Stocks/Funds/CIK 310158

Merck & Co., Inc.

concentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 310158
Assets
$349M
+112.7% YoY
Holdings
14
Lifetime alpha vs market
+5.62% annual
Average hold time
1.2 yr
median 1.5 yr

Quarterly history

Cum return +21% vs S&P +13% · α +8% lifetimeAUM $349M · peak $349MFlow $34M (+12%)2024-122025-032025-062025-092025-122026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+0.00%
trims when stocks drop
when a holding falls −10%+
Middle response
+0.00%
baseline attrition
Rally response
-1.93%
trims into rallies
when a holding rises +10%+

Top positions · 14

Ticker$ value% portYoYHold time
MRNAModerna, Inc.$117M33.6%+79.2%1.5 yr
PSNLPersonalis, Inc.$89M25.6%+81.5%1.5 yr
KYMRKymera Therapeutics, Inc$64M18.4%+204.3%1.5 yr
$22M6.3%1.5 yr
EIKNEikon Therapeutics, Inc.$18M5.0%0.3 yr
AKTSAktis Oncology, Inc.$17M4.9%0.3 yr
ALECAlector, Inc.$8M2.2%+74.8%1.5 yr
STROSutro Biopharma, Inc.$7M1.9%+282.6%1.5 yr
$5M1.3%1.5 yr
VRDNViridian Therapeutics, I$2M0.5%+45.1%1.5 yr
XLOXilio Therapeutics, Inc.$1M0.3%0.3 yr
CARMCarisma Therapeutics, In$0M0.0%1.5 yr
NEUPNeuphoria Therapeutics I$0M0.0%-29.3%1.5 yr
HURATuHURA Biosciences, Inc.$0M0.0%-44.6%1.0 yr

Portfolio composition (YoY)

Industry mix
Biotechnology66.8%+8.4pp$233M
Medical - Diagnostics & Research25.6%-4.4pp$89M
Unknown7.6%-4.0pp$26M
Medical - Pharmaceuticals0.0%-0.0pp$0M
Country
US92.4%+4.9pp
Unknown7.6%-4.0pp
Top 5: 88.9% · Top 10: 99.7% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
MRNA$65M+0.05B79.2%
STRO$2M+0.05B282.6%
KYMR$21M+0.04B204.3%
PSNL$49M+0.04B81.5%
ALEC$4M+0.00B74.8%

Losers

TickerPrev $PnLYoY %
NEUP$0M-0.00B-29.3%

Top buys this quarter · 4

EIKN Eikon Therapeutics, Inc. Commonew+$18M
AKTS Aktis Oncology, Inc.new+$17M
XLO Xilio Therapeutics, Inc.new+$1M
HURA TuHURA Biosciences, Inc.+$0M

Top sells this quarter · 1

exit$0M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$349M14+100.69%+17.59%+83.10%+0.03B
2025-12-31$276M12+5.53%+17.72%-12.18%+0.00B
2025-09-30$228M13+7.37%+8.12%-0.75%-0.00B
2025-06-30$216M13+35.16%+10.78%+24.39%-0.01B
2025-03-31$164M12-39.94%-4.27%-35.68%+0.01B
2024-12-31$258M13