Madison Avenue Partners, LP — 13F Holdings & Portfolio
CIK 1801265 · latest 13F-HR filed 2026-08-14
Madison Avenue Partners, LP manages $2.32B in 13F-reported U.S. long-equity assets across 25 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are GHC (12.11%), INVH (10.84%), MKL (9.44%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 7 new positions and exited 9; 9 existing positions rose in reported value and 3 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-08-14
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q2 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q1 26 → Q2 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 77.1%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Mar 2, 2026.
14TH FL
NEW YORK, NY 10155
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| Carroll, Christopher, Adien Control | CFO / CCO since Jul 2018 | Less than 5% | Individual |
| EMAI MANAGEMENT, LLC Control | GENERAL PARTNER since Apr 2018 | Less than 5% | Domestic Entity |
| Samaha, Eli, Jackson Control | MANAGING PARTNER since Apr 2018 | 75% or more | Individual |
| Samaha, Eli, Jackson Control Indirect owner via EMAI MANAGEMENT, LLC | OWNER/MANAGING MEMBER since Apr 2018 | 75% or more | Individual |
Ownership & leadership changes · 2 filings with changes since Nov 1, 2018
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- ChangedCarroll, Christopher, Adien · title CCO / CFO / CFO / CCO → CFO / CCO
- ChangedCarroll, Christopher, Adien · title CFO / CCO → CCO / CFO / CFO / CCO
- ListedCarroll, Christopher, Adien · CFO / CCO · Less than 5% · control person
- ListedEMAI MANAGEMENT, LLC · GENERAL PARTNER · Less than 5% · control person
- ListedSamaha, Eli, Jackson · MANAGING PARTNER · 75% or more · control person
- ListedSamaha, Eli, Jackson · OWNER/MANAGING MEMBER · 75% or more · indirect via EMAI MANAGEMENT, LLC · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- STAAR SURGICAL CO$74.1M +162.4%
- MARKEL GROUP INC$51.1M +30.4%
- COUPANG INC$39.6M +22.4%
- LAKEFRONT BIOTHERAPEUTICS NV$29.4M +39.8%
- GRAHAM HLDGS CO$21.3M +8.2%
Top Trims
- SANDISK CORP-$371.2M -94.4%
- APARTMENT INVT & MGMT CO-$13.6M -27.0%
- INDIVIOR PLC-$13.6M -10.3%
New Positions
- INVITATION HOMES INC$251.8M
- OCTAVE INTELLIGENCE PLC$68.8M
- SANMINA CORP$47.7M
- PRIMORIS SVCS CORP$45.8M
- ARRAY DIGITAL INFRASTRUCTURE$40.2M
Exited Positions
- ICON PLC$142.0M
- MOLINA HEALTHCARE INC$84.5M
- WILEY JOHN & SONS INC$25.8M
- PRIMO BRANDS CORPORATION$24.9M
- DNOW INC$16.3M
Madison Avenue Partners, LP Holdings (2026-06-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | GRAHAM HLDGS CO | GHC | 384637104 | $281.2M | 12.11% | 246,368 | SH |
| 2 | INVITATION HOMES INC | INVH | 46187W107 | $251.8M | 10.84% | 8,335,309 | SH |
| 3 | MARKEL GROUP INC | MKL | 570535104 | $219.4M | 9.44% | 112,325 | SH |
| 4 | COUPANG INC | CPNG | 22266T109 | $216.4M | 9.31% | 12,457,195 | SH |
| 5 | MAGNUM ICE CREAM CO NV | MICC | N5505D105 | $189.6M | 8.16% | 10,892,592 | SH |
| 6 | THERAVANCE BIOPHARMA INC | TBPH | G8807B106 | $156.6M | 6.74% | 9,212,252 | SH |
| 7 | SOLVENTUM CORP | SOLV | 83444M101 | $134.3M | 5.78% | 1,741,221 | SH |
| 8 | STAAR SURGICAL CO | STAA | 852312305 | $119.8M | 5.16% | 4,175,748 | SH |
| 9 | INDIVIOR PLC | INDV | 45579U109 | $117.9M | 5.08% | 2,874,368 | SH |
| 10 | LAKEFRONT BIOTHERAPEUTICS NV | LKFT | 36315X101 | $103.4M | 4.45% | 3,447,807 | SH |
| 11 | GLOBUS MED INC | GMED | 379577208 | $73.9M | 3.18% | 935,216 | SH |
| 12 | OCTAVE INTELLIGENCE PLC | OCTV | G22845104 | $68.8M | 2.96% | 4,222,663 | SH |
| 13 | BRITISH AMERN TOB PLC | BTI | 110448107 | $64.4M | 2.77% | 1,043,302 | SH |
| 14 | STAGWELL INC | STGW | 85256A109 | $59.5M | 2.56% | 8,014,322 | SH |
| 15 | SANMINA CORP | SANM | 801056102 | $47.7M | 2.05% | 188,322 | SH |
| 16 | PRIMORIS SVCS CORP | PRIM | 74164F103 | $45.8M | 1.97% | 462,058 | SH |
| 17 | ARRAY DIGITAL INFRASTRUCTURE | AD | 911684108 | $40.2M | 1.73% | 1,109,463 | SH |
| 18 | APARTMENT INVT & MGMT CO | AIV | 03748R747 | $36.8M | 1.58% | 12,374,991 | SH |
| 19 | SANDISK CORP | SNDK | 80004C200 | $22.1M | 0.95% | 9,698 | SH |
| 20 | TURNING PT BRANDS INC | TPB | 90041L105 | $21.0M | 0.90% | 247,823 | SH |
| 21 | SINCLAIR INC | SBGI | 829242106 | $19.7M | 0.85% | 1,383,470 | SH |
| 22 | MAGNERA CORP | MAGN | 55939A107 | $15.3M | 0.66% | 1,302,066 | SH |
| 23 | MILLROSE PPRYS INC | MRP | 601137102 | $9.0M | 0.39% | 298,461 | SH |
| 24 | KEROS THERAPEUTICS INC | KROS | 492327101 | $6.7M | 0.29% | 626,583 | SH |
| 25 | MONRO INC | MNRO | 610236101 | $1.6M | 0.07% | 95,966 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $2.32B | 25 | 0001801265-26-000005 |
| 2026-03-31 | 2026-05-15 | $2.30B | 27 | 0001801265-26-000003 |
| 2025-12-31 | 2026-02-17 | $2.33B | 23 | 0001801265-26-000002 |
| 2025-09-30 | 2025-11-14 | $1.68B | 20 | 0001801265-25-000008 |
14TH FLOOR
NEW YORK, NY 10155