Madison Avenue Partners portfolio
Concentrated managerInvestment firmPortfolio as of Jun 30, 2026 (Q2 2026) · filed with the SEC on Aug 14, 2026 · data updated on Nov 5, 2026 · Q2 2026 13F (filing) ↗ · all its 13F filings ↗
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Madison Avenue Partners reported a $2.3 bn portfolio of 25 positions to the SEC as of the end of Q2 2026. Its largest positions are GHC, INVH, MKL. During the quarter it opened Invitation Homes and Sanmina and exited Icon and Molina Healthcare.
Sections with a free account
What it reported after the quarter end (Q2 2026)
The 13F shows the portfolio as of Jun 30, 2026. Since then Madison Avenue Partners has filed these own trades with the SEC (Form 4, when it owns more than 10% of a company or holds a role in it) and stakes above 5% (13D and 13G). It is not everything it did: only what it must report before the next 13F.
Stake reported in the company · event of Oct 13, 2026 · filed Oct 20, 2026 · filing ↗
Stake reported in the company · event of Jun 30, 2026 · filed Aug 14, 2026 · filing ↗
- 13G/ATheravance BiopharmaTBPH17.7 %
Stake reported in the company · event of Jun 30, 2026 · filed Aug 14, 2026 · filing ↗
- 13G/ASTAAR SurgicalSTAA5.8 % → 8.4 %
Stake reported in the company · event of Jun 30, 2026 · filed Aug 14, 2026 · filing ↗
What changed this quarter
28 positions with a change (6 new, 5 added to, 8 trimmed, 9 sold); also, 1 entered through an IPO. 12 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- Newly listedOctave IntelligenceOCTV3.0% of the portfolio
It started trading this quarter: it appears in a 13F for the first time. The filing does not say whether the manager already held it before the listing, so it is not counted as a purchase.
- Sandisk−98%fewer sharesReduced17.1% → 0.9%
- Invitation Homes+10.8 ppof portfolioNew— → 10.8%
- Icon−6.1 ppof portfolioSold out6.2% → —
- Molina Healthcare−3.6 ppof portfolioSold out3.7% → —
- Indivior Pharmaceuticals−33%fewer sharesReduced5.7% → 5.1%
- Coupang+33%more sharesIncreased7.7% → 9.3%
- STAAR Surgical+71%more sharesIncreased2.0% → 5.2%
- Markel Group+28%more sharesIncreased7.3% → 9.4%
- Sanmina+2.1 ppof portfolioNew— → 2.1%
- Primoris Services+2.0 ppof portfolioNew— → 2.0%
- Array Digital Infrastructure+1.7 ppof portfolioNew— → 1.7%
- Lakefront Biotherapeutics+40%more sharesIncreased3.2% → 4.4%
The figure on the right: for positions added to or trimmed, the change in the number of shares (%); for new and sold ones, the points of the portfolio moved (pp). Below, the portfolio weight before → after. Traded weight: what it bought or sold, excluding price effects.
Top holdings
- Graham HoldingsGHC12.1%
- Invitation HomesINVH10.8%
- Markel GroupMKL9.4%
- CoupangCPNG9.3%
- Magnum Ice CreamMICC8.2%
- Theravance BiopharmaTBPH6.7%
- SolventumSOLV5.8%
- STAAR SurgicalSTAA5.2%
- Indivior PharmaceuticalsINDV5.1%
- Lakefront BiotherapeuticsLKFT4.4%
- Globus MedicalGMED3.2%
- Octave IntelligenceOCTV3.0%
- British American Tobacco p.l.c.BTI2.8%
- StagwellSTGW2.6%
- SanminaSANM2.1%
“Since”: first quarter of the current run, unbroken until today. In the details, prices are the quarter-end prices of the quarters in which it added shares, per the 13F. The manager may have bought at any price within each quarter; the SEC only publishes the value at quarter end.
Portfolio by sector
- ● Health Care 31%
- ● Consumer Discretionary 21%
- ● Real Estate 13%
- ● Consumer Staples 12%
- ● Financials 9%
- ● Information Technology 6%
- ● Industrials 5%
- ● Communication Services 3%
- ● Materials 1%
How its portfolio changed (8 quarters)
Q2 2026: 25
Q2 2026: 77%
Q2 2026: 31.5%
Traded turnover: the weight it bought plus the weight it sold in the quarter, divided by two, excluding price moves. The plain “turnover” in the header does include that effect. With a free account: the full history and sectors over time.
Stakes above 5% (13D/13G)
Companies where this filer reported holding 5% or more of the shares. It is the figure from its latest filing on each one; history since December 2024.
How we classify it
Investment firm, per its Form ADV of Mar 2, 2026 (high confidence).
The data, as reported: MADISON AVENUE PARTNERS LP (CRD 298610): 7.B private funds: 1 hedge (gross assets $3.9 bn); 5.D assets by client type: pooled vehicles 100% (of $3.9 bn)
The type comes from a rule applied to that data. If it looks wrong, tell us.
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Same type of filer and a 13F portfolio value between a third and three times this one. It is not a comparison of what they hold.
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