Compare
Merck vs Pfizer
Merck (MRK) and Pfizer (PFE) side by side, from official filings: what insiders, members of Congress and funds reported. These are counts of what was filed, not a view on either stock.
| Merck MRKNYSE · Pharmaceuticals | Pfizer PFENYSE · Pharmaceuticals | |
|---|---|---|
| Insider records, last 12 months | 179 | 110 |
| Congress trades, last 12 months | 9 | 11 |
| Fund positions reported, last 12 months | 451 | 207 |
| Federal contract awards, last 12 months | 11 | 10 |
| Open-market purchases by insiders since 2006 | 30 | 25 |
| Open-market sales by insiders since 2006 | 391 | 880 |
| Last open-market purchase by an insider | Feb 7, 2025 | Aug 12, 2026 |
| Next results | Oct 29, 2026 | Nov 3, 2026 |
Counts of records OQRO holds, by their date. Insider history since 2006 comes from the SEC's insider transactions data sets and every filing since. Planned and automatic sales are included in the sales.
Common questions
Which has had more insider buying, Merck or Pfizer?
Since 2006, Merck insiders reported 30 open-market purchases against 25 for Pfizer, in SEC Forms 4 and 5. Counts depend on the number of insiders and how long each company has been listed.
Do members of Congress trade MRK or PFE?
In the last 12 months, members of Congress disclosed 9 trades in Merck (MRK) and 11 in Pfizer (PFE), each reported as a value range on a periodic transaction report.
When did insiders last buy MRK and PFE?
Merck: Feb 7, 2025. Pfizer: Aug 12, 2026. Dates are those of the SEC filings.
See the record behind any of these
Each company page opens free with one real filing and the counts of the last 12 months. OQRO Pro adds the full history of every insider and company since 2006, the screener, alerts, Congress trades and fund moves.
Merck pagePfizer pageRare insider trades this weekAll comparisons
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