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Greenhaven Road Investment Management, L.P.

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13F filer, CIK 1741129, GREENWICH, CT

Greenhaven Road Investment Management, L.P. reported $677,649,646 across 17 holdings for the quarter ended 2025-09-30, in a 13F-HR/A filed 2025-12-01. Its ten largest share positions make up 97.41% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR/A 0001420506-25-003515

Period
2025-09-30
Reported value
$678M
Holdings
17
Top 10 weight
97.41%
New
2
Sold out
4

Largest buys vs the previous quarter

SecurityShares changeApprox. value
HGTYadded+853,245$10.3M
ASTSadded+61,111$3M
CLBTadded+135,000$2.5M
ALLTadded+133,619$1.41M
QRHCadded+17,801$27.9K

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
BNEDexited-984,162-$11.6M
ALTGexited-1,360,501-$8.6M
SOCreduced-356,544-$6.23M
KKRreduced-15,000-$1.95M
LPXreduced-15,000-$1.33M

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, Q3 2025

Share positions as resolved from 13F-HR/A 0001420506-25-003515, largest first. % of portfolio is the value over $242,343,276, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
PARPAR TECHNOLOGY CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,200,374 shares; 2024Q4: 878,258 shares; 2025Q1: 1,007,289 shares; 2025Q2: 995,014 shares; 2025Q3: 973,198 shares 973,198$38.5M15.89%-21,816Timeline
HGTYHAGERTY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,508,448 shares; 2024Q4: 1,236,170 shares; 2025Q1: 1,360,506 shares; 2025Q2: 1,811,539 shares; 2025Q3: 2,664,784 shares 2,664,784$32.1M13.24%+853,245Timeline
CLBTCELLEBRITE DI LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,086,411 shares; 2024Q4: 1,975,541 shares; 2025Q1: 1,572,093 shares; 2025Q2: 1,518,047 shares; 2025Q3: 1,653,047 shares 1,653,047$30.6M12.64%+135,000Timeline
KKRKKR & CO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 278,700 shares; 2024Q4: 266,700 shares; 2025Q1: 244,700 shares; 2025Q2: 234,700 shares; 2025Q3: 219,700 shares 219,700$28.6M11.78%-15,000Timeline
LFCRLIFECORE BIOMEDICAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,228,784 shares; 2024Q4: 3,616,146 shares; 2025Q1: 3,616,146 shares; 2025Q2: 3,694,832 shares; 2025Q3: 3,694,832 shares 3,694,832$27.2M11.22%0Timeline
BURBURFORD CAPITAL LIMITEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,622,622 shares; 2024Q4: 1,607,622 shares; 2025Q1: 1,607,622 shares; 2025Q2: 1,625,330 shares; 2025Q3: 1,602,812 shares 1,602,812$19.2M7.91%-22,518Timeline
KWYKINGSWAY CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 509,291 shares; 2024Q4: 511,060 shares; 2025Q1: 755,645 shares; 2025Q2: 1,310,536 shares; 2025Q3: 1,310,536 shares 1,310,536$19.2M7.91%0Timeline
LPXLOUISIANA PAC CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 141,117 shares; 2024Q4: 151,617 shares; 2025Q1: 194,917 shares; 2025Q2: 201,417 shares; 2025Q3: 186,417 shares 186,417$16.6M6.83%-15,000Timeline
ASTSAST SPACEMOBILE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 268,000 shares; 2025Q3: 329,111 shares 329,111$16.2M6.67%+61,111Timeline
ALLTALLOT LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 100,000 shares; 2025Q1: 168,298 shares; 2025Q2: 626,024 shares; 2025Q3: 759,643 shares 759,643$8.04M3.32%+133,619Timeline
SOCSABLE OFFSHORE CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 501,613 shares; 2024Q4: 623,364 shares; 2025Q1: 600,889 shares; 2025Q2: 645,889 shares; 2025Q3: 289,345 shares 289,345$5.05M2.08%-356,544Timeline
NNNEXTNAV INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 60,000 shares; 2025Q2: 60,000 shares; 2025Q3: 60,000 shares 60,000$858K0.35%0Timeline
MTRXMATRIX SVC COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 15,685 shares; 2024Q4: 13,931 shares; 2025Q1: 13,969 shares; 2025Q2: 13,969 shares; 2025Q3: 13,969 shares 13,969$183K0.08%0Timeline
RSSSRESEARCH SOLUTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 36,326 shares; 2024Q4: 40,251 shares; 2025Q1: 37,743 shares; 2025Q2: 38,477 shares; 2025Q3: 38,477 shares 38,477$144K0.06%0Timeline
QRHCQUEST RESOURCE HLDG CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 11,054 shares; 2025Q1: 11,482 shares; 2025Q2: 12,976 shares; 2025Q3: 30,777 shares 30,777$48.2K0.02%+17,801Timeline

Options

Puts and calls, as filed. The amount and value describe the underlying shares, not the option premium, so they stay out of % of portfolio (H5).

SecurityTypeAmountValueChange
TLTISHARES TR 20 YR TR BD ETFput4,166,500$370Mnew
IWMISHARES TR SHSput271,000$65.6Mnew

Sold out in Q3 2025

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

SecurityShares beforeValue beforeType
BNEDBARNES & NOBLE ED INC984,162$11.6Mshares
ALTGALTA EQUIPMENT GROUP INC1,360,501$8.6Mshares
SABLE OFFSHORE CORPSABLE OFFSHORE CORP325,000$7.14Mcall
CORECARD CORPORATIONCORECARD CORPORATION7,434$215Kshares

How Q3 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 0001420506-25-003102 superseded2025-11-12acceptance time not in the bulk data set
13F-HR/A 0001420506-25-003515 baserestatement2025-12-01acceptance time not in the bulk data set