Tantech Holdings Ltd. - Class A Common Shares TANH

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Tantech Holdings Ltd. - Class A Common Shares · Company · Nasdaq · Consumer Defensive / Household & Personal Products

Paper trade (simulated — no real money)

Fill: USD 17.7100 · FX 1 USD = 1.277900 SGD · about SGD 22.6316 per unit

Sign in to practise with simulated trades before investing real money. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 1.59 → 17.71 · 1013.8%
24.83012.5700.311 1 2 3 4 5 6 7,8 9 10,11 12 13 14 15 16 17 18 19 20 Oct 25Jan 26Apr 26Jul 26Oct 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 24 Oct 2025 — 25 Oct 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

Weekend
Weekend
17.3950 21.4000 13.0100 17.7100 605,119
8.9920 28.2500 8.0100 24.8300 2,212,200
9.9900 10.3400 8.8000 8.8100 26,300
10.9000 11.4300 9.5110 10.1300 289,600
13.6100 14.6000 10.0000 10.2000 177,700
Weekend
Weekend
13.2700 14.0000 11.8000 13.6200 35,000
14.1500 14.5100 12.6840 12.8400 34,900
15.3000 16.5980 13.3300 13.9000 82,300
16.8600 18.5900 16.2700 16.2700 134,600
16.1000 17.4400 16.1000 17.2700 37,100
Weekend
Weekend
16.9500 18.0700 16.2600 17.0100 69,600
17.2500 17.4800 15.2400 17.4800 45,200
16.8700 17.9800 15.2500 16.9000 121,800
14.4000 16.8800 14.0000 16.8800 68,500
14.2300 15.2900 13.8040 14.0200 51,400
Weekend
Weekend
20 · 6-K After-hours · 16:45 ET REPORT OF FOREIGN PRIVATE ISSUER ↗
13.8800 14.9000 13.8800 14.7900 19,800
14.3000 15.4500 13.8800 13.8800 17,800
14.1100 15.0000 13.3000 15.0000 8,100
17.9800 17.9800 14.0900 14.6200 17,100
15.4000 17.6000 14.6100 17.5000 53,300
Weekend
Weekend
14.9900 14.9900 13.4100 14.3750 5,900
14.6300 14.6300 13.7850 14.5000 8,000
19 · 6-K Pre-market · 08:00 ET FORM 6-K ↗
15.6000 15.6000 13.0000 14.4500 30,200
12.7200 16.4550 12.7200 15.0500 19,200
13.4300 13.4300 12.6200 12.8700 8,600
Weekend
Weekend
13.8700 15.3000 13.3600 13.5000 33,500
15.5600 17.5950 13.7500 13.9800 19,400
19.2100 20.3200 14.9400 14.9400 51,600
19.6000 20.9050 19.0000 19.6300 137,200
20.0300 21.5200 19.4250 21.5200 18,000
Weekend
Weekend
28.4200 29.8900 19.0200 20.4500 107,200
19.5800 24.3000 19.5800 23.7400 71,300
18.0600 20.0500 18.0500 19.9000 53,100
21.5200 21.5200 17.4250 18.7900 118,800
No trading
Weekend
Weekend
17.4000 25.0000 16.6550 21.8700 71,100
11.5000 21.0000 11.4000 19.2000 2,163,510
16.0000 16.7500 10.0500 11.5000 34,124
18 · 6-K After-hours · 16:30 ET FORM 6-K ↗
17.5000 20.5000 16.5000 17.0000 126,310
17.5000 19.0000 16.9000 17.3500 1,722
Weekend
Weekend
18.5000 19.4500 17.0000 17.0000 2,636
18.6500 19.6000 18.5000 18.6500 374
19.0000 19.4500 18.5500 18.9500 308
18.5000 19.9000 18.5000 19.0500 860
19.1000 19.1000 17.9000 18.1500 948
Weekend
Weekend
0.3900 0.4070 0.3600 0.3800 194,500
0.3600 0.3940 0.3510 0.3830 104,900
17 · 6-K After-hours · 17:00 ET FORM 6-K ↗
0.3590 0.4000 0.3400 0.3850 147,700
0.3570 0.3710 0.3400 0.3410 128,700
0.3830 0.4000 0.3200 0.3710 5,607,800
Weekend
Weekend
0.3600 0.3990 0.3500 0.3970 2,736,400
0.3500 0.3750 0.3200 0.3650 386,100
0.4260 0.4500 0.3810 0.4010 3,350,600
0.4390 0.4390 0.4110 0.4190 68,200
0.4230 0.4400 0.4100 0.4280 71,800
Weekend
Weekend
0.4300 0.4400 0.3960 0.4230 255,100
16 · 6-K/A Pre-market · 06:02 ET FORM 6-K/A ↗
0.4300 0.4440 0.3810 0.4210 275,500
15 · 6-K Next filing day · accepted 05 Aug, 18:19 ET FORM 6-K ↗
0.4110 0.4400 0.3920 0.4140 286,200
14 · 6-K After-hours · 16:37 ET FORM 6-K ↗
0.4350 0.4400 0.4110 0.4300 66,900
0.4300 0.4380 0.4030 0.4170 175,000
Weekend
Weekend
0.4200 0.4410 0.3780 0.4210 237,900
0.4290 0.4400 0.3930 0.4190 107,900
0.4130 0.4500 0.3880 0.4130 128,100
0.4000 0.4300 0.3900 0.4260 244,400
0.4080 0.4200 0.3800 0.4000 302,400
Weekend
Weekend
0.4330 0.4690 0.4010 0.4210 359,500
0.4650 0.4700 0.4200 0.4320 99,800
0.4490 0.4800 0.4220 0.4620 56,200
0.4390 0.5300 0.4140 0.4630 674,100
0.4340 0.4400 0.4140 0.4270 53,500
Weekend
Weekend
0.4200 0.4480 0.4100 0.4340 44,500
0.4170 0.4480 0.4060 0.4170 82,400
0.4070 0.4440 0.3900 0.4300 121,200
0.3990 0.4890 0.3810 0.4000 1,994,700
0.4400 0.4510 0.3980 0.4090 992,000
Weekend
Weekend
0.4390 0.4600 0.4150 0.4550 336,400
0.4280 0.4500 0.3910 0.4420 417,400
0.4080 0.4520 0.3890 0.4280 687,300
0.3970 0.4450 0.3870 0.4080 766,300
0.3810 0.4300 0.3520 0.4070 850,000
Weekend
Weekend
No trading
0.3800 0.4000 0.3800 0.3990 235,400
0.3600 0.4140 0.3600 0.3760 592,900
0.4200 0.4220 0.3700 0.3800 74,700
0.4100 0.4250 0.4050 0.4150 65,100
Weekend
Weekend
0.3700 0.4160 0.3650 0.4050 174,100
0.4060 0.4440 0.3640 0.3900 169,500
0.4460 0.4790 0.4250 0.4480 101,600
0.4650 0.4840 0.4110 0.4600 182,200
0.4800 0.4840 0.4410 0.4840 35,400
Weekend
Weekend
No trading
0.5990 0.5990 0.4400 0.4660 315,800
0.4300 0.6400 0.4300 0.5800 2,251,200
0.4710 0.4980 0.4060 0.4320 117,300
0.4600 0.5050 0.4600 0.4900 35,400
Weekend
Weekend
0.4800 0.4980 0.4690 0.4810 75,900
0.4970 0.5000 0.4620 0.4790 225,800
0.4790 0.5700 0.4630 0.5110 1,699,600
13 · F-3 After market open · 09:55 ET FORM F-3 ↗
0.4890 0.4990 0.4370 0.4600 428,700
0.4380 0.5200 0.4200 0.4910 1,018,700
Weekend
Weekend
0.4100 0.4450 0.4000 0.4200 108,400
0.4500 0.4590 0.4000 0.4250 63,400
0.4450 0.4600 0.4300 0.4480 17,700
0.4430 0.4700 0.4300 0.4510 54,300
0.4300 0.4600 0.4070 0.4600 49,300
Weekend
Weekend
0.4120 0.4460 0.3800 0.4270 84,900
0.4100 0.4300 0.3880 0.4090 238,800
0.4090 0.4400 0.3930 0.4120 120,100
0.4110 0.4320 0.3800 0.4070 346,000
No trading
Weekend
Weekend
0.4500 0.4500 0.4000 0.4200 389,300
0.4450 0.4900 0.4300 0.4500 216,000
0.4310 0.4480 0.4170 0.4450 329,600
0.3900 0.4600 0.3840 0.4400 508,300
0.4030 0.4360 0.3800 0.3900 136,300
Weekend
Weekend
0.4200 0.4400 0.3810 0.3920 181,300
12 · 20-F After-hours · 16:33 ET FORM 20-F ↗
0.3920 0.4420 0.3900 0.4330 395,400
0.4240 0.4240 0.3600 0.3800 260,200
0.3700 0.4400 0.3700 0.4240 599,600
0.3660 0.3720 0.3550 0.3560 150,800
Weekend
Weekend
0.3640 0.4100 0.3540 0.3550 442,800
0.3620 0.3850 0.3620 0.3620 24,100
0.3750 0.3800 0.3620 0.3630 27,800
0.3900 0.3900 0.3750 0.3760 16,500
0.3820 0.4000 0.3710 0.3720 72,000
Weekend
Weekend
0.4120 0.4210 0.3900 0.3910 49,300
0.4220 0.4220 0.3840 0.3950 44,100
0.3870 0.4300 0.3620 0.4120 276,300
0.3310 0.4490 0.3310 0.3890 752,500
0.3550 0.3680 0.3230 0.3400 53,100
Weekend
Weekend
0.3480 0.3700 0.3440 0.3440 14,400
0.3510 0.3600 0.3500 0.3500 32,500
0.3450 0.3670 0.3410 0.3580 58,500
0.3680 0.3800 0.3430 0.3450 73,900
0.3500 0.3740 0.3310 0.3690 114,000
Weekend
Weekend
0.3700 0.3700 0.3410 0.3480 228,900
0.3250 0.3740 0.3100 0.3700 322,700
0.3100 0.3330 0.3020 0.3120 588,500
0.3070 0.3500 0.3020 0.3190 499,200
0.3400 0.3540 0.3100 0.3110 360,000
Weekend
Weekend
0.3700 0.4190 0.3530 0.3700 1,105,500
0.3690 0.3690 0.3370 0.3650 50,300
0.3750 0.3800 0.3500 0.3770 145,100
0.3700 0.3790 0.3200 0.3610 405,700
0.3760 0.3820 0.3610 0.3790 321,500
Weekend
Weekend
No trading
11 · 6-K After-hours · 16:15 ET FORM 6-K ↗ 10 · 424B5 After-hours · 16:05 ET 424B5 ↗
0.3600 0.5530 0.3600 0.4100 2,194,700
0.4450 0.4720 0.3340 0.3920 1,068,800
0.7400 0.7400 0.3700 0.5890 896,700
9 · 6-K Pre-market · 08:31 ET FORM 6-K ↗
0.6900 0.7060 0.6560 0.7060 11,600
Weekend
Weekend
0.7000 0.7290 0.6530 0.7200 23,900
0.7370 0.7960 0.7030 0.7540 24,200
8 · 6-K After-hours · 16:03 ET FORM 6-K ↗
0.6230 0.7880 0.5700 0.7520 243,100
7 · 424B5 Pre-market · 09:16 ET 424B5 ↗
0.7700 0.7700 0.4300 0.6790 1,100,300
6 · 6-K After-hours · 16:03 ET FORM 6-K ↗
0.8410 0.8800 0.7260 0.7550 304,300
Weekend
Weekend
0.8750 0.8810 0.8010 0.8350 24,400
0.8920 0.8970 0.8590 0.8970 23,100
0.8900 0.9000 0.8140 0.8800 55,200
0.8720 1.0000 0.8110 0.9120 360,700
0.8110 0.9070 0.8110 0.8500 12,600
Weekend
Weekend
0.8580 0.8580 0.8100 0.8110 10,300
0.9080 0.9080 0.8260 0.8650 42,500
0.7660 1.0300 0.7360 1.0300 271,700
0.7780 0.7780 0.7340 0.7610 7,700
0.7990 0.8370 0.7340 0.7570 23,500
Weekend
Weekend
0.8000 0.8000 0.7550 0.7880 7,500
0.8300 0.8350 0.7500 0.7980 9,300
0.8000 0.8350 0.7960 0.8300 13,500
0.8100 0.8100 0.7340 0.8020 14,300
0.8100 0.8400 0.7500 0.8040 36,800
Weekend
Weekend
0.8300 0.8560 0.7890 0.8230 38,600
0.8490 0.8960 0.8200 0.8450 12,400
0.8800 0.8950 0.8300 0.8550 21,400
0.9200 0.9600 0.8550 0.8790 31,300
0.9020 0.9600 0.9000 0.9600 7,900
Weekend
Weekend
0.8700 0.9900 0.8700 0.9800 18,600
0.8700 0.9000 0.8400 0.8880 9,700
0.8320 0.9000 0.8320 0.9000 7,400
0.8220 0.9100 0.8220 0.9000 4,300
No trading
Weekend
Weekend
0.8480 0.9200 0.8000 0.9190 37,300
0.9070 0.9800 0.8100 0.8710 77,100
0.9400 0.9500 0.9000 0.9170 26,100
0.9800 1.0300 0.9100 0.9910 41,400
0.9020 1.0100 0.9020 1.0100 170,100
Weekend
Weekend
0.8090 0.9600 0.8000 0.9160 94,000
0.7810 0.8390 0.7800 0.8280 29,500
0.7990 0.8390 0.7800 0.8290 47,200
0.7970 0.8950 0.7800 0.8370 40,700
0.7400 0.9000 0.7260 0.8150 148,800
Weekend
Weekend
0.8730 0.9670 0.8000 0.8760 3,488,100
0.9500 1.0500 0.8500 1.0050 170,900
1.0100 1.0600 0.9500 0.9500 138,400
1.0020 1.0200 0.9620 1.0000 22,400
1.0000 1.0000 0.9500 0.9520 16,700
Weekend
Weekend
1.0200 1.0200 0.9900 1.0000 23,000
1.0310 1.0310 0.9800 1.0100 34,100
0.9900 1.0600 0.9840 1.0100 22,800
0.9600 1.0000 0.9600 0.9600 17,800
No trading
Weekend
Weekend
0.9790 1.0500 0.9790 0.9820 10,400
5 · 6-K After-hours · 16:05 ET FORM 6-K ↗
0.9800 1.0000 0.9540 0.9620 11,400
0.9920 1.0000 0.9750 0.9800 9,100
1.0300 1.0300 0.9920 0.9920 22,800
1.0500 1.0500 1.0000 1.0100 50,000
Weekend
Weekend
1.0400 1.0400 0.9900 1.0200 23,900
1.0200 1.0400 0.9800 1.0100 52,000
0.9900 1.0400 0.9810 1.0000 20,000
1.0100 1.0100 0.9600 0.9750 22,800
0.9900 1.0100 0.9560 1.0100 93,200
Weekend
Weekend
1.0000 1.0000 0.9320 1.0000 47,200
No trading
0.9500 1.0100 0.9000 1.0000 73,800
4 · 6-K Pre-market · 08:30 ET FORM 6-K ↗
0.9910 1.0400 0.9230 1.0000 99,900
0.9890 1.0000 0.9210 0.9370 53,500
Weekend
Weekend
0.9970 1.0350 0.9260 1.0200 84,600
No trading
1.0100 1.0600 0.9830 0.9970 11,300
1.0200 1.0860 0.9900 0.9900 58,200
1.0800 1.1300 1.0100 1.0650 118,200
Weekend
Weekend
0.9600 1.0900 0.9600 1.0800 106,100
3 · 6-K Pre-market · 08:11 ET FORM 6-K ↗
0.9980 0.9980 0.9600 0.9710 10,900
0.9370 1.0200 0.9360 1.0000 20,400
0.9560 0.9560 0.9200 0.9510 25,600
1.0000 1.0000 0.9600 0.9700 20,500
Weekend
Weekend
1.0100 1.0300 0.9590 1.0200 24,300
2 · 6-K After-hours · 17:00 ET FROM 6-K ↗
1.0450 1.0600 1.0000 1.0300 22,300
1.0650 1.0800 1.0500 1.0800 9,500
1.1220 1.1220 1.0500 1.0600 17,200
1.0900 1.1230 1.0400 1.1100 44,700
Weekend
Weekend
1.1300 1.1300 1.0200 1.1100 30,500
1.1190 1.1200 1.0900 1.1200 10,300
1.1000 1.1200 0.9830 1.1200 18,200
1.1100 1.1200 1.1100 1.1200 2,100
1.1600 1.1870 1.1000 1.1300 61,500
Weekend
Weekend
1.0700 1.2000 1.0600 1.1900 64,200
No trading
1.0200 1.0900 1.0200 1.0500 11,200
1.0500 1.0600 1.0300 1.0400 11,300
1.0200 1.0700 1.0030 1.0700 28,400
Weekend
Weekend
0.9800 1.0400 0.9350 0.9860 103,100
0.9700 1.0400 0.9600 0.9920 69,100
1.0200 1.0400 0.9500 1.0100 68,400
0.9900 1.0400 0.9450 1.0200 36,100
1.1070 1.1400 0.9400 1.0100 125,200
Weekend
Weekend
1.0900 1.1540 1.0700 1.1200 57,300
1.1100 1.1800 1.0800 1.1200 72,600
1.1600 1.1650 1.1200 1.1200 44,100
1.1550 1.1780 1.1000 1.1500 36,400
1.1400 1.1920 1.1100 1.1300 38,400
Weekend
Weekend
1.1800 1.1900 1.0700 1.1500 85,000
1.1700 1.1900 1.1550 1.1700 50,500
1.2600 1.2600 1.1300 1.1700 161,500
1.3200 1.3200 1.2500 1.2800 38,900
1.3700 1.3900 1.2400 1.3200 58,400
Weekend
Weekend
1.4000 1.4000 1.2100 1.3600 136,000
1.5600 1.5600 1.3900 1.4100 200,600
1.6200 1.6200 1.5400 1.5550 60,400
1.5700 1.5900 1.5500 1.5900 40,300
1.6250 1.6300 1.5500 1.5650 51,400
Weekend
Weekend
1.6400 1.6400 1.5750 1.5900 100,600
1 · 6-K Next filing day · accepted 23 Oct, 20:45 ET FORM 6-K ↗

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

20 6-K REPORT OF FOREIGN PRIVATE ISSUER (opens SEC filing in a new tab) After-hours · 16:45 ET Summarise
19 6-K FORM 6-K (opens SEC filing in a new tab) Pre-market · 08:00 ET Summarise
18 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
17 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
16 6-K/A FORM 6-K/A (opens SEC filing in a new tab) Pre-market · 06:02 ET Summarise
15 6-K FORM 6-K (opens SEC filing in a new tab) Next filing day · accepted 05 Aug, 18:19 ET Summarise
14 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 16:37 ET Summarise
13 F-3 FORM F-3 (opens SEC filing in a new tab) After market open · 09:55 ET Summarise
12 20-F FORM 20-F (opens SEC filing in a new tab) After-hours · 16:33 ET Summarise
11 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
10 424B5 424B5 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
9 6-K FORM 6-K (opens SEC filing in a new tab) Pre-market · 08:31 ET Summarise
8 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
7 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 09:16 ET Summarise
6 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
5 6-K FORM 6-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
4 6-K FORM 6-K (opens SEC filing in a new tab) Pre-market · 08:30 ET Summarise
3 6-K FORM 6-K (opens SEC filing in a new tab) Pre-market · 08:11 ET Summarise
2 6-K FROM 6-K (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
1 6-K FORM 6-K (opens SEC filing in a new tab) Next filing day · accepted 23 Oct, 20:45 ET Summarise