Madison Avenue Partners, LP — 13F Holdings & Portfolio
CIK 1801265 · latest 13F-HR filed 2026-05-15
Madison Avenue Partners, LP manages $2.30B in 13F-reported U.S. long-equity assets across 27 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are SNDK (17.10%), GHC (11.30%), CPNG (7.69%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 7 new positions, exited 3, added to 4, and trimmed 14.
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.
$2.30B
Long-equity book
27
Distinct positions
2026-03-31
Filed 2026-05-15
+7 / −3 / ↑4 / ↓14
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- MAGNUM ICE CREAM CO NV$69.2M +67.9%
- SANDISK CORP$52.8M +15.5%
- STAGWELL INC$11.2M +28.6%
- SINCLAIR INC$5.1M +37.0%
Top Trims
- GLOBUS MED INC-$167.3M -73.0%
- INDIVIOR PLC-$93.8M -41.6%
- SOLVENTUM CORP-$35.0M -22.2%
- MOLINA HEALTHCARE INC-$25.5M -23.2%
- THERAVANCE BIOPHARMA INC-$23.6M -13.3%
New Positions
- COUPANG INC$176.8M
- ICON PLC$142.0M
- APARTMENT INVT & MGMT CO$50.4M
- STAAR SURGICAL CO$45.7M
- PRIMO BRANDS CORPORATION$24.9M
Exited Positions
- SOLSTICE ADVANCED MATLS INC$135.2M
- UNIFIRST CORP MASS$58.6M
- WORKIVA INC$5.2M
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 | SANDISK CORP | SNDK | 80004C200 | $393.3M | 17.10% | 619,010 | SH |
| 2 | GRAHAM HLDGS CO | GHC | 384637104 | $259.9M | 11.30% | 245,829 | SH |
| 3 | COUPANG INC | CPNG | 22266T109 | $176.8M | 7.69% | 9,363,621 | SH |
| 4 | MAGNUM ICE CREAM CO NV | MICC | N5505D105 | $171.1M | 7.44% | 11,445,529 | SH |
| 5 | MARKEL GROUP INC | MKL | 570535104 | $168.2M | 7.32% | 87,889 | SH |
| 6 | THERAVANCE BIOPHARMA INC | TBPH | G8807B106 | $154.4M | 6.71% | 9,511,150 | SH |
| 7 | ICON PLC | ICLR | G4705A100 | $142.0M | 6.17% | 1,282,838 | SH |
| 8 | INDIVIOR PLC | INDV | 45579U109 | $131.5M | 5.72% | 4,315,162 | SH |
| 9 | SOLVENTUM CORP | SOLV | 83444M101 | $122.5M | 5.33% | 1,875,736 | SH |
| 10 | MOLINA HEALTHCARE INC | MOH | 60855R100 | $84.5M | 3.67% | 633,877 | SH |
| 11 | GALAPAGOS NV | GLPG | 36315X101 | $74.0M | 3.22% | 2,465,179 | SH |
| 12 | BRITISH AMERN TOB PLC | BTI | 110448107 | $65.7M | 2.86% | 1,123,767 | SH |
| 13 | GLOBUS MED INC | GMED | 379577208 | $61.8M | 2.69% | 717,476 | SH |
| 14 | STAGWELL INC | STGW | 85256A109 | $50.4M | 2.19% | 8,014,322 | SH |
| 15 | APARTMENT INVT & MGMT CO | AIV | 03748R747 | $50.4M | 2.19% | 12,374,991 | SH |
| 16 | STAAR SURGICAL CO | STAA | 852312305 | $45.7M | 1.99% | 2,441,678 | SH |
| 17 | WILEY JOHN & SONS INC | WLY | 968223206 | $25.8M | 1.12% | 678,417 | SH |
| 18 | PRIMO BRANDS CORPORATION | PRMB | 741623102 | $24.9M | 1.08% | 1,321,942 | SH |
| 19 | TURNING PT BRANDS INC | TPB | 90041L105 | $21.5M | 0.93% | 247,723 | SH |
| 20 | SINCLAIR INC | SBGI | 829242106 | $19.1M | 0.83% | 1,473,484 | SH |
| 21 | DNOW INC | DNOW | 67011P100 | $16.3M | 0.71% | 1,365,067 | SH |
| 22 | MAGNERA CORP | MAGN | 55939A107 | $15.1M | 0.66% | 1,590,616 | SH |
| 23 | CENTRAL BANCOMPANY | CBC | 152413100 | $10.7M | 0.46% | 444,933 | SH |
| 24 | KEROS THERAPEUTICS INC | KROS | 492327101 | $6.9M | 0.30% | 626,583 | SH |
| 25 | PAR TECHNOLOGY CORP | PAR | 698884103 | $6.0M | 0.26% | 447,878 | SH |
| 26 | FRANKLIN STR PPTYS CORP | FSP | 35471R106 | $717.7K | 0.03% | 1,080,132 | SH |
| 27 | SHARKNINJA INC | SN | G8068L108 | $651.5K | 0.03% | 6,152 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 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 |