What does 13D Management LLC hold?

13D Management LLC's largest disclosed positions on the most recent Form 13F-HR filing on SEC EDGAR include VSAT, TWLO, MRCY. Full top-holdings list, quarter-over-quarter position changes, and sector allocation breakdown are available at https://13fpro.ai/research/fund/1600133.

What is 13D Management LLC's AUM?

13D Management LLC reported approximately $71.3M in 13F-reportable AUM as of 2026-06-30. This figure reflects long US-listed positions disclosed on Form 13F-HR and excludes non-13F-reportable holdings (cash, short positions, certain derivatives, and non-US securities). Separately, the firm reported $99.4M in total regulatory AUM (RAUM) on its most recent Form ADV filing.

Where does 13F Pro source 13D Management LLC's holdings?

All 13D Management LLC holdings data comes directly from SEC EDGAR Form 13F-HR filings under CIK 1600133. Data refreshes automatically each quarter as new 13F filings are submitted (typically within 45 days of quarter-end). 13F Pro applies no third-party rewrites or estimates.

How often is 13D Management LLC's 13F data updated on 13F Pro?

13D Management LLC's holdings update on 13F Pro within hours of each new Form 13F-HR filing on SEC EDGAR. Quarterly position changes, accumulation/distribution flags, and sector allocation are recalculated on each refresh.

13D Management LLC

Institutional InvestorSimilar funds →SEC EDGAR: CIK 1600133

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13F Reported Value

ⓘ

$71.3M

Holdings

Latest Filing

2026-06-30

Filing Quarter

Q2 2026

Portfolio Overview

13D Management LLC disclosed 11 positions worth $71.3M in its Form 13F-HR for Q2 2026, led by $VSAT (VIASAT INC) at 15.9% of the equity portfolio, followed by $TWLO and $MRCY. During the quarter the fund opened 1 new position and exited 3 — including a new stake in $SNPS and a full exit from $ACHC. The portfolio is most concentrated in Communication Services (31.7% of disclosed assets). All figures are sourced directly from 13D Management LLC’s Form 13F-HR filing with the SEC under CIK 1600133.

AI Fund Analysis

Concentrating

Sector Allocation

Communication ServicesTechnologyHealthcareIndustrials

13fpro.ai/research/fund/13d-management-llc-1600133

AUM History

13fpro.ai/research/fund/13d-management-llc-1600133

Top Equity Holdings by Value

13fpro.ai/research/fund/13d-management-llc-1600133

Quarterly Activity — Q2 2026

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Top Holdings

AI Quality Scored

VIASAT INC
$VSAT
58.6#964
Quality
$11.3M126,250 sh
TWILIO INC
$TWLO
70.3#217
Quality
$8.0M39,000 sh
MERCURY SYSTEMS INC
$MRCY
47.4#1,740
Quality
$7.4M60,462 sh
PEARSON PLC
$PSO
—
Quality
$7.3M458,338 sh
AUTOLIV INC
$ALV
60.6
Quality
$6.5M55,839 sh
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
$CRL
43.5
Quality
$5.9M25,800 sh
SYNOPSYS INC
$SNPS
67.7
Quality
$5.6M12,650 sh
EXELIXIS, INC.
$EXEL
75.9
Quality
$5.5M101,335 sh
ETSY INC
$ETSY
60.8
Quality
$5.4M71,836 sh
Integer Holdings Corp
$ITGR
55.5
Quality
$4.4M47,000 sh

Company	Quality	Value	Shares
VIASAT INC$VSAT	58.6#964	$11.3M	126,250
TWILIO INC$TWLO	70.3#217	$8.0M	39,000
MERCURY SYSTEMS INC$MRCY	47.4#1,740	$7.4M	60,462
PEARSON PLC$PSO	—	$7.3M	458,338
AUTOLIV INC$ALV	60.6	$6.5M	55,839
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.$CRL	43.5	$5.9M	25,800
SYNOPSYS INC$SNPS	67.7	$5.6M	12,650
EXELIXIS, INC.$EXEL	75.9	$5.5M	101,335
ETSY INC$ETSY	60.8	$5.4M	71,836
Integer Holdings Corp$ITGR	55.5	$4.4M	47,000

Unlock AI quality scores for every holding

32-signal composite ranking on each of 13D Management LLC's 11 positions.

Showing top 10 of 11 holdings.

Sector Allocation

Communication Services

$22.6M

Technology

$21.1M

Healthcare

$15.8M

Industrials

$11.9M

Full Holdings — 13D Management LLC (Q2 2026)

All 11 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.

#	Ticker	Company	Value	Weight	QoQ	Quality
1	$VSAT	VIASAT INC	$11.3M	15.9%	-23%	58.6
2	$TWLO	TWILIO INC	$8.0M	11.3%	-36%	70.3
3	$MRCY	MERCURY SYSTEMS INC	$7.4M	10.4%	+0%	47.4
4	$PSO	PEARSON PLC	$7.3M	10.2%	+0%	—
5	$ALV	AUTOLIV INC	$6.5M	9.1%	+0%	60.6
6	$CRL	CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	$5.9M	8.2%	+0%	43.5
7	$SNPS	SYNOPSYS INC	$5.6M	7.9%	NEW	67.7
8	$EXEL	EXELIXIS, INC.	$5.5M	7.7%	+0%	75.9
9	$ETSY	ETSY INC	$5.4M	7.6%	+0%	60.8
10	$ITGR	Integer Holdings Corp	$4.4M	6.2%	+0%	55.5
11	$FUN	Six Flags Entertainment Corporation/NEW	$4.0M	5.6%	+0%	43

New Positions (1)

$SNPS SYNOPSYS INC$5.6M

Exited Positions (3)

$ACHC Acadia Healthcare Company, Inc.

$TRIP TripAdvisor, Inc.

$WK WORKIVA INC

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Available Analysis

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Accumulation & distribution patterns

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AI-Powered Hedge Fund Analysis: 13D Management LLC

13F Pro is an AI hedge fund tracker and stock research platform. For 13D Management LLC (SEC CIK: 1600133), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.

Every holding in 13D Management LLC's portfolio is scored on a 32-signal AI quality ranking (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.