MRK · Merck & Co. Inc. · Form 13F filings for Q2 2026
Merck
11 of 76 investors hold it
Together they reported $1.8 billion of it. In Q2 2026, 0 added and 1 reduced.
20 of 83 tracked investors have filed for Q3 2026 so far. The sheet and every stock page stay on Q2 2026 until most have filed, so each count is taken from one group of investors.
Who added and who reduced
Q2 2026 against Q1 2026, among 74 filings that can be compared. An investor counts as adding or reducing when reported shares change by 20% or more, or when a position is opened or closed.
0added or opened
1reduced or sold out
Who holds it
| Investor | Share of their portfolio | Reported value | This quarter |
|---|---|---|---|
| Kahn Brothers Group | 4.43% | $28M | No change of 20% |
| Bill Nygren | 2.06% | $1.55B | No change of 20% |
| Sarah Ketterer | 1.33% | $123M | No change of 20% |
| Prem Watsa | 0.84% | $22M | No change of 20% |
| Christopher Bloomstran | 0.65% | $6M | No change of 20% |
| Joel Greenblatt | 0.16% | $68M | No change of 20% |
| Mairs & Power Funds | 0.06% | $7M | No change of 20% |
| David Katz | 0.02% | $215K | No change of 20% |
| Dodge & Cox Funds | 0.01% | $17M | No change of 20% |
| Richard Pzena | 0.00% | $323K | No change of 20% |
| Thomas Russo | 0.00% | $211K | −23.3% |
Holders over time
How many of the same 76 investors reported a position at each quarter end, up to Q2 2026.
Where to next
Source: SEC Form 13F filings for Q2 2026, the quarter ended Jun 30, 2026, from the 76 investors on the homepage sheet · CUSIP 58933Y105 · data as of Nov 12, 2026. Weight is the share of the investor’s disclosed portfolio. Filings list long US-listed positions at quarter end. They are not live holdings, omit shorts, can be amended and give no reasons for a change.
Each investor’s filing
- Kahn Brothers Group · filed Aug 17, 2026 Form 13F 0001039565-26-000004 ↗Form 13F 0001039565-26-000006 ↗
- Bill Nygren · filed Aug 14, 2026 Form 13F 0000813917-26-000042 ↗
- Sarah Ketterer · filed Aug 13, 2026 Form 13F 0000945621-26-001052 ↗
- Prem Watsa · filed Aug 14, 2026 Form 13F 0001104659-26-096276 ↗
- Christopher Bloomstran · filed Aug 14, 2026 Form 13F 0001941040-26-000625 ↗
- Joel Greenblatt · filed Aug 14, 2026 Form 13F 0001398344-26-014644 ↗
- Mairs & Power Funds · filed Aug 14, 2026 Form 13F 0001172661-26-003496 ↗
- David Katz · filed Jul 15, 2026 Filing in the portfolio
- Dodge & Cox Funds · filed Aug 13, 2026 Form 13F 0001193125-26-349535 ↗
- Richard Pzena · filed Aug 7, 2026 Filing in the portfolio
- Thomas Russo · filed Aug 13, 2026 Filing in the portfolio