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13D Management LLC

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13F filer, CIK 1600133, New York, NY

13D Management LLC reported $113,411,281 across 21 holdings for the quarter ended 2025-03-31, in a 13F-HR filed 2025-05-15. Its ten largest share positions make up 59.11% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001172661-25-001944

Period
2025-03-31
Reported value
$113M
Holdings
21
Top 10 weight
59.11%
New
4
Sold out
4

Largest buys vs the previous quarter

SecurityShares changeApprox. value
YETInew+168,559$5.58M
QRVOnew+74,474$5.39M
KVUEnew+186,740$4.48M
MIDDnew+26,873$4.08M
APDadded+7,153$2.11M

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
CNIexited-54,413-$5.52M
BLCOexited-272,048-$4.91M
HRexited-284,350-$4.82M
EXELreduced-81,104-$2.99M
TWLOreduced-28,217-$2.76M

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, Q1 2025

Share positions as resolved from 13F-HR 0001172661-25-001944, largest first. % of portfolio is the value over $113,411,281, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
MRCYMERCURY SYS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 131,508 shares; 2024Q4: 221,015 shares; 2025Q1: 202,701 shares 202,701$8.73M7.7%-18,314Timeline
PSOPEARSON PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 512,732 shares; 2024Q4: 513,759 shares; 2025Q1: 471,167 shares 471,167$7.54M6.65%-42,592Timeline
NSITINSIGHT ENTERPRISES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 53,374 shares; 2024Q4: 53,476 shares; 2025Q1: 49,043 shares 49,043$7.36M6.49%-4,433Timeline
APDAIR PRODUCTS AND CHEMICALS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 17,450 shares; 2025Q1: 24,603 shares 24,603$7.26M6.4%+7,153Timeline
SWXSOUTHWEST GAS HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 131,831 shares; 2024Q4: 132,109 shares; 2025Q1: 99,611 shares 99,611$7.15M6.31%-32,498Timeline
ABGASBURY AUTOMOTIVE GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 30,302 shares; 2024Q4: 30,361 shares; 2025Q1: 27,844 shares 27,844$6.15M5.42%-2,517Timeline
TWLOTWILIO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 98,893 shares; 2024Q4: 90,757 shares; 2025Q1: 62,540 shares 62,540$6.12M5.4%-28,217Timeline
VSTSVESTIS CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 554,826 shares; 2024Q4: 627,787 shares; 2025Q1: 575,737 shares 575,737$5.7M5.03%-52,050Timeline
YETIYETI HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 168,559 shares 168,559$5.58M4.92%newTimeline
EXELEXELIXIS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 360,575 shares; 2024Q4: 228,610 shares; 2025Q1: 147,506 shares 147,506$5.45M4.8%-81,104Timeline
QRVOQORVO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 74,474 shares 74,474$5.39M4.75%newTimeline
ALVAUTOLIV INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 54,047 shares; 2024Q4: 62,589 shares; 2025Q1: 57,400 shares 57,400$5.08M4.48%-5,189Timeline
JHGJANUS HENDERSON GROUP PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 187,513 shares; 2024Q4: 150,953 shares; 2025Q1: 138,440 shares 138,440$5M4.41%-12,513Timeline
KVUEKENVUE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 186,740 shares 186,740$4.48M3.95%newTimeline
LWLAMB WESTON HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 90,294 shares; 2025Q1: 82,807 shares 82,807$4.41M3.89%-7,487Timeline
MTCHMATCH GROUP INC NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 148,638 shares; 2024Q4: 148,828 shares; 2025Q1: 136,489 shares 136,489$4.26M3.75%-12,339Timeline
MIDDMIDDLEBY CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 26,873 shares 26,873$4.08M3.6%newTimeline
ETSYETSY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 87,817 shares; 2024Q4: 87,258 shares; 2025Q1: 80,025 shares 80,025$3.78M3.33%-7,233Timeline
RIOTRIOT PLATFORMS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 508,500 shares; 2025Q1: 466,366 shares 466,366$3.32M2.93%-42,134Timeline
RPDRAPID7 INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 135,600 shares; 2025Q1: 124,365 shares 124,365$3.3M2.91%-11,235Timeline
PENNPENN ENTERTAINMENT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 218,846 shares; 2024Q4: 218,654 shares; 2025Q1: 200,528 shares 200,528$3.27M2.88%-18,126Timeline

Sold out in Q1 2025

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

SecurityShares beforeValue beforeType
CNICANADIAN NATL RY CO54,413$5.52Mshares
BLCOBAUSCH PLUS LOMB CORP272,048$4.91Mshares
HRHEALTHCARE RLTY TR284,350$4.82Mshares
FTREFORTREA HLDGS INC132,425$2.47Mshares

How Q1 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 0001172661-25-001944 base2025-05-15acceptance time not in the bulk data set