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Monashee Investment Management LLC

CIK:0001627608
Hedge Fund
$2B AUM
57 holdings
Boston, MA, United States
Founded:2011
15 employees
Latest filing:Jun 30, 2025

Monashee Investment Management LLC is an SEC-registered investment adviser based in Boston, Massachusetts. Founded in 2011, the firm provides investment management services across a range of strategies for institutional clients, family offices, and high-net-worth individuals. The firm manages more than $1.9 billion in assets and employs around 15 professionals, focusing on generating value through fundamental research and diversified portfolio construction.

Investment Strategy

Monashee Investment Management LLC employs a diversified investment strategy utilizing fundamental research to identify and invest in equity and equity-related securities across global markets. The firm builds concentrated portfolios with a focus on risk management, liquidity, and capital preservation, aiming to generate sustainable long-term returns for institutional and high-net-worth clients through a combination of long and short positions.

Top Buys
L
LLYELI LILLY & CO
+$15.6M
C
CORZCORE SCIENTIFIC INC NEW
+$11.9M
K
KTOSKRATOS DEFENSE & SEC SOLUTIO
+$11.6M
G
GLXYGALAXY DIGITAL INC.
+$10.3M
A
ACHRARCHER AVIATION INC
+$8.7M
Top Sells
I
IVVISHARES TR
-$161.3M
V
VOOVANGUARD INDEX FDS
-$160.9M
V
VEAVANGUARD TAX-MANAGED FDS
-$93.1M
I
IEFAISHARES TR
-$71.2M
V
VWOVANGUARD INTL EQUITY INDEX F
-$51.0M

Top Holdings

L
LLYELI LILLY & CO
+5.7%$15.6M
C
CORZCORE SCIENTIFIC INC NEW
+4.3%$11.9M
K
KTOSKRATOS DEFENSE & SEC SOLUTIO
+4.2%$11.6M
B
BBIOBRIDGEBIO PHARMA INC
+4.0%$11.0M
S
SLDBSOLID BIOSCIENCES INC
+3.8%$10.5M

Equity Positions (36)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
L
LLY
ELI LILLY & CO5.65%$15.6M20,000$779.53$779.53+$15.6M
C
CORZ
CORE SCIENTIFIC INC NEW4.33%$11.9M700,000$17.07$17.07+$11.9M
K
KTOS
KRATOS DEFENSE & SEC SOLUTIO4.21%$11.6M250,000$46.45$46.45+$11.6M
B
BBIO
BRIDGEBIO PHARMA INC3.99%$11.0M255,000$37.27$43.18+$5.0M
S
SLDB
SOLID BIOSCIENCES INC3.82%$10.5M2,165,000$5.82$4.87+$4.4M

Options Positions (10)

TickerSecurityActionTypeNotional ValueContractsUnderlying PricePremium PaidChange (Contracts)Change (Value)
Q
QXO
QXO INCNew
Put
$17.2M8,000$21.54$21.54+8,000+$17.2M
B
BRO
BROWN & BROWN INCNew
Put
$16.6M1,500$110.87$110.87+1,500+$16.6M
T
TTAN
SERVICETITAN INCNew
Put
$10.2M950$107.18$107.18+950+$10.2M
H
HNGE
HINGE HEALTH INCNew
Put
$7.2M1,400$51.75$51.75+1,400+$7.2M
C
CIFR
CIPHER MINING INCNew
Put
$5.3M11,000$4.78$4.78+11,000+$5.3M

Industry Allocation

PHARMACEUTICAL PREPARATIONS
+14.3%
SERVICES-COMPUTER PROCESSING & DATA PREPARATION
+11.3%
SERVICES-PREPACKAGED SOFTWARE
+8.1%
GUIDED MISSILES & SPACE VEHICLES & PARTS
+6.6%
WHOLESALE-LUMBER & OTHER CONSTRUCTION MATERIALS
+6.2%