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Disclosery

Madison Avenue Partners, LP

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13F filer, CIK 1801265, NEW YORK, NY

Madison Avenue Partners, LP reported $2,323,000,202 across 25 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-14. Its ten largest share positions make up 77.08% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001801265-26-000005

Period
2026-06-30
Reported value
$2.32B
Holdings
25
Top 10 weight
77.08%
New
7
Sold out
9

Largest buys vs the previous quarter

SecurityShares changeApprox. value
INVHnew+8,335,309$252M
OCTVnew+4,222,663$68.8M
CPNGadded+3,093,574$53.7M
STAAadded+1,734,070$49.8M
MKLadded+24,436$47.7M

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
SNDKreduced-609,312-$1.39B
ICLRexited-1,282,838-$142M
MOHexited-633,877-$84.5M
INDVreduced-1,440,794-$59.1M
WLYexited-678,417-$25.8M

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, Q2 2026

Share positions as resolved from 13F-HR 0001801265-26-000005, largest first. % of portfolio is the value over $2,323,000,202, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
GHCGRAHAM HLDGS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 235,271 shares; 2024Q4: 235,271 shares; 2025Q1: 245,271 shares; 2025Q2: 245,271 shares; 2025Q3: 245,829 shares; 2025Q4: 245,829 shares; 2026Q1: 245,829 shares; 2026Q2: 246,368 shares 246,368$281M12.11%+539Timeline
INVHINVITATION HOMES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 8,335,309 shares 8,335,309$252M10.84%newTimeline
MKLMARKEL GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 91,357 shares; 2025Q2: 84,310 shares; 2025Q3: 84,310 shares; 2025Q4: 87,889 shares; 2026Q1: 87,889 shares; 2026Q2: 112,325 shares 112,325$219M9.44%+24,436Timeline
CPNGCOUPANG INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 9,363,621 shares; 2026Q2: 12,457,195 shares 12,457,195$216M9.31%+3,093,574Timeline
MICCMAGNUM ICE CREAM CO NVQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 6,429,296 shares; 2026Q1: 11,445,529 shares; 2026Q2: 10,892,592 shares 10,892,592$190M8.16%-552,937Timeline
TBPHTHERAVANCE BIOPHARMA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 9,511,150 shares; 2024Q4: 9,511,150 shares; 2025Q1: 9,511,150 shares; 2025Q2: 9,511,150 shares; 2025Q3: 9,511,150 shares; 2025Q4: 9,511,150 shares; 2026Q1: 9,511,150 shares; 2026Q2: 9,212,252 shares 9,212,252$157M6.74%-298,898Timeline
SOLVSOLVENTUM CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 2,827,672 shares; 2024Q4: 2,827,672 shares; 2025Q1: 2,813,017 shares; 2025Q2: 2,244,344 shares; 2025Q3: 1,988,376 shares; 2025Q4: 1,988,058 shares; 2026Q1: 1,875,736 shares; 2026Q2: 1,741,221 shares 1,741,221$134M5.78%-134,515Timeline
STAASTAAR SURGICAL COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 2,441,678 shares; 2026Q2: 4,175,748 shares 4,175,748$120M5.16%+1,734,070Timeline
INDVINDIVIOR PHARMACEUTICALS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 6,280,502 shares; 2026Q1: 4,315,162 shares; 2026Q2: 2,874,368 shares 2,874,368$118M5.08%-1,440,794Timeline
LKFTLAKEFRONT BIOTHERAPEUTICS NVQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 1,877,011 shares; 2025Q3: 2,195,775 shares; 2025Q4: 2,213,169 shares; 2026Q1: 2,465,179 shares; 2026Q2: 3,447,807 shares 3,447,807$103M4.45%+982,628Timeline
GMEDGLOBUS MED INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 1,137,050 shares; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 1,712,148 shares; 2025Q3: 2,548,163 shares; 2025Q4: 2,624,751 shares; 2026Q1: 717,476 shares; 2026Q2: 935,216 shares 935,216$73.9M3.18%+217,740Timeline
OCTVOCTAVE INTELLIGENCE PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 4,222,663 shares 4,222,663$68.8M2.96%newTimeline
BTIBRITISH AMERN TOB PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 1,223,767 shares; 2025Q4: 1,223,767 shares; 2026Q1: 1,123,767 shares; 2026Q2: 1,043,302 shares 1,043,302$64.4M2.77%-80,465Timeline
STGWSTAGWELL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 7,147,662 shares; 2024Q4: 7,147,662 shares; 2025Q1: 7,147,662 shares; 2025Q2: 8,014,322 shares; 2025Q3: 8,014,322 shares; 2025Q4: 8,014,322 shares; 2026Q1: 8,014,322 shares; 2026Q2: 8,014,322 shares 8,014,322$59.5M2.56%0Timeline
SANMSANMINA CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 188,322 shares 188,322$47.7M2.05%newTimeline
PRIMPRIMORIS SVCS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 462,058 shares 462,058$45.8M1.97%newTimeline
ADARRAY DIGITAL INFRASTRUCTUREQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 1,109,463 shares 1,109,463$40.2M1.73%newTimeline
AIVAPARTMENT INVT & MGMT COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 1,473,826 shares; 2025Q3: 3,617,314 shares; 2025Q4: not reported; 2026Q1: 12,374,991 shares; 2026Q2: 12,374,991 shares 12,374,991$36.8M1.58%0Timeline
SNDKSANDISK CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 3,571,109 shares; 2025Q3: 2,062,521 shares; 2025Q4: 1,434,172 shares; 2026Q1: 619,010 shares; 2026Q2: 9,698 shares 9,698$22.1M0.95%-609,312Timeline
TPBTURNING PT BRANDS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 247,723 shares; 2026Q1: 247,723 shares; 2026Q2: 247,823 shares 247,823$21M0.9%+100Timeline
SBGISINCLAIR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 909,653 shares; 2026Q1: 1,473,484 shares; 2026Q2: 1,383,470 shares 1,383,470$19.7M0.85%-90,014Timeline
MAGNMAGNERA CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: 3,406,293 shares; 2025Q1: 3,344,005 shares; 2025Q2: 3,344,005 shares; 2025Q3: 2,832,281 shares; 2025Q4: 1,780,649 shares; 2026Q1: 1,590,616 shares; 2026Q2: 1,302,066 shares 1,302,066$15.3M0.66%-288,550Timeline
MRPMILLROSE PPTYS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 825,804 shares; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 298,461 shares 298,461$8.97M0.39%newTimeline
KROSKEROS THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 2,691,465 shares; 2025Q3: 2,708,218 shares; 2025Q4: 823,707 shares; 2026Q1: 626,583 shares; 2026Q2: 626,583 shares 626,583$6.7M0.29%0Timeline
MNROMONRO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 95,966 shares 95,966$1.64M0.07%newTimeline

Sold out in Q2 2026

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

SecurityShares beforeValue beforeType
ICLRICON PUB LTD CO1,282,838$142Mshares
MOHMOLINA HEALTHCARE INC633,877$84.5Mshares
WLYWILEY JOHN & SONS INC678,417$25.8Mshares
PRMBPRIMO BRANDS CORPORATION1,321,942$24.9Mshares
DNOWDNOW INC1,365,067$16.3Mshares
CBCCENTRAL BANCOMPANY444,933$10.7Mshares
PARPAR TECHNOLOGY CORP447,878$5.97Mshares
FSPFRANKLIN STR PPTYS CORP1,080,132$718Kshares
SNSHARKNINJA INC6,152$651Kshares

How Q2 2026 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 0001801265-26-000005 base2026-08-14acceptance time not in the bulk data set

Filings

Every filing of this filer: 13F reports and notices, the 13D and 13G it filed or is a reporting person of, and Forms 3, 4 and 5 it reported as an owner.

FilingSubjectFiledAcceptedIngested
13F-HR 0001801265-26-000005 Quarter ended 2026-06-302026-08-14acceptance time not in the bulk data set
13F-HR 0001801265-26-000003 Quarter ended 2026-03-312026-05-15acceptance time not in the bulk data set
13F-HR 0001801265-26-000002 Quarter ended 2025-12-312026-02-17acceptance time not in the bulk data set
13F-HR 0001801265-25-000008 Quarter ended 2025-09-302025-11-14acceptance time not in the bulk data set
13F-HR 0001801265-25-000005 Quarter ended 2025-06-302025-08-14acceptance time not in the bulk data set
13F-HR 0001801265-25-000004 Quarter ended 2025-03-312025-05-15acceptance time not in the bulk data set
13F-HR 0001801265-25-000002 Quarter ended 2024-12-312025-02-14acceptance time not in the bulk data set
13F-HR 0001801265-24-000012 Quarter ended 2024-09-302024-11-14acceptance time not in the bulk data set
13F-HR 0001801265-24-000009 Quarter ended 2024-06-302024-08-14acceptance time not in the bulk data set
13F-HR 0001801265-24-000006 Quarter ended 2024-03-312024-05-15acceptance time not in the bulk data set
13F-HR 0001801265-24-000004 Quarter ended 2023-12-312024-02-16acceptance time not in the bulk data set
13F-HR 0001801265-23-000007 Quarter ended 2023-09-302023-11-14acceptance time not in the bulk data set
13F-HR 0001801265-23-000005 Quarter ended 2023-06-302023-08-14acceptance time not in the bulk data set
13F-HR 0001801265-23-000004 Quarter ended 2023-03-312023-05-15acceptance time not in the bulk data set
13F-HR 0001801265-23-000003 Quarter ended 2022-12-312023-02-14acceptance time not in the bulk data set
13F-HR 0001801265-22-000007 Quarter ended 2022-09-302022-11-14acceptance time not in the bulk data set
13F-HR 0001801265-22-000006 Quarter ended 2022-06-302022-08-15acceptance time not in the bulk data set
13F-HR 0001801265-22-000004 Quarter ended 2022-03-312022-05-16acceptance time not in the bulk data set
13F-HR 0001801265-22-000002 Quarter ended 2021-12-312022-02-14acceptance time not in the bulk data set
13F-HR 0001801265-21-000008 Quarter ended 2021-09-302021-11-15acceptance time not in the bulk data set
13F-HR 0001801265-21-000007 Quarter ended 2021-06-302021-08-16acceptance time not in the bulk data set
13F-HR 0001801265-21-000005 Quarter ended 2021-03-312021-05-17acceptance time not in the bulk data set
13F-HR 0001801265-21-000002 Quarter ended 2020-12-312021-02-12acceptance time not in the bulk data set
13F-HR 0001801265-20-000010 Quarter ended 2020-09-302020-11-16acceptance time not in the bulk data set
13F-HR 0001801265-20-000008 Quarter ended 2020-06-302020-08-14acceptance time not in the bulk data set
13F-HR/A 0001801265-20-000005 Quarter ended 2020-03-312020-05-22acceptance time not in the bulk data set
13F-HR 0001801265-20-000004 Quarter ended 2020-03-312020-05-15acceptance time not in the bulk data set
13F-HR 0001801265-20-000002 Quarter ended 2019-12-312020-02-14acceptance time not in the bulk data set