DC
Diameter Capital Partners LP 13F Disclosure (Q2 2026) — Portfolio & Holdings
Diameter Capital Partners LPCIK: 0001727012
High-turnover traderContrarianSector-focused
Total reported value
$1.2B
Reporting period: 2026-06-30 · Number of holdings: 34
Diameter Capital Partners LP disclosed 34 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $1.2B and a quarterly turnover rate of 112.9%.
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Personality snowflake
- Concentration
- 48.84
- Portfolio Stability
- 100
- Momentum
- 0
- Sector conviction
- 87.2
- Diversification
- 66
- Sizing Uniformity
- 82.33
Diameter Capital Partners LP's disclosed holdings carry a Herfindahl concentration index of 0.122 — mathematically equivalent to about 8 equally-sized positions, well below its 34 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.77), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 23% 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.govNew buy IAU
Trim ECHO
-76.9% -$139.3M
New buy 778920AC2
Sold out IWM
Trim SPY
-20.0% -$26.5M
New buy TDS
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 33 holdings (of 34 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 24.09% | -6.35% | -20.00% | |
| 2 | IAU | Ishares Gold Trust | ETF-Commodities | 20.48% | +20.48% | NEW | |
| 3 | ✓ | Stock-Other | 10.22% | +10.22% | NEW | ||
| 4 | TDS | Telephone And Data Systems | Stock-Comm Services | 5.00% | +5.00% | NEW | |
| 5 | MBC | Masterbrand Inc | Stock-Consumer Disc | 3.97% | +2.77% | +209.23% | |
| 6 | UNIT | Uniti Group Inc | Stock-Other | 3.70% | -1.29% | -29.60% | |
| 7 | ✓ | Stock-Other | 3.44% | +3.44% | NEW | ||
| 8 | FBIN | Fortune Brands Innovations I | Stock-Industrials | 3.08% | +0.60% | +2.40% | |
| 9 | ECHO | Echostar Corp-a | Stock-Comm Services | 2.81% | -13.49% | -76.89% | |
| 10 | JHX | James Hardie Industries plc | Stock-Other | 2.47% | +2.38% | +2244.22% | |
| 11 | ✓ | Stock-Other | 2.39% | +2.39% | NEW | ||
| 12 | AMBP | Ardagh Metal Packaging S.A. | Stock-Other | 1.92% | +0.23% | +12.60% | |
| 13 | VISN | Vistance Networks Inc | Stock-Tech | 1.80% | +0.44% | +118.75% | |
| 14 | CMCSA | Comcast Corp-class A | Stock-Comm Services | 1.66% | +1.66% | NEW | |
| 15 | OVV | Ovintiv Inc | Stock-Energy | 1.66% | +1.66% | NEW | |
| 16 | ✓ | Stock-Other | 1.18% | +1.18% | NEW | ||
| 17 | MAGN | Magnera CORP | Stock-Other | 1.14% | +0.07% | — | |
| 18 | SILA | Sila Realty Trust Inc | Stock-Other | 1.07% | -1.26% | -58.35% | |
| 19 | SEI | Solaris Energy Infrastructur | Stock-Energy | 0.97% | +0.97% | NEW | |
| 20 | CMCO | Columbus Mckinnon Corp/ny | Stock-Other | 0.87% | -0.10% | — | |
| 21 | CHTR | Charter Communications Inc-a | Stock-Comm Services | 0.86% | +0.86% | NEW | |
| 22 | ✓ | Stock-Other | 0.72% | +0.72% | NEW | ||
| 23 | ✓ | Stock-Other | 0.62% | +0.62% | NEW | ||
| 24 | NCDL | Nuveen Churchill Direct Lend | Stock-Other | 0.61% | -1.03% | -56.16% | |
| 25 | WING | Wingstop Inc | Stock-Consumer Disc | 0.56% | +0.56% | NEW | |
| 26 | PFLT | Pennantpark Floating Rate Ca | Stock-Other | 0.54% | -0.71% | -45.63% | |
| 27 | CYH | Community Health Systems Inc | Stock-Other | 0.49% | +0.50% | NEW | |
| 28 | CGBD | Carlyle Secured Lending Inc | Stock-Other | 0.43% | +0.43% | NEW | |
| 29 | EAT | Brinker International Inc | Stock-Consumer Disc | 0.40% | +0.40% | NEW | |
| 30 | FWRD | Forward Air CORP | Stock-Other | 0.38% | +0.38% | NEW | |
| 31 | MWH | Solv Energy Inc-cl A | Stock-Other | 0.22% | +0.22% | NEW | |
| 32 | ✓ | Stock-Other | 0.16% | +0.16% | NEW | ||
| 33 | BBDC | Barings Bdc Inc | Stock-Other | 0.07% | -1.06% | -93.44% |
Portfolio Performance
Performance for Q3 2026
-5.1%
Performance Last 4 Quarters
+40.5%
- Stdev
- +27.9%
- Beta
- +1.15
- Alpha
- +2.7%
- Max Drawdown
- -21.3%
- Annualized Perf
- +24.7%
- Batting Avg vs S&P
- +41.7%
- Sortino
- +2.12
- Stutzer
- +0.28
- Treynor
- +0.22
- Sterling
- +1.02
- Calmar
- +1.16
- Information Ratio
- +0.25
- Tracking Error
- +23.7%
- Stdev Down
- +12.2%
- Winning Months %
- +58.3%
- Losing Months %
- +41.7%
- Best 12 Months
- +125.4%
- Worst 12 Months
- -7.6%
- Efficiency Ratio
- +0.43
- Sharpe
- +0.92
- Stdev Sectors
- +13.5%
- Skewness
- +0.84
- Kurtosis
- +0.13
- Upside Potential
- +4.03
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 34 | $1.2B | 100 | ||
| 2026 Q1 | 29 | $1.1B | 100 | ||
| 2025 Q4 | 40 | $1.1B | 100 | ||
| 2025 Q3 | 41 | $1.6B | 100 | ||
| 2025 Q2 | 26 | $876.0M | 0 | ||
| 2025 Q1 | 23 | $857.7M | 100 | ||
| 2024 Q4 | 29 | $677.6M | 0 | ||
| 2024 Q3 | 25 | $1.2B | 0 | ||
| 2024 Q2 | 23 | $848.6M | 0 | ||
| 2024 Q1 | 20 | $973.3M | 0 | ||
| 2023 Q4 | 20 | $829.1M | 0 | ||
| 2023 Q3 | 23 | $455.5M | 0 | ||
| 2023 Q2 | 23 | $1.1B | 0 | ||
| 2023 Q1 | 18 | $597.5M | 0 | ||
| 2022 Q4 | 26 | $643.7M | 0 | ||
| 2022 Q3 | 26 | $771.2M | 0 | ||
| 2022 Q2 | 34 | $2.0B | 0 | ||
| 2022 Q1 | 58 | $2.1B | 0 | ||
| 2021 Q4 | 162 | $1.7B | 0 | ||
| 2021 Q3 | 123 | $1.1B | 0 | ||
| 2021 Q2 | 127 | $1.5B | 100 | ||
| 2021 Q1 | 96 | $951.3M | 100 | ||
| 2020 Q4 | 29 | $939.9M | 100 | ||
| 2020 Q3 | 22 | $1.4B | 100 | ||
| 2020 Q2 | 23 | $1.1B | 100 | ||
| 2020 Q1 | 14 | $296.0M | 100 | ||
| 2019 Q4 | 20 | $1.0B | 100 | ||
| 2019 Q3 | 18 | $283.0M | 90 | ||
| 2019 Q2 | 17 | $490.9M | 100 | ||
| 2019 Q1 | 16 | $285.9M | 100 | ||
| 2018 Q4 | 18 | $219.3M | 100 | ||
| 2018 Q3 | 24 | $958.6M | 72 | ||
| 2018 Q2 | 19 | $1.0B | 100 | ||
| 2018 Q1 | 18 | $464.3M | 100 | ||
| 2017 Q4 | 15 | $222.6M | 0 |
Holding changes this quarter
Diameter Capital Partners LP's most significant position changes for 2026-06-30: New buy: Ishares Gold Trust (IAU); New buy: ; Sold out: Ishares Russell 2000 ETF (IWM); New buy: Telephone And Data Systems (TDS); New buy: .
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | IAU | Ishares Gold Trust | +20.5% | NEW | New buy |
| 2 | ✓ | +10.2% | NEW | New buy | |
| 3 | TDS | Telephone And Data Systems | +5% | NEW | New buy |
| 4 | ✓ | +3.4% | NEW | New buy | |
| 5 | MBC | Masterbrand Inc | +2.8% | +209.23% | Add |
| 6 | ✓ | +2.4% | NEW | New buy | |
| 7 | JHX | James Hardie Industries plc | +2.4% | +2244.22% | Add |
| 8 | CMCSA | Comcast Corp-class A | +1.7% | NEW | New buy |
| 9 | OVV | Ovintiv Inc | +1.7% | NEW | New buy |
| 10 | ✓ | +1.2% | NEW | New buy | |
| 11 | SEI | Solaris Energy Infrastructur | +1% | NEW | New buy |
| 12 | CHTR | Charter Communications Inc-a | +0.9% | NEW | New buy |
| 13 | ✓ | +0.7% | NEW | New buy | |
| 14 | ✓ | +0.6% | NEW | New buy | |
| 15 | FBIN | Fortune Brands Innovations I | +0.6% | +2.40% | Add |
| 16 | WING | Wingstop Inc | +0.6% | NEW | New buy |
| 17 | CYH | Community Health Systems Inc | +0.5% | NEW | New buy |
| 18 | VISN | Vistance Networks Inc | +0.4% | +118.75% | Add |
| 19 | CGBD | Carlyle Secured Lending Inc | +0.4% | NEW | New buy |
| 20 | EAT | Brinker International Inc | +0.4% | NEW | New buy |
| 21 | FWRD | Forward Air CORP | +0.4% | NEW | New buy |
| 22 | AMBP | Ardagh Metal Packaging S.A. | +0.2% | +12.60% | Add |
| 23 | MWH | Solv Energy Inc-cl A | +0.2% | NEW | New buy |
| 24 | ✓ | +0.2% | NEW | New buy | |
| 25 | MAGN | Magnera CORP | +0.1% | — | Unchanged |
| 26 | LINTA 3.75 02-15-30Bond | Liberty Interactive LLC | 0% | EXIT | Sold out |
| 27 | CMCO | Columbus Mckinnon Corp/ny | -0.1% | — | Unchanged |
| 28 | RH | Rh | -0.4% | EXIT | Sold out |
| 29 | GOOGL | Alphabet Inc-cl A | -0.7% | EXIT | Sold out |
| 30 | PFLT | Pennantpark Floating Rate Ca | -0.7% | -45.63% | Trim |
| 31 | NCDL | Nuveen Churchill Direct Lend | -1% | -56.16% | Trim |
| 32 | BBDC | Barings Bdc Inc | -1.1% | -93.44% | Trim |
| 33 | SLRC | Slr Investment CORP | -1.1% | EXIT | Sold out |
| 34 | SILA | Sila Realty Trust Inc | -1.3% | -58.35% | Trim |
| 35 | UNIT | Uniti Group Inc | -1.3% | -29.60% | Trim |
| 36 | XLI | Ss Industrial Select Sector | -1.9% | EXIT | Sold out |
| 37 | ARKK | Ark Innovation ETF | -1.9% | EXIT | Sold out |
| 38 | PCG | P G & E CORP | -2% | EXIT | Sold out |
| 39 | UWMC | Uwm Holdings CORP | -2% | EXIT | Sold out |
| 40 | HCA | Hca Healthcare Inc | -2.1% | EXIT | Sold out |
| 41 | CZR | Caesars Entertainment Inc | -2.3% | EXIT | Sold out |
| 42 | BKNG | Booking Holdings Inc | -2.4% | EXIT | Sold out |
| 43 | NBIS 2.625 03-15-33 .Bond | Nebius Group NV | -3.5% | EXIT | Sold out |
| 44 | NBIS 1.25 03-15-31Bond | Nebius Group NV | -3.6% | EXIT | Sold out |
| 45 | SPY | Ss Spdr S&p 500 ETF Trust-us | -6.4% | -20.00% | Trim |
| 46 | IWM | Ishares Russell 2000 ETF | -9.3% | EXIT | Sold out |
| 47 | ECHO | Echostar Corp-a | -13.5% | -76.89% | Trim |
Filing History
FAQ
What is Diameter Capital Partners LP and what type of investor is it?
Diameter Capital 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 $1.2B, spread across 34 disclosed positions.
What are Diameter Capital Partners LP's largest equity positions?
Based on the latest 13F filing, Diameter Capital Partners LP's top holdings by market value are:
1. Ss Spdr S&p 500 ETF Trust-us (SPY) — $298.7M (24.1%)
2. Ishares Gold Trust (IAU) — $254.0M (20.5%)
3. — $126.7M (10.2%)
4. Telephone And Data Systems (TDS) — $62.0M (5.0%)
5. Masterbrand Inc (MBC) — $49.2M (4.0%)
What changes did Diameter Capital Partners LP make in its most recent portfolio filing?
In the latest reported quarter, Diameter Capital Partners LP made 45 notable position adjustments: 19 new positions were initiated, 5 existing holdings were added to, 7 positions were partially reduced, and 14 were completely exited. The largest of these moves: New buy: Ishares Gold Trust (IAU); New buy: ; Sold out: Ishares Russell 2000 ETF (IWM); New buy: Telephone And Data Systems (TDS); New buy:
What sectors does Diameter Capital Partners LP focus on?
Diameter Capital Partners LP is concentrated in the following sectors based on its current disclosed equity portfolio:
• Communication Services: 45.4%
• Consumer Discretionary: 21.6%
• Industrials: 13.5%
• Energy: 11.5%
• Information Technology: 7.9%
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Investment Profile
Diameter Capital Partners LP returned an annualized 24.7% over the trailing 36 months — outperforming the S&P 500 by 2.7 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.15 (more volatile than the market) and a 42% quarterly batting average against the index.
Its portfolio is moderately concentrated and fast-trading, with 45.4% of the portfolio concentrated in Communication Services.
Its turnover score has risen from 0 to 100 over the past 4 quarters — a shift toward more active trading.
It has trimmed its ECHO position for two straight quarters, cutting it by $374.7M while still holding $34.9M.
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Developer Access
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