13D Management LLC

CIK

1600133

Location

New York, NY

Portfolio Value

Micro $64,496,950

Diversification

Diversified

Filing Date

Global Rank

#6,509 / 8,622 ▼ 310 · as of Mar 2026

Top Industry

Software - Infrastructure 11.9%

3Y Alpha vs SPY

-6.1%

Period ended 4 months ago

Filed May 15, 2026 · 2mo

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio

+48.6%

SPY

+67.9%

Annualised alpha

-4.7%

Max drawdown

−25.6%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. It tracks 100% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

13 tracked 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 tracked 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%

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.