Thomas Russo - Gardner Russo & Quinn
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    86
Portfolio value:    $8,496,278,296
Holdings Activity Buys Sells    History
Holding/activity history for  Merck & Co Inc (MRKC)
← All MRKC superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2009   Q4 0 0.00 Sell 100.00% 0.01 SEC
2009   Q3 7,086 0.01 Reduce 6.59% <0.01 $31.61 $224,000 SEC
2009   Q2 7,586 0.01 $27.95 $212,000 SEC
2009   Q1 7,586 0.02 $26.76 $203,000 SEC
2008   Q4 7,586 0.01 $30.45 $231,000 SEC
2008   Q3 7,586 <0.01 $31.51 $239,000 SEC
2008   Q2 7,586 0.03 Reduce 14.48% <0.01 $37.70 $286,000 SEC
2008   Q1 8,870 <0.01 Reduce 14.38% <0.01 $37.99 $337,000 SEC
2007   Q4 10,360 0.01 Reduce 0.72% <0.01 $58.11 $602,000 SEC
2007   Q3 10,435 0.01 Reduce 22.76% <0.01 $51.65 $539,000 SEC
2007   Q2 13,510 0.01 Reduce 21.24% <0.01 $49.81 $673,000 SEC
2007   Q1 17,153 0.02 Reduce 4.72% <0.01 $44.19 $758,000 SEC
2006   Q4 18,003 0.02 Reduce 5.26% <0.01 $43.60 $785,000 SEC
2006   Q3 19,003 0.02 Reduce 5.90% <0.01 $41.89 $796,000 SEC
2006   Q2 20,195 0.02 Reduce 3.35% <0.01 $36.44 $736,000 SEC
2006   Q1 20,895 0.03 Add 0.52% <0.01 $35.22 $736,000 SEC
2005   Q4 20,786 0.02 Reduce 20.62% <0.01 $31.80 $661,000 SEC
2005   Q3 26,186 <0.01 Reduce 3.14% <0.01 $27.23 $713,000 SEC
2005   Q2 27,036 0.03 Reduce 24.98% 0.01 $30.80 $832,709 SEC
2005   Q1 36,040 0.05 Reduce 31.99% 0.03 $32.37 $1,166,615 SEC
2004   Q4 52,990 0.08 Reduce 8.77% <0.01 $32.14 $1,703,099 SEC
2004   Q3 58,081 0.11 Reduce 7.03% 0.01 $33.00 $1,916,673 SEC
2004   Q2 62,476 0.18 Add 3.87% <0.01 $47.50 $2,967,610 SEC
2004   Q1 60,151 0.17 $44.19 $2,658,073 SEC
2003   Q4 60,151 0.16 Add 525.86% 0.13 $46.20 $2,778,976 SEC
2003   Q3 9,611 0.03 Reduce 33.59% 0.02 $50.62 $486,509 SEC
2003   Q2 14,472 0.07 Reduce 2.20% <0.01 $60.55 $876,280 SEC
2003   Q1 14,797 0.08 Reduce 3.90% <0.01 $54.78 $810,580 SEC
2002   Q4 15,397 0.11 Reduce 29.61% 0.03 $56.61 $871,624 SEC
2002   Q3 21,873 0.11 Add 1.93% <0.01 $45.71 $999,815 SEC
2002   Q2 21,459 0.11 Add 5.66% <0.01 $50.64 $1,086,684 SEC
2002   Q1 20,309 0.11 Add 3.57% <0.01 $57.58 $1,169,392 SEC
2001   Q4 19,609 0.16 Add 8.67% 0.01 $58.80 $1,153,009 SEC
2001   Q3 18,044 0.19 Reduce 2.70% <0.01 $66.60 $1,201,730 SEC
2001   Q2 18,544 0.14 Reduce 1.59% <0.01 $63.91 $1,185,147 SEC
2001   Q1 18,844 0.14 Reduce 3.03% <0.01 $75.90 $1,430,260 SEC
2000   Q4 19,433 0.25 Reduce 6.07% <0.01 $93.63 $1,819,415 SEC
2000   Q3 20,688 0.15 $74.44 $1,539,963 SEC
2000   Q2 20,688 0.14 Add 3.76% <0.01 $76,625.00 $1,585,218,000 SEC
2000   Q1 19,938 0.12 Reduce 3.39% <0.01 $62.12 $1,238,648 SEC
1999   Q4 20,638 0.15 Reduce 19.72% 0.03 $67,187.52 $1,386,616,000 SEC
1999   Q3 25,706 0.17 Add 0.93% <0.01 $64,812.50 $1,666,070,000 SEC
1999   Q2 25,470 0.16 Reduce 68.61% 0.41 $73.63 $1,875,229 SEC
1999   Q1 81,144 0.59 $80.13 $6,502,000 SEC