In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 13, 2026), Charter Oak Advisors LP reported 13 stock positions worth $119.0 million . Its top holding was Talen Energy (TLN) at 26.9% of the portfolio, followed by Sonoco Products (SON, 14.0% ) and Clean Harbors (CLH, 12.0% ). Compared with Q3 2025, it opened 2 new positions, added to 1 and reduced 5. The biggest buy was a new position in Sonoco Products (SON) and the biggest sale Talen Energy (TLN, shares −64% ).
Location NEW YORK CITY, NY
CIK 0002022905
Portfolio Value $119.0M (Q4 2025) Holdings 13 stocks · $119.0M Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q3 2025 TLN Talen Energy Corp. 85,244 $32.0M Reduce -64.0% SON Sonoco Products Co. 380,677 $16.6M New CLH Clean Harbors Inc. 60,686 $14.2M Reduce -6.0% GLW Corning Inc. 139,924 $12.3M Reduce -50.0% GLNG Golar LNG Ltd. 234,899 $8.7M Reduce -10.7% COO The Cooper Cos Inc. 76,738 $6.3M New ICE Intercontinental Exchange Inc. 38,720 $6.3M Add +35.0% CR Crane Co. 28,535 $5.3M No change PNR Pentair PLC 48,318 $5.0M No change KBR KBR Inc. 87,521 $3.5M Reduce -4.4% ATMU Atmus Filtration Technologie 66,464 $3.5M No change VVV Valvoline Inc. 117,171 $3.4M No change MOD Modine Manufacturing Co. 14,616 $2.0M No change
Portfolio Sells Q3 2025 → Q4 2025 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024
Stock Change vs Q3 2025 % Of Portfolio Change To Portfolio ▲ TLN Talen Energy Corp. Reduce -64.0% 26.86% −29.60 GLW Corning Inc. Reduce -50.0% 10.30% −2.58 KBR KBR Inc. Reduce -4.4% 2.96% +0.53 GLNG Golar LNG Ltd. Reduce -10.7% 7.35% +1.39 CLH Clean Harbors Inc. Reduce -6.0% 11.96% +3.55
Portfolio Buys Q3 2025 → Q4 2025 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024
Stock Change vs Q3 2025 % Of Portfolio Change To Portfolio ▼ SON Sonoco Products Co. New 13.96% +13.96 COO The Cooper Cos Inc. New 5.29% +5.29 ICE Intercontinental Exchange Inc. Add +35.0% 5.27% +2.56
Options Activity Q3 2025 → Q4 2025 Security Type Change vs Q3 2025 Underlying Shares Value ▼ SPY SS SPDR S&P 500 ETF Trust-US put Sold out 150,000 $99.9Mbefore exit
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
Notes & Other Activity Q3 2025 → Q4 2025 Security Class Change vs Q3 2025 Shares / Principal Value ▼ EOS ENERGY ENTER -CW26 *W EXP 11/17/202 Sold out 300,000 $537Kbefore exit
Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 13 $172.5M TLN, MOD, SON, AER, GLNG Q1 2026 13 $165.0M TLN, MOD, SON, GLNG, CLH Q4 2025 13 $119.0M TLN, SON, CLH, GLW, GLNG Q3 2025 11 $178.3M TLN, GLW, CLH, GLNG, PNR Q2 2025 13 $162.4M TLN, ANSS, CLH, GLW, GDDY Q1 2025 13 $139.1M TLN, ANSS, KBR, GDDY, GLW Q4 2024 14 $156.3M KBR, TLN, ICE, CLH, PNR