0.59%
1.68%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-3.27%
-16,633
-0.30%
8.94%
Thomas Russo
Gardner Russo & Quinn
-5.57%
-163
-0.00%
0.00%
Current price: $114.70 27.78% AVG reported price*: $89.76
2024 Q4 (4 results)
Sarah Ketterer
Causeway Capital Management
buy
+584,473
+1.32%
1.32%
Thomas Russo
Gardner Russo & Quinn
-5.22%
-161
-0.00%
0.00%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-12.33%
-71,580
-1.55%
11.00%
Harry Burn
Sound Shore Management
-100.00%
-547,423
-2.05%
0.00%
Current price: $114.70 15.30% AVG reported price*: $99.48
2024 Q3 (4 results)
Harry Burn
Sound Shore Management
+3.11%
+16,528
+0.06%
0.00%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-1.93%
-11,423
-0.22%
11.35%
Thomas Russo
Gardner Russo & Quinn
-10.42%
-359
-0.00%
0.00%
Nathaniel Simons
Meritage Group
-100.00%
-2,292
-0.01%
0.00%
Current price: $114.70 1.01% AVG reported price*: $113.56
2024 Q2 (4 results)
Nathaniel Simons
Meritage Group
+7.45%
+159
+0.00%
0.00%
Thomas Russo
Gardner Russo & Quinn
-1.91%
-67
-0.00%
0.00%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-3.57%
-21,904
-0.46%
12.32%
Harry Burn
Sound Shore Management
-23.42%
-162,397
-0.67%
2.19%
Current price: $114.70 7.35% AVG reported price*: $123.80
2024 Q1 (6 results)
Christopher Bloomstran
Semper Augustus Investments Group
-0.30%
-132
-0.00%
1.07%
Harry Burn
Sound Shore Management
-1.20%
-8,431
-0.03%
2.86%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-1.72%
-10,726
-0.21%
12.01%
Thomas Russo
Gardner Russo & Quinn
-7.70%
-293
-0.00%
0.00%
Jim Cullen
Cullen Value Fund
-8.20%
-509
-0.29%
3.24%
Nathaniel Simons
Meritage Group
-25.76%
-740
-0.00%
0.01%
Current price: $114.70 13.05% AVG reported price*: $131.92
2023 Q4 (7 results)
Nathaniel Simons
Meritage Group
buy
+2,873
+0.01%
0.01%
Christopher Bloomstran
Semper Augustus Investments Group
+0.29%
+131
+0.00%
1.02%
Harry Burn
Sound Shore Management
-0.22%
-1,570
-0.01%
2.65%
Thomas Russo
Gardner Russo & Quinn
-0.94%
-36
-0.00%
0.00%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-2.23%
-14,252
-0.24%
10.73%
Jim Cullen
Cullen Value Fund
-13.89%
-1,001
-0.49%
3.05%
Bill Gates
Bill & Melinda Gates Foundation Trust
-100.00%
-17,740
-0.00%
0.00%
Current price: $114.70 5.22% AVG reported price*: $109.01
2023 Q3 (6 results)
Bill Gates
Bill & Melinda Gates Foundation Trust
buy
+17,740
+0.00%
0.00%
Thomas Graham, Alan, Irving Kahns
Kahn Brothers Group
-1.52%
-9,878
-0.16%
10.26%
Thomas Russo
Gardner Russo & Quinn
-2.98%
-118
-0.00%
0.00%
Jim Cullen
Cullen Value Fund
-5.31%
-404
-0.20%
3.56%
Harry Burn
Sound Shore Management
-6.32%
-47,452
-0.19%
2.77%
Parnassus Investments
Parnassus Endeavor Fund
-100.00%
-1,337,970
-3.40%
0.00%
Current price: $114.70 11.41% AVG reported price*: $102.95
45 of 182

Shares, change to shares, sold shares - split-adjusted.

Reported price - this doesn't represent the actual buy or sell price.
It is the split-adjusted price of the security as of the last day of the reported period.

Value or Price - If the security is completely sold out, we show the reported value (or price) prior to the actual period.