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Livermore
Livermore
ZHEN

Gagnon Securities LLC

SEC CIK
0001125725
Latest filing
Aug 4, 2026

MRK holding history

Merck & Co., Inc. in every 13F filed by Gagnon Securities LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MRK overviewAll 13F holders of MRKFull Q2 2026 holdings

Shares (Q2 2026)
3,187
Value
$409.5K
% of portfolio
0.1%
Quarters held
22
Since Q1 2021
Holdings of MRK by Gagnon Securities LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 20263,187$409.5K0.1%−5−0.2%ReducedHolders
Q1 20263,192$384.0K0.1%−675−17.5%ReducedHolders
Q4 20253,867$407.0K0.1%−171−4.2%ReducedHolders
Q3 20254,038$338.9K0.1%−20.0%ReducedHolders
Q2 20254,040$319.8K0.1%00.0%UnchangedHolders
Q1 20254,040$362.6K0.1%−33−0.8%ReducedHolders
Q4 20244,073$405.2K0.1%−236−5.5%ReducedHolders
Q3 20244,309$489.3K0.1%−173−3.9%ReducedHolders
Q2 20244,482$554.9K0.1%−686−13.3%ReducedHolders
Q1 20245,168$681.9K0.2%+1,767+52.0%AddedHolders
Q4 20233,401$370.8K0.1%−422−11.0%ReducedHolders
Q3 20233,823$393.6K0.1%−16−0.4%ReducedHolders
Q2 20233,839$443.0K0.1%−5−0.1%ReducedHolders
Q1 20233,844$409.0K0.1%+34+0.9%AddedHolders
Q4 20223,810$422.7K0.1%−1,053−21.7%ReducedHolders
Q3 20224,863$419.0K0.1%−88−1.8%ReducedHolders
Q2 20224,951$451.0K0.1%+90+1.9%AddedHolders
Q1 20224,861$399.0K0.1%+298+6.5%AddedHolders
Q4 20214,563$350.0K0.1%00.0%UnchangedHolders
Q3 20214,563$343.0K0.1%−40−0.9%ReducedHolders
Q2 20214,603$358.0K0.1%−4−0.1%ReducedHolders
Q1 20214,607$355.0K0.1%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.