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MERCK & CO INC

MRK

Holders

1

Combined Value

$1.49B

Combined Shares

12,366,933

Current Price

$119.05

52W High

$125.14

vs 52W High

−4.9%

Investor Activity Chart

Quarterly buys (▲) and sells (▼) by tracked investors. Click a marker to view that investor's portfolio; hover for details. Price line is implied from 13F filings (value ÷ shares), not market data.

$70.18$91.13$112.08$133.02Q2'24Q3'24Q4'24Q1'25Q2'25Q3'25Q4'25Q1'26Q2 2024 · implied price $123.80Q3 2024 · implied price $113.56Q4 2024 · implied price $99.48Q1 2025 · implied price $89.76Q2 2025 · implied price $79.16Q3 2025 · implied price $83.93Q4 2025 · implied price $105.26Q1 2026 · implied price $120.29George Soros - Soros Fund Management · bought 300,000 shares @ ~$123.80 · Q2 2024 (new position)Jim Simons - Renaissance Technologies · bought 4,915 shares @ ~$124.05 · Q2 2024 (new position)Harris Associates (Oakmark Funds) · bought 3,301,429 shares @ ~$99.48 · Q4 2024Jim Simons - Renaissance Technologies · bought 295,758 shares @ ~$99.48 · Q4 2024George Soros - Soros Fund Management · sold 300,000 shares @ ~$113.56 · Q4 2024 (sold out)Harris Associates (Oakmark Funds) · bought 2,943,021 shares @ ~$113.56 · Q3 2024 (new position)Jim Simons - Renaissance Technologies · bought 1,080,963 shares @ ~$113.56 · Q3 2024Harris Associates (Oakmark Funds) · bought 1,224,910 shares @ ~$89.76 · Q1 2025Jim Simons - Renaissance Technologies · sold 1,159,944 shares @ ~$89.76 · Q1 2025Harris Associates (Oakmark Funds) · bought 1,661,958 shares @ ~$79.16 · Q2 2025Jim Simons - Renaissance Technologies · sold 81,872 shares @ ~$79.16 · Q2 2025Harris Associates (Oakmark Funds) · bought 692,290 shares @ ~$83.93 · Q3 2025Jim Simons - Renaissance Technologies · sold 139,820 shares @ ~$79.16 · Q3 2025 (sold out)Harris Associates (Oakmark Funds) · bought 4,265,097 shares @ ~$105.26 · Q4 2025Harris Associates (Oakmark Funds) · sold 1,721,772 shares @ ~$120.29 · Q1 2026BUYSELLIMPLIED PRICE

Held By

Tracked investors currently holding this security, based on each investor's most recent 13F filing. Gain compares the current market price to each investor's estimated average buy price.

InvestorValue% of PortfolioAvg Buy PriceGainLast ActivityAs of
Harris Associates (Oakmark Funds)$1.49B1.98%~$100.16+18.9%SELL Q1 2026Q1 2026

Recent Activity

Latest position changes by tracked investors. Prices are estimates implied from 13F filings.

QuarterInvestorActionEst. ValueEst. Price
Q1 2026Harris Associates (Oakmark Funds)SELL−$207.11M~$120.29
Q4 2025Harris Associates (Oakmark Funds)BUY+$448.94M~$105.26
Q3 2025Harris Associates (Oakmark Funds)BUY+$58.10M~$83.93
Q3 2025Jim Simons - Renaissance TechnologiesSOLD OUT−$11.07M~$79.16
Q2 2025Harris Associates (Oakmark Funds)BUY+$131.56M~$79.16
Q2 2025Jim Simons - Renaissance TechnologiesSELL−$6.48M~$79.16
Q1 2025Harris Associates (Oakmark Funds)BUY+$109.95M~$89.76
Q1 2025Jim Simons - Renaissance TechnologiesSELL−$104.12M~$89.76
Q4 2024Harris Associates (Oakmark Funds)BUY+$328.43M~$99.48
Q4 2024George Soros - Soros Fund ManagementSOLD OUT−$34.07M~$113.56
Q4 2024Jim Simons - Renaissance TechnologiesBUY+$29.42M~$99.48
Q3 2024Harris Associates (Oakmark Funds)NEW BUY+$334.21M~$113.56
Q3 2024Jim Simons - Renaissance TechnologiesBUY+$122.75M~$113.56
Q2 2024George Soros - Soros Fund ManagementNEW BUY+$37.14M~$123.80
Q2 2024Jim Simons - Renaissance TechnologiesNEW BUY+$609.7K~$124.05

Ownership History

Aggregate position across all tracked investors per quarter (options excluded). Implied price is the reported value divided by shares held.

PeriodHoldersTotal SharesΔ SharesTotal ValueImplied Price
Q1 2026112,366,933-12.2%$1.49B$120.29
Q4 2025114,088,705+43.4%$1.48B$105.26
Q3 202519,823,608+6.0%$824.50M$83.93
Q2 202529,271,138+20.5%$733.90M$79.16
Q1 202527,691,052+0.9%$690.35M$89.76
Q4 202427,626,086+76.2%$758.64M$99.48
Q3 202434,328,899+1319.7%$491.59M$113.56
Q2 20242304,915—$37.75M$123.80