Tantech Holdings Ltd. - Class A Common Shares (TANH)
TANH moved a median of -1.97% 30 minutes after news, and -1.08% by the close. How TANH actually reacts to news — the realized, point-in-time move the market made, measured across 90 labeled events over the last three years with zero look-ahead.
TANH’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -1.59% | 20% | 87 |
| 30-min | -1.97% | 28% | 90 |
| 60-min | -1.20% | 34% | 90 |
| to close | -1.08% | 40% | 90 |
| Middle 50% of TANH reactions | -5.99% to +0.11% |
|---|---|
| Median reaction (30-min) | -1.97% |
| Measured reactions | 90 |
Half of all Tantech Holdings Ltd. - Class A Common Shares news events land between -5.99% and +0.11% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when TANH moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to TANH's baseline. Nothing else.
Recent TANH events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 6-K TANTECH HOLDINGS LTD For: Oct 02 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -1.48% | |
| Form 6-K TANTECH HOLDINGS LTD For: Sep 24 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -0.89% | |
| Form 6-K TANTECH HOLDINGS LTD For: Sep 01 | SEC filing · Form 6-K | SEC EDGAR | +4.56% | -28.16% | |
| Tantech Holdings Ltd. Announces Reverse Split Record Date | Press release | GlobeNewswire | +4.56% | -28.16% | |
| Form 6-K TANTECH HOLDINGS LTD For: Aug 19 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +6.39% | |
| Form 6-K/A TANTECH HOLDINGS LTD For: Aug 07 | SEC filing · Form 6-K | SEC EDGAR | +1.94% | +0.24% | |
| Form 6-K TANTECH HOLDINGS LTD For: Aug 05 | SEC filing · Form 6-K | SEC EDGAR | +1.73% | -2.09% | |
| Form 6-K TANTECH HOLDINGS LTD For: Aug 04 | SEC filing · Form 6-K | SEC EDGAR | -2.14% | -1.36% | |
| Form EFFECT TANTECH HOLDINGS LTD | SEC filing · Form EFFECT | SEC EDGAR | -2.53% | -22.26% | |
| Form F-3 TANTECH HOLDINGS LTD | SEC filing · Form F-3 | SEC EDGAR | +0.01% | -3.83% | |
| Form 20-F TANTECH HOLDINGS LTD For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | -5.84% | -6.55% | |
| Form NT 20-F TANTECH HOLDINGS LTD For: Dec 31 | SEC filing · Form NT | SEC EDGAR | +0.00% | -2.62% | |
| Form 6-K TANTECH HOLDINGS LTD For: Apr 01 | SEC filing · Form 6-K | SEC EDGAR | -2.18% | +0.74% | |
| Form 6-K TANTECH HOLDINGS LTD For: Mar 31 | SEC filing · Form 6-K | SEC EDGAR | -29.72% | -20.41% | |
| Tantech Holdings Ltd Announces Pricing and Closing of $2.15 Million Registered Direct Offering and Private Placements | Press release | PR Newswire | +4.49% | -11.98% | |
| Tantech Receives NASDAQ Notification Regarding Minimum Bid Requirements | Press release | PR Newswire | -29.72% | -20.41% | |
| Form 6-K TANTECH HOLDINGS LTD For: Mar 24 | SEC filing · Form 6-K | SEC EDGAR | -0.00% | +2.32% | |
| Tantech Holdings Ltd Announces Notice of Allowance from U.S. Patent and Trademark Office for Hanging Cabinet Design Patent | Press release | PR Newswire | — | +19.41% | |
| Form 6-K TANTECH HOLDINGS LTD For: Mar 23 | SEC filing · Form 6-K | SEC EDGAR | -0.01% | -10.67% | |
| Tantech Holdings Subsidiary, Tanhome Group Inc., Receives Notice of Allowance from USPTO for "TANHOME" Trademark, Fortifying North American Green Building Strategy | Press release | PR Newswire | -8.31% | +0.33% | |
| Form 6-K TANTECH HOLDINGS LTD For: Jan 15 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +0.48% | |
| Form 6-K TANTECH HOLDINGS LTD For: Dec 31 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +5.26% | |
| Form 6-K TANTECH HOLDINGS LTD For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | -0.81% | +11.20% | |
| Form 6-K TANTECH HOLDINGS LTD For: Dec 11 | SEC filing · Form 6-K | SEC EDGAR | -0.49% | +0.99% | |
| Form 6-K TANTECH HOLDINGS LTD For: Oct 23 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -3.05% | |
| Form 6-K TANTECH HOLDINGS LTD For: Oct 17 | SEC filing · Form 6-K | SEC EDGAR | -0.59% | -1.18% | |
| Form 6-K TANTECH HOLDINGS LTD For: Sep 24 | SEC filing · Form 6-K | SEC EDGAR | -1.59% | -2.12% | |
| Form 20-F/A TANTECH HOLDINGS LTD For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | +0.48% | +0.95% | |
| Form 6-K TANTECH HOLDINGS LTD For: Jun 02 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +6.40% | |
| Form 20-F TANTECH HOLDINGS LTD For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | -0.64% | +0.96% | |
| Gohomeway Group Inc. Completes EU Trademark Registration, Marking a Key Step in Global Branding | Press release | PR Newswire | +7.35% | +15.20% | |
| Form NT 20-F TANTECH HOLDINGS LTD For: Dec 31 | SEC filing · Form NT | SEC EDGAR | +0.25% | -0.98% | |
| Form 6-K TANTECH HOLDINGS LTD For: Mar 03 | SEC filing · Form 6-K | SEC EDGAR | -5.00% | -9.67% | |
| Tantech Holdings Regains Compliance with NASDAQ Minimum Bid Price Requirement | Press release | PR Newswire | -5.00% | -9.67% | |
| Form 6-K TANTECH HOLDINGS LTD For: Feb 10 | SEC filing · Form 6-K | SEC EDGAR | -1.78% | +5.33% | |
| Tantech Holdings Announces 1-for-40 Common Share Consolidation | Press release | PR Newswire | -1.78% | +5.33% | |
| Tantech Holdings Ltd. (TANH) Subsidiary Registers U.S. Trademark | Press release | PR Newswire | -2.35% | -4.35% | |
| Tantech Holdings Ltd. (TANH) Subsidiary Gohomeway Group Inc. Successfully Registers EU Trademark | Press release | PR Newswire | -3.40% | +4.32% | |
| Gohomeway Group Inc., a TANH Subsidiary, Named Chair of the Home Furnishing Materials Committee, American Chinese National Chamber of Commerce | Press release | PR Newswire | -3.91% | -4.52% | |
| Form 6-K TANTECH HOLDINGS LTD For: Jan 07 | SEC filing · Form 6-K | SEC EDGAR | -3.73% | -10.54% | |
| Form 6-K TANTECH HOLDINGS LTD For: Jan 06 | SEC filing · Form 6-K | SEC EDGAR | +2.35% | +0.30% | |
| Form 6-K TANTECH HOLDINGS LTD For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | -4.41% | -2.14% | |
| Form 6-K TANTECH HOLDINGS LTD For: Dec 27 | SEC filing · Form 6-K | SEC EDGAR | -11.14% | -13.64% | |
| Tantech's U.S. Subsidiary Signs $5 Million Sales Contract | Press release | PR Newswire | -11.14% | -13.64% | |
| Form 6-K TANTECH HOLDINGS LTD For: Dec 20 | SEC filing · Form 6-K | SEC EDGAR | -1.23% | -0.07% | |
| Form 6-K TANTECH HOLDINGS LTD For: Dec 11 | SEC filing · Form 6-K | SEC EDGAR | -8.14% | -14.24% | |
| Tantech Holdings Ltd Establishes New U.S.-Based Subsidiaries | Press release | PR Newswire | -8.14% | -14.24% | |
| Form 6-K TANTECH HOLDINGS LTD For: Sep 10 | SEC filing · Form 6-K | SEC EDGAR | -5.50% | -13.88% | |
| Form 6-K TANTECH HOLDINGS LTD For: Aug 28 | SEC filing · Form 6-K | SEC EDGAR | -2.13% | -6.33% | |
| Tantech Holdings Ltd Receives NASDAQ Minimum Bid Price Requirement Extension | Press release | PR Newswire | -2.13% | -6.33% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the TANH section they belong to.
Where else TANH is measured.
TANH earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| EMX Royalty Corporation Common Shares (Canada) (EMX) | 91 | -0.00% | 46% |
| GOLD RESERVE INC A NEW (GDRZF) | 90 | 0.00% | 40% |
| Search Minerals Inc (SMY_CDNX) | 89 | 0.00% | 21% |
| Sociedad Quimica y Minera S.A. (SQM) | 89 | +0.04% | 54% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Basic Materials names, measured the same way →
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How the numbers are made.
How is Tantech Holdings Ltd. - Class A Common Shares's median reaction calculated?
Every labeled TANH news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 90 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 28% of TANH's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does TANH's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.