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MRK

Congressional & insider trading activity

58
Total Trades
11
Traders
22 / 36
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
D
DeLuca Richard R.
0 buys · 4 sells
Insider 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
G
Guindo Chirfi
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

Recent Trades

Date Trader Type Amount Filed
2026-08-13 Guindo Chirfi Insider SELL - 2026-08-13
2026-08-12 DeLuca Richard R. Insider SELL - 2026-08-12
2026-08-12 Zachary Jennifer Insider SELL - 2026-08-13
2026-08-11 DeLuca Richard R. Insider SELL - 2026-08-12
2026-08-10 DeLuca Richard R. Insider SELL - 2026-08-12
2026-08-06 Guindo Chirfi Insider SELL - 2026-08-07
2026-08-06 DeLuca Richard R. Insider SELL - 2026-08-10
2026-08-05 Williams David Michael Insider SELL - 2026-08-07
2026-08-05 Maraldo David R. Insider SELL - 2026-08-07
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

Showing 20 of 58 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 120,413,256 $15,573,753,504 2026-06-30
Wellington Management Group 86,249,283 $11,083,032,867 2026-06-30
Morgan Stanley 48,641,158 $6,250,389,318 2026-06-30
FMR LLC 45,440,355 $5,839,085,718 2026-06-30
JPMorgan Chase & Co 43,886,420 $5,678,025,348 2026-06-30
Goldman Sachs Group Inc 22,075,139 $2,836,655,396 2026-06-30
Invesco Ltd 18,611,171 $2,391,535,516 2026-06-30
Dimensional Fund Advisors 17,486,486 $2,246,948,350 2026-06-30

Trade-Event Timing Trades near material events

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

Guindo Chirfi SELL 2d after Results of Operations and Financial Condition (2026-08-04)
DeLuca Richard R. SELL 2d after Results of Operations and Financial Condition (2026-08-04)
Williams David Michael SELL 1d after Results of Operations and Financial Condition (2026-08-04)
Maraldo David R. SELL 1d after Results of Operations and Financial Condition (2026-08-04)
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)

Corporate Events SEC 8-K Filings

Material corporate events reported to the SEC

Results of Operations and Financial Condition 2.02,9.01

Merck & Co., Inc.

2026-08-04 SEC Filing →
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