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Super Investors / Merck & Co., Inc.
M&

Merck & Co., Inc.

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$526M
Positions
13
Quarter ended
June 30, 2026
Filed
August 07, 2026

Reported portfolio value by quarter (7 quarters reported)

$526M $164M
Q4 24 Q2 25 Q4 25 Q2 26

$258M in Q4 2024 → $526M now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Personalis Inc 35.8% Unchanged 14,044,943 $188M
Moderna Inc 30.7% Unchanged 2,308,190 $162M
Kymera Therapeutics Inc 16.8% Unchanged 772,165 $88.5M
Aktis Oncology Inc 5.8% Unchanged 952,844 $30.7M
Eikon Therapeutics Inc 4.1% Unchanged 1,666,666 $21.7M
Entrada Therapeutics Inc 2.4% New 1,739,768 $12.8M
Sutro Biopharma Inc 1.7% New 272,351 $9.04M
Alector Inc 1.4% Unchanged 3,545,719 $7.13M
EB Evaxion Biotech A/s 0.7% New 1,214,126 $3.76M
VT Viridian Therapeutics Inc 0.3% Unchanged 93,414 $1.72M
Xilio Therapeutics Inc 0.2% Unchanged 105,982 $1.02M
Tuhura Biosciences Inc 0.0% Unchanged 19,445 $45.5K
Neuphoria Therapeutics Inc 0.0% Unchanged 10,027 $43.8K

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 6 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 07, 2026

Company Action Shares changed Value of change % of portfolio
Entrada Therapeutics Inc Exited −1,739,768 −$22M
Entrada Therapeutics Inc New +1,739,768 +$12.8M 2.4%
Sutro Biopharma Inc New +272,351 +$9.04M 1.7%
Sutro Biopharma Inc Exited −272,351 −$6.78M
EB Evaxion Biotech A/s Exited −1,214,126 −$4.52M
EB Evaxion Biotech A/s New +1,214,126 +$3.76M 0.7%
Carisma Therapeutics Inc Exited −1,473,240 −$47.9K

Q1 2026

quarter ended March 31, 2026 · filed May 13, 2026

Company Action Shares changed Value of change % of portfolio
Eikon Therapeutics Inc New +1,666,666 +$17.6M 5.0%
Aktis Oncology Inc New +952,844 +$17M 4.9%
Xilio Therapeutics Inc Exited −1,483,758 −$950K
Xilio Therapeutics Inc New +105,982 +$891K 0.3%
Tuhura Biosciences Added +5,495 +$9.84K

Q4 2025

quarter ended December 31, 2025 · filed February 17, 2026

Company Action Shares changed Value of change % of portfolio
Sutro Biopharma Inc Trimmed −2,451,158 −$28.4M 1.1%
Lava Therapeutics Nv Exited −1,149,345 −$1.79M

Q3 2025

quarter ended September 30, 2025 · filed November 12, 2025

No position changes this quarter.

Q2 2025

quarter ended June 30, 2025 · filed August 13, 2025

Company Action Shares changed Value of change % of portfolio
Tuhura Biosciences New +13,950 +$31.1K

Q1 2025

quarter ended March 31, 2025 · filed May 14, 2025

Company Action Shares changed Value of change % of portfolio
Absci Corporation Exited −998,163 −$2.62M
EB Evaxion Biotech A/s Added +671,847 +$1.24M 1.4%

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