Merck & Co., Inc.

CIK 0000310158 · RAHWAY, NJ · Quarter end: 2026-06-30 · Filed on: 2026-08-07 · Open the SEC source

Merck & Co., Inc. reported 13 positions worth $526.4M as of June 30, 2026 (13F filed August 7, 2026). Largest holding: PSNL (35.8%).

Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.
$526.4M
2026 Q2
Positions
13
Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.
99.8%
Est. Net Flow (Q)
2026 Q2
10 / 13 positions shown
#SymbolCompanyTypeValue% Port.Shares1YYTD
1PSNLPERSONALIS INCSH$188.2M35.75%14,044,943
2MRNAMODERNA INCSH$161.6M30.71%2,308,190
3KYMRKYMERA THERAPEUTICS INCSH$88.5M16.82%772,165
4AKTSAKTIS ONCOLOGY INCSH$30.7M5.83%952,844
5EIKNEIKON THERAPEUTICS INCSH$21.7M4.13%1,666,666
6TRDAENTRADA THERAPEUTICS INCSH$12.8M2.43%1,739,768
7STROSUTRO BIOPHARMA INCSH$9.0M1.72%272,351
8ALECALECTOR INCSH$7.1M1.35%3,545,719
9EVAXEVAXION BIOTECH A/SSH$3.8M0.71%1,214,126
10VRDNVIRIDIAN THERAPEUTICS INCSH$1.7M0.33%93,414

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Read the 2026-Q2 quarterly report · 13F Filing Calendar

Frequently Asked Questions

What stocks does Merck & Co., Inc. hold as of Q2 2026?

Merck & Co., Inc. reported 13 positions worth $526.4M in its Q2 2026 13F filing. Largest positions: PSNL (35.8%), MRNA (30.7%), KYMR (16.8%), AKTS (5.8%) and EIKN (4.1%).

What did Merck & Co., Inc. buy in Q2 2026?

No previous quarter is available yet; the comparison appears with the next filing.

What did Merck & Co., Inc. sell in Q2 2026?

No previous quarter is available yet.

13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.