Key Highlights

  • TANH is trading up 34.62% at $11.86 on October 22, and the market capitalization was about $2.95 million at the October 19 close.
  • The shares fell 25.11% to $10.20 on October 19, after trading was halted for volatility and then resumed.
  • A 1-for-50 reverse split took effect on September 4, cutting the share count from 33,382,332 to about 667,647.
  • Full-year 2025 revenue was $38.36 million, down about 10.7% from $42.94 million.
  • The 2025 net loss was $31.42 million.

Why Is Tantech Stock Surging 35% Today?

Tantech (NASDAQ:TANH) is trading up 34.62% at $11.86 on October 22, and no company announcement was identified for the session. The move follows a week in which the shares fell 25.11% to $10.20 on October 19 after trading was halted for volatility and then resumed, according to exchange halt notices.

What investors may be missing is how little of the recent price action has a disclosed trigger. The latest dated company items are a reverse split notice on September 1 and a registered direct offering on March 31, and neither is new this week.

Tantech develops and makes bamboo-based charcoal products for household purification, agricultural and cleaning uses in China and internationally. Its Charcoal Doctor line includes air purifiers, humidifiers and automotive air-purification accessories, and a subsidiary named Tanhome Group is building out flooring and cabinet products.

How Did the 1-for-50 Reverse Split Change the Share Count?

The board approved a 1-for-50 reverse split of the Class A common shares, with a record date of September 3 and split-adjusted trading beginning September 4 under a new CUSIP. Outstanding shares fell from 33,382,332 to about 667,647.

The split followed a Nasdaq notice dated March 26, which said the closing bid had stayed under $1.00 for 30 consecutive business days. The 180-day compliance period was set to end on September 22, and the company said at the time it was evaluating options including a reverse split. This was not the first consolidation, since a 1-for-40 share combination was announced in February 2025 and compliance was regained in March 2025.

At the October 19 close the market capitalization was about $2.95 million. A very small float after two consolidations means each trade can move the price by a large percentage.

What Do the Offering and Resale Filings Say About Funding?

On March 31 the company priced a registered direct offering and private placements raising about $2.15 million in gross proceeds. It sold 7,166,671 common units at $0.30 each, with Series E and Series F warrants attached, and the proceeds were designated for general corporate purposes and working capital. Those figures are pre-split.

A later filing registered about 43 million Class A shares for sale by existing holders. None of these filings ties directly to today's session.

Full-year 2025 revenue was $38.36 million, down about 10.7% from $42.94 million in 2024. The net loss for the year was $31.42 million, a loss about 869% larger than the year before. Smaller items include a design patent allowance for a hanging cabinet on March 25.

What Should Investors Watch After the Latest Volatility Halts?

The shares have been halted for volatility at least twice in recent weeks, in late September and again on October 19. Investors will watch for any company statement explaining the activity, the next half-year results and further Nasdaq correspondence, though no dates have been announced. Until then the stock is trading on its share structure, funding history and loss profile, with no company-specific catalyst identified for October 22.