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MRK

Congressional & insider trading activity

49
Total Trades
11
Traders
22 / 27
Buys / Sells
Distributing
Congress Sentiment
Buy Volume: $705,000 Sell Volume: $1,070,000

Top Traders

David A Perdue , Jr
David A Perdue , Jr
14 buys · 10 sells
R Shelley Moore Capito
Shelley Moore Capito
1 buys · 2 sells
R
L
Larson Betty D
0 buys · 2 sells
Insider
S
Smart Dalton E. III
0 buys · 2 sells
Insider Josh Gottheimer
Josh Gottheimer
2 buys · 0 sells
D Gilbert Cisneros
Gilbert Cisneros
2 buys · 0 sells
D Kelly Loeffler
Kelly Loeffler
1 buys · 1 sells
R Patty Murray
Patty Murray
1 buys · 1 sells
D
C
Chattopadhyay Sanat
0 buys · 1 sells
Insider
L
Litchfield Caroline
0 buys · 1 sells
Insider

Recent Trades

Date Trader Type Amount Filed
2026-04-30 Larson Betty D Insider SELL - 2026-05-01
2026-04-30 Smart Dalton E. III Insider SELL - 2026-05-01
2026-04-29 Chattopadhyay Sanat Insider SELL - 2026-05-01
2026-04-29 Litchfield Caroline Insider SELL - 2026-05-01
2026-04-29 Davis Robert M Insider SELL - 2026-05-01
2026-04-29 Larson Betty D Insider SELL - 2026-05-01
2026-04-29 Oosthuizen Johannes Jacobus Insider SELL - 2026-05-01
2026-04-29 Li Dean Y Insider SELL - 2026-05-01
2026-04-29 Smart Dalton E. III Insider SELL - 2026-05-01
2026-02-04 Josh Gottheimer D BUY $1,001-15,000 2026-03-16
2026-02-04 Josh Gottheimer D BUY $1,001-15,000 2026-03-16
2025-12-19 Gilbert Cisneros D BUY $1,001-15,000 2026-01-12
2025-12-18 Julie Johnson D SELL $1,001-15,000 2026-01-15
2025-11-18 Gilbert Cisneros D BUY $1,001-15,000 2025-12-15
2020-04-16 David A Perdue , Jr R SELL $1,001-15,000 -
2020-04-14 David A Perdue , Jr R SELL $15,001-50,000 -
2020-04-07 Kelly Loeffler R BUY $15,001-50,000 -
2020-04-06 David A Perdue , Jr R SELL $1,001-15,000 -
2020-04-03 David A Perdue , Jr R SELL $15,001-50,000 -
2020-03-31 David A Perdue , Jr R SELL $15,001-50,000 -

Showing 20 of 49 trades

Top Institutional Holders SEC 13F Filings

Quarterly institutional ownership from 13F-HR filings

Institution Shares Value Report Date
Vanguard Group Inc 254,322,763 $26,770,014,033 2025-12-31
BlackRock Inc 201,836,434 $22,004,208,018 2023-12-31
State Street Corp 119,325,673 $14,453,274,004 2026-03-31
Wellington Management Group 84,314,971 $10,142,247,862 2026-03-31
Morgan Stanley 47,632,487 $5,729,712,158 2026-03-31
FMR LLC 44,516,010 $5,354,830,881 2026-03-31
JPMorgan Chase & Co 29,199,978 $3,073,589,831 2025-12-31
Invesco Ltd 21,855,101 $2,628,950,044 2026-03-31
Goldman Sachs Group Inc 20,133,379 $2,421,844,110 2026-03-31
Dimensional Fund Advisors 15,456,039 $1,858,937,753 2026-03-31

Trade-Event Timing Trades near material events

Trades within 7 days before or 3 days after 8-K filings

Larson Betty D SELL same day as Results of Operations and Financial Condition (2026-04-30)
Smart Dalton E. III SELL same day as Results of Operations and Financial Condition (2026-04-30)
Chattopadhyay Sanat SELL 1d before Results of Operations and Financial Condition (2026-04-30)
Litchfield Caroline SELL 1d before Results of Operations and Financial Condition (2026-04-30)
Davis Robert M SELL 1d before Results of Operations and Financial Condition (2026-04-30)
Oosthuizen Johannes Jacobus SELL 1d before Results of Operations and Financial Condition (2026-04-30)
Li Dean Y SELL 1d before Results of Operations and Financial Condition (2026-04-30)

Corporate Events SEC 8-K Filings

Material corporate events reported to the SEC

Submission of Matters to a Vote 5.07

Merck & Co., Inc.

2026-05-26 SEC Filing →
Other Events 8.01,9.01

Merck & Co., Inc.

2026-05-22 SEC Filing →
Results of Operations and Financial Condition 2.02,9.01

Merck & Co., Inc.

2026-04-30 SEC Filing →

Major Shareholders SEC 13D/13G Filings

Beneficial owners holding 5%+ of outstanding shares

Owner Shares Ownership Filing Type Filing Date
The Vanguard Group SCHEDULE 13G/A
253,257,639 10.0% SCHEDULE 13G/A 2025-03-06
Vanguard Capital Management SCHEDULE 13G
186,323,766 7.5% SCHEDULE 13G 2026-04-30
The Vanguard Group SCHEDULE 13G/A
- - SCHEDULE 13G/A 2026-03-27