Attestor Capital Ltd
Attestor Capital Ltd declares $237.3M in 2 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 67.8% of its $350.1M 13F portfolio. Largest positions: Talen Energy (1.2% of the company) and Amazon (0.00% of the company). Over time: $237.3M in 2 of these companies for Q2 2026, against $64.1M in 3 for Q4 2025 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $52.8M and sold $29.7M of these stocks, at the quarter's prices: a net purchase of $23.2M; 1 new position and 2 sold out.
Performance of its AI picks
The AI-stock portfolio Attestor Capital Ltd declared for Q2 2026 (Form 13F), held unchanged, returned -17.5% in Q3 2026 (SMH -7.1%). Trades made during a quarter are not visible in 13F filings: this measures its declared picks, not the return of its funds.
Largest positions
- Talen Energy (TLN) — $225.7M: 587,470 shares, 1.2% of the company, 64.5% of its portfolio (added this quarter); held since Q4 2025
- Amazon (AMZN) — $11.5M: 48,300 shares, 0.00% of the company, 3.3% of its portfolio (new position this quarter)
By sector
- Power, electrical & cooling — $225.7M, 95% of its AI holdings, 1 company
- Cloud & AI giants — $11.5M, 5% of its AI holdings, 1 company
Biggest changes this quarter
- added to Talen Energy (TLN): +$41.3M at the quarter's price
- sold out of Seagate (STX): -$15.4M at the quarter's price
- sold out of Western Digital (WDC): -$14.3M at the quarter's price
- opened a position in Amazon (AMZN): +$11.5M at the quarter's price
Other holders of this size
- Vanguard — $3.6T in 225 of these companies
- BlackRock — $3.1T in 226 of these companies
- State Street — $1.6T in 222 of these companies
- Fidelity (FMR) — $1.2T in 223 of these companies
- Geode Capital — $890.9B in 220 of these companies
- Capital Group — $881.7B in 132 of these companies
- JPMorgan — $717.8B in 225 of these companies
- Invesco — $683.3B in 220 of these companies
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