MA
Madison Avenue Partners, LP 13F Portfolio & Top Holdings (Q2 2026)
Madison Avenue Partners, LPCIK: 0001801265
Momentum followerQuality / disciplined sizingHigh-turnover trader
Total reported value
$2.3B
Reporting period: 2026-06-30 · Number of holdings: 25
Madison Avenue Partners, LP disclosed 25 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $2.3B and a quarterly turnover rate of 62.6%.
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Personality snowflake
- Concentration
- 28.3
- Portfolio Stability
- 62.61
- Momentum
- 100
- Sector conviction
- 47.44
- Diversification
- 50
- Sizing Uniformity
- 91.05
Madison Avenue Partners, LP's disclosed holdings carry a Herfindahl concentration index of 0.071 — mathematically equivalent to about 14 equally-sized positions, well below its 25 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.89), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 2.2 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Sector classification currently covers about 67% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim SNDK
-98.4% -$371.2M
New buy INVH
Sold out ICLR
Sold out MOH
Add STAA
+71.0% $74.1M
New buy G22845104
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | GHC | Graham Holdings Co-class B | Stock-Industrials | 12.11% | +0.81% | +0.22% | |
| 2 | INVH | Invitation Homes Inc | Stock-Real Estate | 10.84% | +10.84% | NEW | |
| 3 | MKL | Markel Group Inc | Stock-Financials | 9.44% | +2.12% | +27.80% | |
| 4 | CPNG | Coupang Inc | Stock-Consumer Disc | 9.31% | +1.62% | +33.04% | |
| 5 | MICC | The Magnum Ice Cream Company N. | Stock-Consumer Staples | 8.16% | +0.72% | -4.83% | |
| 6 | TBPH | Theravance Biopharma, Inc. | Stock-Other | 6.74% | +0.03% | -3.14% | |
| 7 | SOLV | Solventum CORP | Stock-Healthcare | 5.78% | +0.45% | -7.17% | |
| 8 | STAA | Staar Surgical Co | Stock-Other | 5.16% | +3.17% | +71.02% | |
| 9 | INDV | Indivior Pharmaceuticals Inc | Stock-Other | 5.08% | -0.64% | -33.39% | |
| 10 | LKFT | Lakefront Biotherapeutic-adr | Stock-Other | 4.45% | +1.23% | +39.86% | |
| 11 | GMED | Globus Medical Inc - A | Stock-Healthcare | 3.18% | +0.49% | +30.35% | |
| 12 | ✓ | Stock-Other | 2.96% | +2.96% | NEW | ||
| 13 | BTI | British American Tob-sp Adr | Stock-Consumer Staples | 2.77% | -0.09% | -7.16% | |
| 14 | STGW | Stagwell Inc | Stock-Other | 2.56% | +0.37% | — | |
| 15 | SANM | Sanmina CORP | Stock-Tech | 2.05% | +2.05% | NEW | |
| 16 | PRIM | Primoris Services CORP | Stock-Industrials | 1.97% | +1.97% | NEW | |
| 17 | AD | Array Digital Infrastructure | Stock-Other | 1.73% | +1.73% | NEW | |
| 18 | AIV | Apartment Invt & Mgmt Co -a | Stock-Other | 1.58% | -0.61% | — | |
| 19 | SNDK | Sandisk CORP | Stock-Tech | 0.95% | -16.15% | -98.43% | |
| 20 | TPB | Turning Point Brands Inc | Stock-Other | 0.90% | -0.03% | +0.04% | |
| 21 | SBGI | Sinclair Inc | Stock-Other | 0.85% | +0.02% | -6.11% | |
| 22 | MAGN | Magnera CORP | Stock-Other | 0.66% | — | -18.14% | |
| 23 | MRP | Millrose Properties | Stock-Real Estate | 0.39% | +0.39% | NEW | |
| 24 | KROS | Keros Therapeutics Inc | Stock-Other | 0.29% | -0.01% | — | |
| 25 | MNRO | Monro Inc | Stock-Other | 0.07% | +0.07% | NEW |
Portfolio Performance
Performance for Q3 2026
+1%
Performance Last 4 Quarters
+224%
- Stdev
- +36%
- Beta
- +1.4
- Alpha
- +37.2%
- Max Drawdown
- -18.8%
- Annualized Perf
- +78.6%
- Batting Avg vs S&P
- +75%
- Sortino
- +4.88
- Stutzer
- +0.56
- Treynor
- +0.47
- Sterling
- +3.57
- Calmar
- +4.19
- Information Ratio
- +1.44
- Tracking Error
- +31.5%
- Stdev Down
- +13.4%
- Winning Months %
- +69.4%
- Losing Months %
- +30.6%
- Best 12 Months
- +321.5%
- Worst 12 Months
- +9.9%
- Efficiency Ratio
- +1.54
- Sharpe
- +1.81
- Stdev Sectors
- +4.7%
- Skewness
- +0.59
- Kurtosis
- +0.86
- Upside Potential
- +6.25
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 25 | $2.3B | 63 | ||
| 2026 Q1 | 27 | $2.3B | 53 | ||
| 2025 Q4 | 23 | $2.3B | 65 | ||
| 2025 Q3 | 20 | $1.7B | 75 | ||
| 2025 Q2 | 26 | $1.5B | 0 | ||
| 2025 Q1 | 22 | $1.2B | 100 | ||
| 2024 Q4 | 15 | $944.4M | 0 | ||
| 2024 Q3 | 25 | $1.1B | 0 | ||
| 2024 Q2 | 20 | $791.6M | 0 | ||
| 2024 Q1 | 18 | $619.9M | 0 | ||
| 2023 Q4 | 19 | $708.3M | 0 | ||
| 2023 Q3 | 20 | $704.7M | 0 | ||
| 2023 Q2 | 19 | $458.3M | 0 | ||
| 2023 Q1 | 18 | $464.9M | 0 | ||
| 2022 Q4 | 22 | $564.5M | 0 | ||
| 2022 Q3 | 18 | $466.1M | 0 | ||
| 2022 Q2 | 16 | $488.8M | 0 | ||
| 2022 Q1 | 18 | $535.6M | 0 | ||
| 2021 Q4 | 16 | $461.9M | 0 | ||
| 2021 Q3 | 17 | $451.3M | 0 | ||
| 2021 Q2 | 14 | $334.8M | 99 | ||
| 2021 Q1 | 14 | $326.4M | 47 | ||
| 2020 Q4 | 12 | $274.9M | 79 | ||
| 2020 Q3 | 16 | $278.8M | 33 | ||
| 2020 Q2 | 18 | $253.6M | 74 | ||
| 2020 Q1 | 18 | $201.7M | 100 | ||
| 2019 Q4 | 15 | $115.9M | 0 |
💡
Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Holding changes this quarter
Madison Avenue Partners, LP's most significant position changes for 2026-06-30: New buy: Invitation Homes Inc (INVH); Sold out: ICON Public Limited Company (ICLR); Sold out: Molina Healthcare Inc (MOH); New buy: ; New buy: Sanmina CORP (SANM).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | INVH | Invitation Homes Inc | +10.8% | NEW | New buy |
| 2 | STAA | Staar Surgical Co | +3.2% | +71.02% | Add |
| 3 | ✓ | +3% | NEW | New buy | |
| 4 | MKL | Markel Group Inc | +2.1% | +27.80% | Add |
| 5 | SANM | Sanmina CORP | +2.1% | NEW | New buy |
| 6 | PRIM | Primoris Services CORP | +2% | NEW | New buy |
| 7 | AD | Array Digital Infrastructure | +1.7% | NEW | New buy |
| 8 | CPNG | Coupang Inc | +1.6% | +33.04% | Add |
| 9 | LKFT | Lakefront Biotherapeutic-adr | +1.2% | +39.86% | Add |
| 10 | GHC | Graham Holdings Co-class B | +0.8% | +0.22% | Add |
| 11 | MICC | The Magnum Ice Cream Company N. | +0.7% | -4.83% | Trim |
| 12 | GMED | Globus Medical Inc - A | +0.5% | +30.35% | Add |
| 13 | SOLV | Solventum CORP | +0.5% | -7.17% | Trim |
| 14 | MRP | Millrose Properties | +0.4% | NEW | New buy |
| 15 | STGW | Stagwell Inc | +0.4% | — | Unchanged |
| 16 | MNRO | Monro Inc | +0.1% | NEW | New buy |
| 17 | TBPH | Theravance Biopharma, Inc. | 0% | -3.14% | Trim |
| 18 | SBGI | Sinclair Inc | 0% | -6.11% | Trim |
| 19 | MAGN | Magnera CORP | — | -18.14% | Trim |
| 20 | KROS | Keros Therapeutics Inc | 0% | — | Unchanged |
| 21 | FSP | Franklin Street Properties C | 0% | EXIT | Sold out |
| 22 | SN | SharkNinja, Inc. | 0% | EXIT | Sold out |
| 23 | TPB | Turning Point Brands Inc | 0% | +0.04% | Add |
| 24 | BTI | British American Tob-sp Adr | -0.1% | -7.16% | Trim |
| 25 | PAR | Par Technology Corp/del | -0.3% | EXIT | Sold out |
| 26 | CBC | Central Bancompany | -0.5% | EXIT | Sold out |
| 27 | AIV | Apartment Invt & Mgmt Co -a | -0.6% | — | Unchanged |
| 28 | INDV | Indivior Pharmaceuticals Inc | -0.6% | -33.39% | Trim |
| 29 | DNOW | Dnow Inc | -0.7% | EXIT | Sold out |
| 30 | PRMB | Primo Brands CORP | -1.1% | EXIT | Sold out |
| 31 | WLY | Wiley (john) & Sons-class A | -1.1% | EXIT | Sold out |
| 32 | MOH | Molina Healthcare Inc | -3.7% | EXIT | Sold out |
| 33 | ICLR | ICON Public Limited Company | -6.2% | EXIT | Sold out |
| 34 | SNDK | Sandisk CORP | -16.2% | -98.43% | Trim |
Filing History
FAQ
What is Madison Avenue Partners, LP and what type of investor is it?
Madison Avenue Partners, LP is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $2.3B, spread across 25 disclosed positions.
What are Madison Avenue Partners, LP's largest equity positions?
Based on the latest 13F filing, Madison Avenue Partners, LP's top holdings by market value are:
1. Graham Holdings Co-class B (GHC) — $281.2M (12.1%)
2. Invitation Homes Inc (INVH) — $251.8M (10.8%)
3. Markel Group Inc (MKL) — $219.4M (9.4%)
4. Coupang Inc (CPNG) — $216.4M (9.3%)
5. The Magnum Ice Cream Company N. (MICC) — $189.6M (8.2%)
What changes did Madison Avenue Partners, LP make in its most recent portfolio filing?
In the latest reported quarter, Madison Avenue Partners, LP made 31 notable position adjustments: 7 new positions were initiated, 7 existing holdings were added to, 8 positions were partially reduced, and 9 were completely exited. The largest of these moves: New buy: Invitation Homes Inc (INVH); Sold out: ICON Public Limited Company (ICLR); Sold out: Molina Healthcare Inc (MOH); New buy: ; New buy: Sanmina CORP (SANM)
What sectors does Madison Avenue Partners, LP focus on?
Madison Avenue Partners, LP is concentrated in the following sectors based on its current disclosed equity portfolio:
• Industrials: 21.0%
• Real Estate: 16.8%
• Consumer Staples: 16.3%
• Financials: 14.1%
• Consumer Discretionary: 13.9%
• Health Care: 13.4%
Investment Profile
Madison Avenue Partners, LP returned an annualized 78.6% over the trailing 36 months — outperforming the S&P 500 by 37.2 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.40 (more volatile than the market) and a 75% quarterly batting average against the index.
Its portfolio is broadly diversified and fast-trading.
Its turnover score has risen from 0 to 63 over the past 4 quarters — a shift toward more active trading.
It has added to its MICC position over the past two quarters (+$87.7M, now $189.6M), while trimming INDV over the same stretch (-$107.4M, still holding $117.9M).
Peer Institutions
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CW
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SW
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Developer Access
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