AC
Attestor Capital Ltd — 13F Portfolio Report & Top Holdings (Q2 2026)
Attestor Capital LtdCIK: 0001830731
Concentrated strategySector-focusedLong-term holder
Total reported value
$350.1M
Reporting period: 2026-06-30 · Number of holdings: 5
Attestor Capital Ltd disclosed 5 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $350.1M and a quarterly turnover rate of 0.0%.
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Personality snowflake
- Concentration
- 100
- Portfolio Stability
- 0
- Momentum
- 50
- Sector conviction
- 100
- Diversification
- 8
- Sizing Uniformity
- 88.29
Attestor Capital Ltd's disclosed holdings carry a Herfindahl concentration index of 0.507 — mathematically equivalent to about 2 equally-sized positions, well below its 5 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 1.17), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd TLN
+22.4% $72.5M
Sold out GBTG
Trim ECHO
-11.0% -$31.0M
Sold out STX
Sold out WDC
New buy AMZN
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 4 holdings (of 5 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | TLN | Talen Energy CORP | Stock-Utilities | 64.48% | +24.11% | +22.41% | |
| 2 | ECHO | Echostar Corp-a | Stock-Comm Services | 29.98% | -5.85% | -10.97% | |
| 3 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 3.29% | +3.29% | NEW | |
| 4 | RXO | Rxo Inc | Stock-Other | 2.25% | +1.15% | — |
Portfolio Performance
Performance for Q3 2026
-19.7%
Performance Last 4 Quarters
+2.4%
- Stdev
- +40.8%
- Beta
- +1.57
- Alpha
- -27.4%
- Max Drawdown
- -19.7%
- Annualized Perf
- +4.8%
- Batting Avg vs S&P
- +50%
- Sortino
- +0.57
- Stutzer
- +0.09
- Treynor
- +0.07
- Sterling
- —
- Calmar
- +0.24
- Information Ratio
- -0.44
- Tracking Error
- +30.3%
- Stdev Down
- +19.9%
- Winning Months %
- +33.3%
- Losing Months %
- +66.7%
- Best 12 Months
- —
- Worst 12 Months
- —
- Efficiency Ratio
- +0.04
- Sharpe
- +0.28
- Stdev Sectors
- +25.6%
- Skewness
- +0.62
- Kurtosis
- -1.16
- Upside Potential
- +3.11
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
Holding changes this quarter
Attestor Capital Ltd's most significant position changes for 2026-06-30: Sold out: Global Business Travel Group (GBTG); Sold out: Seagate Technology Holdings plc (STX); Sold out: Western Digital CORP (WDC); New buy: Amazon.com Inc (AMZN); Sold out: Vanguard S&p 500 ETF (VOO).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | TLN | Talen Energy CORP | +24.1% | +22.41% | Add |
| 2 | AMZN | Amazon.com Inc | +3.3% | NEW | New buy |
| 3 | RXO | Rxo Inc | +1.2% | — | Unchanged |
| 4 | QQQ | Invesco Qqq Trust Series 1 | -0.8% | EXIT | Sold out |
| 5 | VOO | Vanguard S&p 500 ETF | -1.3% | EXIT | Sold out |
| 6 | WDC | Western Digital CORP | -3.8% | EXIT | Sold out |
| 7 | STX | Seagate Technology Holdings plc | -4.1% | EXIT | Sold out |
| 8 | ECHO | Echostar Corp-a | -5.9% | -10.97% | Trim |
| 9 | GBTG | Global Business Travel Group | -12.8% | EXIT | Sold out |
Filing History
FAQ
What is Attestor Capital Ltd and what type of investor is it?
Attestor Capital Ltd 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 $350.1M, spread across 5 disclosed positions.
What are Attestor Capital Ltd's largest equity positions?
Based on the latest 13F filing, Attestor Capital Ltd's top holdings by market value are:
1. Talen Energy CORP (TLN) — $225.7M (64.5%)
2. Echostar Corp-a (ECHO) — $105.0M (30.0%)
3. Amazon.com Inc (AMZN) — $11.5M (3.3%)
4. Rxo Inc (RXO) — $7.9M (2.3%)
What changes did Attestor Capital Ltd make in its most recent portfolio filing?
In the latest reported quarter, Attestor Capital Ltd made 8 notable position adjustments: 1 new positions were initiated, 1 existing holdings were added to, 1 positions were partially reduced, and 5 were completely exited. The largest of these moves: Sold out: Global Business Travel Group (GBTG); Sold out: Seagate Technology Holdings plc (STX); Sold out: Western Digital CORP (WDC); New buy: Amazon.com Inc (AMZN); Sold out: Vanguard S&p 500 ETF (VOO)
What sectors does Attestor Capital Ltd focus on?
Attestor Capital Ltd is concentrated in the following sectors based on its current disclosed equity portfolio:
• Utilities: 66.0%
• Communication Services: 30.7%
• Consumer Discretionary: 3.4%
Investment Profile
Attestor Capital Ltd returned an annualized 4.8% over the trailing 6 months — underperforming the S&P 500 by 27.4 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.57 (more volatile than the market) and a 50% quarterly batting average against the index.
Its portfolio is concentrated and long-term-holding, with 66.0% of the portfolio concentrated in Utilities.
It has added to its TLN position for two straight quarters, increasing it by $171.8M to reach $225.7M.
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Developer Access
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