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13D Management LLC

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13F filer, CIK 1600133, New York, NY

13D Management LLC reported $84,045,307 across 16 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-17. Its ten largest share positions make up 73.28% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001172661-26-000830

Period
2025-12-31
Reported value
$84M
Holdings
16
Top 10 weight
73.28%
New
4
Sold out
6

Largest buys vs the previous quarter

SecurityShares changeApprox. value
WKnew+52,000$4.49M
WEXnew+29,350$4.37M
ITGRnew+47,000$3.69M
FUNnew+186,500$2.86M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
QRVOexited-88,740-$8.08M
JHGexited-134,654-$5.99M
ABGexited-21,337-$5.22M
MTCHexited-132,779-$4.69M
PFGCexited-43,000-$4.47M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0001172661-26-000830, largest first. % of portfolio is the value over $84,045,307, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
TWLOTWILIO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 98,893 shares; 2024Q4: 90,757 shares; 2025Q1: 62,540 shares; 2025Q2: 60,755 shares; 2025Q3: 60,755 shares; 2025Q4: 60,755 shares 60,755$8.64M10.28%0Timeline
MRCYMERCURY SYS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 131,508 shares; 2024Q4: 221,015 shares; 2025Q1: 202,701 shares; 2025Q2: 137,012 shares; 2025Q3: 137,012 shares; 2025Q4: 103,762 shares 103,762$7.58M9.01%-33,250Timeline
VSATVIASAT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 267,000 shares; 2025Q4: 201,750 shares 201,750$6.95M8.27%-65,250Timeline
ALVAUTOLIV INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 54,047 shares; 2024Q4: 62,589 shares; 2025Q1: 57,400 shares; 2025Q2: 55,839 shares; 2025Q3: 55,839 shares; 2025Q4: 55,839 shares 55,839$6.63M7.89%0Timeline
PSOPEARSON PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 512,732 shares; 2024Q4: 513,759 shares; 2025Q1: 471,167 shares; 2025Q2: 458,338 shares; 2025Q3: 458,338 shares; 2025Q4: 458,338 shares 458,338$6.44M7.66%0Timeline
CRLCHARLES RIV LABS INTL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 28,000 shares; 2025Q3: 28,000 shares; 2025Q4: 28,000 shares 28,000$5.59M6.65%0Timeline
EXELEXELIXIS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 360,575 shares; 2024Q4: 228,610 shares; 2025Q1: 147,506 shares; 2025Q2: 143,335 shares; 2025Q3: 120,335 shares; 2025Q4: 120,335 shares 120,335$5.27M6.28%0Timeline
SWXSOUTHWEST GAS HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 131,831 shares; 2024Q4: 132,109 shares; 2025Q1: 99,611 shares; 2025Q2: 96,798 shares; 2025Q3: 63,798 shares; 2025Q4: 63,798 shares 63,798$5.11M6.07%0Timeline
BILLBILL HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 90,000 shares; 2025Q4: 90,000 shares 90,000$4.91M5.84%0Timeline
WKWORKIVA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 52,000 shares 52,000$4.49M5.34%newTimeline
WEXWEX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 29,350 shares 29,350$4.37M5.2%newTimeline
TRIPTRIPADVISOR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 300,000 shares; 2025Q4: 300,000 shares 300,000$4.37M5.2%0Timeline
ETSYETSY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 87,817 shares; 2024Q4: 87,258 shares; 2025Q1: 80,025 shares; 2025Q2: 77,836 shares; 2025Q3: 77,836 shares; 2025Q4: 71,836 shares 71,836$3.98M4.74%-6,000Timeline
ITGRINTEGER HLDGS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 47,000 shares 47,000$3.69M4.39%newTimeline
LWLAMB WESTON HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 90,294 shares; 2025Q1: 82,807 shares; 2025Q2: 80,582 shares; 2025Q3: 76,001 shares; 2025Q4: 76,001 shares 76,001$3.18M3.79%0Timeline
FUNSIX FLAGS ENTERTAINMENT CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 186,500 shares 186,500$2.86M3.4%newTimeline

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
QRVOQORVO INC88,740$8.08Mshares
JHGJANUS HENDERSON GROUP PLC134,654$5.99Mshares
ABGASBURY AUTOMOTIVE GROUP INC21,337$5.22Mshares
MTCHMATCH GROUP INC NEW132,779$4.69Mshares
PFGCPERFORMANCE FOOD GROUP CO43,000$4.47Mshares
YETIYETI HLDGS INC132,000$4.38Mshares

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001172661-26-000830 base2026-02-17acceptance time not in the bulk data set