Institutional Manager · CIK 0000310158
Merck & Co., Inc.
RAHWAY, NJ · File #028-25193
Latest AUM
$276.3M
Positions
12
Top-10 Concentration
100.0%
Filings
5
Portfolio Value Over Time
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | SUTRO BIOPHARMA INC | STRO | -2,451,158 | -$28.4M | +$29.1M |
| EXITED | LAVA THERAPEUTICS NV | N51517105 | -1,149,345 | -$1.8M | $0 |
| REDUCE | ALECTOR INC | ALEC | 0 | $0 | -$5.0M |
| REDUCE | CARISMA THERAPEUTICS INC | CARM | 0 | $0 | -$340,319 |
| REDUCE | ENTRADA THERAPEUTICS INC | TRDA | 0 | $0 | +$7.8M |
| REDUCE | EVAXION BIOTECH A/S | 29970R204 | 0 | $0 | +$1.2M |
| REDUCE | KYMERA THERAPEUTICS INC | KYMR | 0 | $0 | +$16.4M |
| REDUCE | MODERNA INC | MRNA | 0 | $0 | +$8.4M |
| REDUCE | NEUPHORIA THERAPEUTICS INC | NEUP | 0 | $0 | -$79,313 |
| REDUCE | PERSONALIS INC | PSNL | 0 | $0 | +$20.2M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202512 pos · $276.3M
- 13F HOLDINGS REPORTQ/E Sep 202513 pos · $228.0M
- 13F HOLDINGS REPORTQ/E Jun 202513 pos · $215.6M
- 13F HOLDINGS REPORTQ/E Mar 202512 pos · $164.3M
- 13F HOLDINGS REPORTQ/E Dec 202413 pos · $258.0M
Top 12 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | PERSONALIS INC | PSNL | 14,044,943 | $111.8M | 40.47% |
| 2 | MODERNA INC | MRNA | 2,308,190 | $68.1M | 24.64% |
| 3 | KYMERA THERAPEUTICS INC | KYMR | 772,165 | $60.1M | 21.75% |
| 4 | ENTRADA THERAPEUTICS INC | TRDA | 1,739,768 | $17.9M | 6.47% |
| 5 | EVAXION BIOTECH A/S | 29970R204 | 1,214,126 | $5.8M | 2.10% |
| 6 | ALECTOR INC | ALEC | 3,545,719 | $5.5M | 2.00% |
| 7 | SUTRO BIOPHARMA INC | STRO | 272,351 | $3.2M | 1.14% |
| 8 | VIRIDIAN THERAPEUTICS INC | VRDN | 93,414 | $2.9M | 1.05% |
| 9 | XILIO THERAPEUTICS INC | XLO | 1,483,758 | $949,902 | 0.34% |
| 10 | CARISMA THERAPEUTICS INC | CARM | 1,473,240 | $63,349 | 0.02% |
| 11 | NEUPHORIA THERAPEUTICS INC | NEUP | 10,027 | $38,905 | 0.01% |
| 12 | TUHURA BIOSCIENCES | HURA | 13,950 | $10,556 | 0.00% |