13D Management LLC

CIK

1600133

Location

New York, NY

Portfolio Value

Micro $64,496,950

Diversification

Diversified

Filing Date

Global Rank

#6,138 / 8,232 ▼ 175

Top Industry

Software - Infrastructure 11.9%

3Y Alpha vs SPY

-8.2%

Period ended 2 months ago

Filed May 15, 2026 · 29d

25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+43.6%

SPY

+76.5%

Annualised alpha

-8.0%

Max drawdown

−25.5%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

13 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

11.9%

+1.6 pts

Top 5

52.6%

+9.5 pts

Top 10

85.1%

+11.8 pts

HHI

847

Diversified+166

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Healthcare	30.7%	$19,809,418	4
Technology	28.4%	$18,290,504	3
Consumer Cyclical	24.8%	$15,970,767	4
Communication Services	9.3%	$6,017,977	1
Industrials	6.8%	$4,408,284	1

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

No qualifying positions this quarter.

Trimmed

Positions the filer reduced

4 positions

Ticker	Company	Δ Shares	Shares	Value
MRCY	Mercury Systems Inc	−43,300	60,462	$4,408,284
VSAT	Viasat Inc	−37,000	164,750	$7,545,550
EXEL	Exelixis, Inc.	−19,000	101,335	$4,346,258
CRL	Charles River Laboratories International, Inc.	−2,200	25,800	$4,450,500
No positions match the current search.

New Positions

Positions the filer opened this quarter

1 positions

Ticker	Company	Shares	Value	Open
ACHC	Acadia Healthcare Company, Inc.	294,000	$6,876,660
No positions match the current search.

Sold Out

Positions the filer fully exited

4 positions

Ticker	Company	Shares	Value
SWX	Southwest Gas Holdings, Inc.	63,798	$5,105,115
BILL	BILL Holdings, Inc.	90,000	$4,908,600
WEX	WEX Inc.	29,350	$4,372,563
LW	Lamb Weston Holdings, Inc.	76,001	$3,183,681
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

13 positions · $64,496,950 total · as of Mar 31, 2026

All sectors Communication Services Consumer Cyclical Healthcare Industrials Technology

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
TWLO	Twilio Inc Technology	Held	60,755	0	$7,644,194	−11.5%	11.85%
VSAT	Viasat Inc Technology	Reduced	164,750	-37,000	$7,545,550	+8.5%	11.70%
ACHC	Acadia Healthcare Company, Inc. Healthcare	NEW	294,000	NEW	$6,876,660	NEW	10.66%
PSO	Pearson PLC Communication Services	Held	458,338	0	$6,017,977	−6.5%	9.33%
ALV	Autoliv Inc Consumer Cyclical	Held	55,839	0	$5,872,029	−11.4%	9.10%
CRL	Charles River Laboratories International, Inc. Healthcare	Reduced	25,800	-2,200	$4,450,500	−20.3%	6.90%
MRCY	Mercury Systems Inc Industrials	Reduced	60,462	-43,300	$4,408,284	−41.8%	6.83%
EXEL	Exelixis, Inc. Healthcare	Reduced	101,335	-19,000	$4,346,258	−17.6%	6.74%
ITGR	Integer Holdings Corp Healthcare	Held	47,000	0	$4,136,000	+12.2%	6.41%
ETSY	Etsy Inc Consumer Cyclical	Held	71,836	0	$3,590,363	−9.8%	5.57%
FUN	Six Flags Entertainment Corporation/NEW Consumer Cyclical	Held	186,500	0	$3,310,375	+15.7%	5.13%
TRIP	TripAdvisor, Inc. Consumer Cyclical	Held	300,000	0	$3,198,000	−26.8%	4.96%
WK	Workiva Inc Technology	Held	52,000	0	$3,100,760	−30.9%	4.81%