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13d Management LLC

CIK:0001600133
Investment Adviser
$139M AUM
20 holdings
New York, NY, USA
Founded:2011
9 employees
Latest filing:Jun 30, 2025

New York-based SEC-registered investment adviser specializing in non-diversified domestic, long-only equity management, including activist strategies through its 13D Activist Fund LP

Investment Strategy

Non-diversified domestic, long-only equity, with a focus on companies subject to activist 13D filings

Latest 13F Filing Activity

13d Management LLC filed their most recent 13F report on Jun 30, 2025 disclosing 20 equity positions with a total 13F market value of $110M. The fund increased holdings in Charles Riv Labs Intl Inc., Qorvo Inc., Riot Platforms Inc. among other positions. 13d Management LLC reduced exposure to Insight Enterprises Inc., Rapid7 Inc., Vestis Corporation among others.

Top Buys
C
CRLCHARLES RIV LABS INTL INC
+$4.2M
Q
QRVOQORVO INC
+$2.1M
R
RIOTRIOT PLATFORMS INC
+$1.8M
T
TWLOTWILIO INC
+$1.4M
A
ALVAUTOLIV INC
+$1.2M
Top Sells
N
NSITINSIGHT ENTERPRISES INC
-$7.4M
R
RPDRAPID7 INC
-$3.3M
V
VSTSVESTIS CORPORATION
-$2.5M
M
MRCYMERCURY SYS INC
-$1.4M
P
PSOPEARSON PLC
-$700.4K

Top Holdings

T
TWLOTWILIO INC
+6.9%$7.6M
Q
QRVOQORVO INC
+6.9%$7.5M
M
MRCYMERCURY SYS INC
+6.7%$7.4M
S
SWXSOUTHWEST GAS HLDGS INC
+6.6%$7.2M
P
PSOPEARSON PLC
+6.2%$6.8M

Equity Positions (20)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
TWILIO INC6.89%$7.6M60,755$56.75$124.36+$1.4M
QORVO INC6.87%$7.5M88,740$74.42$84.91+$2.1M
MERCURY SYS INC6.73%$7.4M137,012$39.07$53.86-$1.4M
SOUTHWEST GAS HLDGS INC6.57%$7.2M96,798$64.58$74.39+$48.7K
PEARSON PLC6.24%$6.8M458,338$8.96$14.93-$700.4K

Industry Allocation

SERVICES-PREPACKAGED SOFTWARE
+10.4%
ELECTRONIC COMPONENTS & ACCESSORIES
+10.2%
SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+9.2%
SEMICONDUCTORS & RELATED DEVICES
+7.7%
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
+7.5%