Merck & Co. (MRK) reported third-quarter 2026 sales of $18.085 billion, up 5% from a year earlier, while GAAP net income attributable to the company fell 12% to $5.065 billion. GAAP diluted earnings per share were $2.04, compared with $2.32 in the prior-year quarter.
KEYTRUDA and KEYTRUDA QLEX sales rose 6% to $8.601 billion, while WINREVAIR sales increased 93% to $694 million. Merck raised the midpoint of its full-year sales outlook to a range of $66.8 billion to $67.3 billion.
- Animal Health sales increased 4% to $1.676 billion.
- GAAP EPS included a $0.12 per-share one-time charge related to a global license agreement with SciBrunch.
- Merck expects full-year 2026 non-GAAP EPS of $2.77 to $2.82.
- The FDA accepted Merck's biologics license application for sac-TMT in certain endometrial cancer patients, with a PDUFA date of June 15, 2027.
$MRK Insider Trading Activity
$MRK insiders have traded $MRK stock on the open market 17 times in the past 6 months. Of those trades, 0 have been purchases and 17 have been sales.
Here’s a breakdown of recent trading of $MRK stock by insiders over the last 6 months:
- JENNIFER ZACHARY (EVP, General Counsel) sold 80,315 shares for an estimated $10,718,494
- DAVID MICHAEL WILLIAMS (EVP,Chief Info&Digital Officer) has made 0 purchases and 3 sales selling 52,847 shares for an estimated $6,805,145.
- RICHARD R. DELUCA (EVP&Pres, Merck Animal Heallth) has made 0 purchases and 8 sales selling 51,370 shares for an estimated $6,731,142.
- CHIRFI GUINDO (EVP, Access, Policy & Comms) has made 0 purchases and 2 sales selling 25,000 shares for an estimated $3,315,000.
- DAVID R. MARALDO (EVP & Pres. MMD) has made 0 purchases and 3 sales selling 18,706 shares for an estimated $2,407,797.
To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.
$MRK Hedge Fund Activity
We have seen 1,804 institutional investors add shares of $MRK stock to their portfolio, and 1,688 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- SIXTH STREET PARTNERS MANAGEMENT COMPANY, L.P. added 54,365,289 shares (+inf%) to their portfolio in Q2 2026, for an estimated $6,985,939,636
- JPMORGAN CHASE & CO added 43,886,420 shares (+inf%) to their portfolio in Q2 2026, for an estimated $5,639,404,970
- CAPITAL INTERNATIONAL INVESTORS added 14,516,428 shares (+1668.1%) to their portfolio in Q2 2026, for an estimated $1,865,360,998
- FISHER ASSET MANAGEMENT, LLC added 12,079,979 shares (+45.7%) to their portfolio in Q2 2026, for an estimated $1,552,277,301
- NORDEA INVESTMENT MANAGEMENT AB removed 5,024,243 shares (-58.9%) from their portfolio in Q2 2026, for an estimated $645,615,225
- CHARLES SCHWAB INVESTMENT MANAGEMENT INC added 4,600,064 shares (+9.2%) to their portfolio in Q2 2026, for an estimated $591,108,224
- PRICE T ROWE ASSOCIATES INC /MD/ removed 4,524,046 shares (-19.6%) from their portfolio in Q2 2026, for an estimated $581,339,911
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.
$MRK Congressional Stock Trading
Members of Congress have traded $MRK stock 3 times in the past 6 months. Of those trades, 2 have been purchases and 1 have been sales.
Here’s a breakdown of recent trading of $MRK stock by members of Congress over the last 6 months:
- REPRESENTATIVE MARIA ELVIRA SALAZAR has traded it 3 times. They made 2 purchases worth up to $100,000 on 08/19 and 1 sale worth up to $15,000 on 09/24.
To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard. You can access data on congressional stock trades through the Quiver Quantitative API Congress trades endpoint.
