Question 1

How many shares of MRK does WELLINGTON MANAGEMENT GROUP LLP own?

Accepted Answer

As of 2026-Q1, WELLINGTON MANAGEMENT GROUP LLP holds 84.3M shares of MRK (MERCK & CO INC).

Question 2

What is WELLINGTON MANAGEMENT GROUP LLP's MRK position worth?

Accepted Answer

As of 2026-Q1, WELLINGTON MANAGEMENT GROUP LLP's MRK position is worth $10.1B.

Question 3

Is WELLINGTON MANAGEMENT GROUP LLP buying or selling MRK?

Accepted Answer

In 2026-Q1, WELLINGTON MANAGEMENT GROUP LLP decreased their MRK position (-2.5% change in shares).

Question 4

When did WELLINGTON MANAGEMENT GROUP LLP first buy MRK?

Accepted Answer

Based on available 13F filings, WELLINGTON MANAGEMENT GROUP LLP first reported a position in MRK in 2026-Q1. They have held the position across 14 quarters.