Top 10 Stocks with Highest Net Foreign Buying Since Early 2026: Energy and Banking Sectors Dominate

The Thai stock market in 2026 has become lively again as the SET Index surged nearly 30% since early this year, marking a standout recovery compared to other regional markets. The key driver behind this rebound is foreign investors, who have turned into major net buyers this year.

Trading data by investor group from 5 January to 21 September 2026 shows foreign investors have net bought over 55.68 billion baht, contrasting with domestic institutional investors who continue to net sell more than 80.5 billion baht. Meanwhile, securities company accounts net bought 3.05 billion baht and domestic retail investors net bought 21.77 billion baht.

A deeper look at individual stocks via NVDR data reveals 10 standout stocks with the highest net foreign buying since early this year, totaling over 143.6 billion baht. The energy and banking sectors remain highly favored among investors.

Top 10 Stocks with Highest Net Foreign Buying Since Early 2026

Rank 1: PTT Public Company Limited (PTT)

• Foreign investors net bought 34.99 billion baht at an average purchase price of 36.93 baht per share.
• Latest closing price is 42.00 baht, up 31.25% since the start of the year.
• Trading at a P/E ratio of 9.63 times.
• Market capitalization stands at 1,199.65 billion baht.

Rank 2: PTT Exploration and Production Public Company Limited (PTTEP)

• Foreign investors net bought 29.11 billion baht at an average purchase price of 143.30 baht per share.
• Latest closing price is 150.00 baht, up 32.74% since the start of the year.
• Trading at a P/E ratio of 8.60 times.
• Market capitalization stands at 595.50 billion baht.

Rank 3: Kasikornbank Public Company Limited (KBANK)

• Foreign investors net bought 22.56 billion baht at an average purchase price of 208.85 baht per share.
• Latest closing price is 258.00 baht, up 32.65% since the start of the year.
• Trading at a P/E ratio of 11.85 times.
• Market capitalization stands at 611.29 billion baht.

Rank 4: PTT Global Chemical Public Company Limited (PTTGC)

• Foreign investors net bought 11.63 billion baht at an average purchase price of 34.82 baht per share.
• Latest closing price is 48.00 baht, up 128.57% since the start of the year.
• Trading at a P/E ratio of 30.82 times.
• Market capitalization stands at 216.42 billion baht.

Rank 5: Thai Oil Public Company Limited (TOP)

• Foreign investors net bought 11.00 billion baht at an average purchase price of 53.14 baht per share.
• Latest closing price is 69.00 baht, up 91.67% since the start of the year.
• Trading at a P/E ratio of 4.76 times.
• Current market capitalization is 154.13 billion baht.

Rank 6: Bangchak Corporation Public Company Limited (BCP)

• Foreign investors net bought 10.34 billion baht at an average purchase price of 41.80 baht per share.
• Latest closing price is 54.00 baht, up 107.69% since the start of the year.
• Trading at a P/E ratio of 3.64 times.
• Market capitalization stands at 79.52 billion baht.

Rank 7: TMBThanachart Bank Public Company Limited (TTB)

• Foreign investors net bought 8.94 billion baht at an average purchase price of 2.55 baht per share.
• Latest closing price is 3.14 baht, up 55.45% since the start of the year.
• Trading at a P/E ratio of 12.95 times.
• Market capitalization stands at 306.37 billion baht.

Rank 8: The Siam Cement Public Company Limited (SCC)

• Foreign investors net bought 6.79 billion baht at an average purchase price of 228.23 baht per share.
• Latest closing price is 268.00 baht, up 46.05% since the start of the year.
• Trading at a P/E ratio of 24.01 times.
• Market capitalization stands at 321.60 billion baht.

Rank 9: Indorama Ventures Public Company Limited (IVL)

• Foreign investors net bought 4.33 billion baht at an average purchase price of 23.03 baht per share.
• Latest closing price is 29.25 baht, up 81.68% since the start of the year.
• P/E ratio not applicable.
• Market capitalization stands at 164.23 billion baht.

Rank 10: Airports of Thailand Public Company Limited (AOT)

• Foreign investors net bought 3.91 billion baht at an average purchase price of 56.36 baht per share.
• Latest closing price is 62.00 baht, up 16.98% since the start of the year.
• Trading at a P/E ratio of 47.43 times.
• Market capitalization stands at 885.71 billion baht.

Note: Data as of closing price on 21 September 2026.

It is clear that the energy sector dominates this list, occupying five of the top 10 spots, reflecting continued foreign optimism toward both upstream and downstream energy themes. Meanwhile, banking stocks like KBANK and TTB also appear, underscoring these two sectors as the main themes attracting foreign fund flows into the Thai stock market this year.

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