Geron Corporation GERN

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Geron Corporation - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 1.4200 · FX 1 USD = 1.288650 SGD · about SGD 1.8299 per unit

Sign in to place simulated trades. 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 1.15 → 1.42 · 23.5%
1.9501.5101.070 1,2,3 4 5 6 7 8 9 10 11,12 13 14,15 16 17 Jul 25Oct 25Jan 26Apr 26Jul 26

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

Price & SEC Filing History 26 Jul 2025 — 27 Jul 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.

No data yet
Weekend
Weekend
1.4500 1.4600 1.4100 1.4200 3,290,600
1.4100 1.4600 1.3900 1.4500 4,264,500
1.4400 1.4500 1.4000 1.4100 5,693,300
1.4300 1.4800 1.4200 1.4400 5,144,000
1.4400 1.4800 1.4100 1.4400 5,209,700
Weekend
Weekend
1.4100 1.4900 1.4000 1.4400 4,784,000
1.4100 1.4500 1.4000 1.4200 6,800,600
1.3700 1.4500 1.3600 1.4200 6,178,200
1.4200 1.4300 1.3500 1.3800 11,736,100
1.4900 1.5100 1.4100 1.4200 7,162,300
Weekend
Weekend
1.5600 1.5700 1.4700 1.5000 10,348,900
1.5600 1.6200 1.5500 1.5600 11,741,700
1.4700 1.5600 1.4600 1.5600 13,532,900
1.4400 1.5000 1.4100 1.4900 11,479,000
1.3600 1.4600 1.3600 1.4400 11,315,300
Weekend
Weekend
No trading
1.2900 1.3600 1.2700 1.3600 10,531,600
1.2800 1.3100 1.2600 1.2700 9,923,000
1.3200 1.3200 1.2600 1.2800 12,592,400
1.3300 1.3700 1.2900 1.3000 14,561,500
Weekend
Weekend
1.3700 1.4100 1.2800 1.3200 36,634,100
1.3800 1.4700 1.3600 1.3700 9,536,000
1.3600 1.4500 1.3600 1.3900 19,234,600
1.3200 1.3600 1.2900 1.3500 13,103,300
1.2800 1.3700 1.2700 1.3400 18,713,500
Weekend
Weekend
No trading
1.2500 1.3100 1.2300 1.2600 22,995,900
1.1800 1.2800 1.1700 1.2300 13,869,400
1.1600 1.1800 1.1400 1.1800 10,258,700
1.1600 1.2100 1.1500 1.1500 9,845,000
Weekend
Weekend
1.1400 1.1700 1.1200 1.1500 8,110,300
1.1000 1.2200 1.0800 1.1400 31,746,000
1.1100 1.1400 1.0900 1.1000 14,737,300
1.1400 1.1700 1.1100 1.1200 13,609,100
1.1900 1.1900 1.1200 1.1300 11,184,600
Weekend
Weekend
1.2100 1.2100 1.1600 1.1700 9,600,800
1.1800 1.2300 1.1700 1.2100 9,830,700
1.1800 1.1900 1.1400 1.1600 10,092,800
1.2100 1.2200 1.1500 1.1700 13,031,800
1.2500 1.2600 1.2000 1.2100 8,361,100
Weekend
Weekend
1.2700 1.2900 1.2400 1.2500 11,694,400
1.2700 1.2800 1.2500 1.2500 10,148,300
17 · 8-K After-hours · 16:01 ET 8-K ↗
1.2800 1.3000 1.2600 1.2600 8,284,500
1.3000 1.3200 1.2800 1.2800 10,873,300
No trading
Weekend
Weekend
1.2600 1.2900 1.2500 1.2800 6,865,700
1.2500 1.2800 1.2200 1.2600 8,149,900
1.2400 1.2800 1.2300 1.2600 8,387,500
1.2300 1.2500 1.2000 1.2200 10,555,400
1.3000 1.3100 1.2200 1.2300 10,359,600
Weekend
Weekend
1.4000 1.4000 1.2900 1.2900 16,158,400
1.4100 1.4300 1.3600 1.4000 18,611,900
1.4000 1.4500 1.4000 1.4100 25,244,700
1.4100 1.4400 1.3900 1.4000 26,741,800
1.3900 1.4600 1.3800 1.3900 32,391,600
Weekend
Weekend
1.5000 1.5400 1.3800 1.3900 12,746,100
1.5600 1.5800 1.4200 1.4600 17,376,700
16 · 10-Q After-hours · 16:49 ET 10-Q ↗
1.6600 1.7300 1.5500 1.5800 21,462,800
1.6000 1.6600 1.5700 1.6500 15,760,600
1.5600 1.6000 1.5400 1.5700 9,965,000
Weekend
Weekend
1.5500 1.6000 1.5300 1.5800 9,101,500
1.5100 1.5500 1.5000 1.5400 11,190,000
1.5000 1.5200 1.4800 1.5100 12,001,400
1.5200 1.5700 1.5000 1.5100 9,451,400
1.5000 1.5900 1.5000 1.5300 12,325,300
Weekend
Weekend
1.5200 1.5400 1.4900 1.5000 12,931,500
1.5400 1.5700 1.5000 1.5000 8,988,700
1.5300 1.5700 1.5100 1.5500 16,683,700
1.5500 1.5600 1.4700 1.5000 15,756,800
1.6600 1.6900 1.5500 1.5600 21,052,100
Weekend
Weekend
1.7200 1.7400 1.6600 1.6800 23,705,600
1.7000 1.7100 1.6500 1.6900 8,450,900
1.7700 1.7700 1.6800 1.6900 21,003,000
1.7500 1.8000 1.7400 1.7700 17,828,000
1.6600 1.7600 1.6500 1.7300 23,450,000
Weekend
Weekend
1.7800 1.7900 1.6600 1.6700 16,569,500
1.7100 1.7700 1.6800 1.7600 17,943,600
1.8100 1.8200 1.6700 1.7100 20,090,600
15 · DEFA14A After-hours · 16:31 ET DEFA14A ↗ 14 · DEF 14A After-hours · 16:30 ET DEF 14A ↗
1.7400 1.8400 1.7200 1.7400 17,091,700
1.6600 1.7900 1.6600 1.7500 39,279,000
Weekend
Weekend
No trading
1.6100 1.6900 1.5900 1.6600 33,581,600
1.5100 1.6600 1.5000 1.6600 26,477,800
1.4300 1.5000 1.4300 1.4900 14,404,600
1.4000 1.4300 1.3800 1.4100 16,680,000
Weekend
Weekend
1.5100 1.5400 1.4000 1.4000 19,254,000
1.5400 1.6000 1.5300 1.5400 19,706,500
13 · 8-K Pre-market · 08:18 ET 8-K ↗
1.5500 1.5900 1.5300 1.5700 14,540,200
1.5000 1.5300 1.4800 1.5100 17,644,900
1.5000 1.6100 1.4700 1.5400 19,754,100
Weekend
Weekend
1.5500 1.5500 1.4500 1.4600 39,135,200
1.5300 1.5600 1.4400 1.5500 22,187,200
1.6300 1.6300 1.5400 1.5500 15,074,000
1.6800 1.7000 1.6200 1.6200 10,937,800
1.5900 1.7200 1.5900 1.6500 13,708,000
Weekend
Weekend
1.6200 1.6300 1.5700 1.5800 13,664,000
1.6300 1.6700 1.5300 1.6000 24,741,600
1.6100 1.7200 1.5800 1.6600 20,744,900
1.6200 1.6600 1.5700 1.6300 21,640,600
1.5000 1.6300 1.5000 1.6200 13,291,100
Weekend
Weekend
1.4000 1.6000 1.4000 1.5300 18,970,900
1.4600 1.4800 1.4100 1.4200 17,965,300
1.4500 1.5100 1.4000 1.4700 16,756,900
1.5100 1.5400 1.4200 1.4400 21,446,000
1.6000 1.6500 1.5400 1.5500 14,504,000
12 · S-3ASR Pre-market · 07:47 ET S-3ASR ↗ 11 · 10-K Pre-market · 07:11 ET 10-K ↗
Weekend
Weekend
1.6300 1.7500 1.6100 1.6800 11,297,200
1.7200 1.7400 1.5400 1.6500 20,967,100
1.6800 1.8400 1.5600 1.7200 30,286,200
10 · 8-K Pre-market · 07:15 ET 8-K ↗
1.7700 1.9700 1.7600 1.9500 23,895,700
1.8400 1.9000 1.7200 1.7700 25,897,800
Weekend
Weekend
1.9000 1.9200 1.7900 1.8800 25,231,800
1.9400 2.0100 1.8500 1.9200 25,145,400
1.7900 1.9600 1.7600 1.9400 25,095,800
1.6500 1.8500 1.6500 1.8000 20,567,700
No trading
Weekend
Weekend
1.6300 1.7300 1.6200 1.6500 12,683,400
1.6400 1.6500 1.5500 1.6300 9,919,700
1.6300 1.6900 1.5600 1.6100 15,181,900
1.6100 1.6400 1.5800 1.6200 11,746,500
1.5300 1.6300 1.5100 1.6100 15,388,700
Weekend
Weekend
1.4800 1.5700 1.4600 1.5300 17,924,300
1.4600 1.5200 1.4500 1.4600 15,505,200
1.5000 1.5300 1.4600 1.4700 12,029,000
1.5300 1.5500 1.4500 1.5100 14,229,700
1.3500 1.5800 1.3500 1.5400 27,161,500
Weekend
Weekend
1.3800 1.4000 1.3300 1.3700 9,625,100
1.3400 1.3900 1.2900 1.3700 22,237,700
1.3900 1.4000 1.3300 1.3300 9,267,900
1.3500 1.3900 1.3500 1.3800 5,804,100
1.3800 1.4200 1.3400 1.3700 12,382,000
Weekend
Weekend
1.4100 1.4400 1.3500 1.3800 11,938,400
1.3300 1.4100 1.3200 1.4100 11,479,200
1.3000 1.3500 1.2900 1.3400 7,592,800
1.2800 1.3300 1.2600 1.3000 22,757,000
No trading
Weekend
Weekend
1.3200 1.3700 1.3000 1.3100 13,268,600
1.3400 1.3600 1.3000 1.3000 8,041,600
1.3100 1.3500 1.2800 1.3500 10,273,000
1.4400 1.4400 1.3100 1.3100 8,349,900
1.3500 1.4800 1.3100 1.4300 21,634,100
9 · 8-K Pre-market · 08:00 ET 8-K ↗
Weekend
Weekend
1.3700 1.4000 1.3100 1.3400 15,644,900
1.3500 1.4000 1.3200 1.3700 8,779,700
1.3100 1.4000 1.3100 1.3700 7,697,800
1.3200 1.3400 1.3000 1.3200 5,451,300
8 · 8-K Pre-market · 06:01 ET 8-K ↗
1.3200 1.3400 1.3000 1.3200 3,475,200
Weekend
Weekend
1.3300 1.3600 1.3100 1.3200 5,655,200
No trading
1.3300 1.3600 1.3100 1.3200 5,342,700
1.3500 1.3800 1.3300 1.3400 4,050,600
1.3500 1.3900 1.3300 1.3700 4,593,800
Weekend
Weekend
1.3800 1.4000 1.3600 1.3700 3,511,500
No trading
1.3200 1.4000 1.3200 1.4000 2,579,700
1.3300 1.3400 1.3000 1.3300 5,649,400
1.3100 1.3700 1.3000 1.3500 4,832,800
Weekend
Weekend
1.3600 1.3600 1.3100 1.3300 11,810,800
1.4000 1.4300 1.3300 1.3400 5,500,500
1.3600 1.4500 1.3400 1.4000 12,396,300
7 · 8-K After-hours · 16:01 ET 8-K ↗
1.3200 1.3800 1.3000 1.3400 7,603,100
1.3500 1.3800 1.3300 1.3300 8,515,300
Weekend
Weekend
1.3800 1.3900 1.3100 1.3600 10,468,100
1.2800 1.4200 1.2600 1.3900 16,304,000
1.2500 1.3000 1.2100 1.2800 6,683,200
1.2600 1.2700 1.2300 1.2300 4,299,400
1.3300 1.3700 1.2600 1.2700 6,721,800
Weekend
Weekend
1.2700 1.3200 1.2600 1.3100 4,671,400
1.2600 1.2800 1.2500 1.2700 3,614,200
1.2300 1.2800 1.2300 1.2700 7,663,700
1.1900 1.2400 1.1800 1.2300 6,608,500
1.1500 1.2000 1.1500 1.1900 6,434,000
Weekend
Weekend
1.2000 1.2100 1.1700 1.1800 4,207,400
No trading
1.1400 1.2100 1.1400 1.1900 6,243,500
1.1600 1.1700 1.1300 1.1600 6,240,300
1.1200 1.1600 1.1100 1.1600 7,017,800
Weekend
Weekend
1.0800 1.1300 1.0800 1.1200 7,307,700
1.1100 1.1300 1.0700 1.1000 12,198,200
1.1100 1.1200 1.0500 1.0800 7,983,400
1.1200 1.1400 1.0800 1.1100 4,847,100
1.1200 1.1500 1.0900 1.1300 7,480,200
Weekend
Weekend
1.1400 1.1700 1.1000 1.1200 8,035,300
1.2400 1.2500 1.1500 1.1500 7,533,200
1.2500 1.2800 1.2300 1.2400 6,462,600
1.1600 1.2600 1.1500 1.2500 12,375,200
1.0700 1.1700 1.0700 1.1600 16,684,000
Weekend
Weekend
6 · 10-Q After-hours · 16:11 ET 10-Q ↗
1.0700 1.0900 1.0400 1.0700 12,141,800
1.0700 1.1100 1.0500 1.0800 8,283,500
1.1000 1.1400 1.0400 1.0900 16,738,700
5 · 8-K Pre-market · 07:06 ET 8-K ↗
1.1800 1.2200 1.1400 1.1500 13,369,800
1.2600 1.2900 1.2000 1.2000 10,294,200
Weekend
Weekend
1.2300 1.2600 1.2200 1.2600 5,292,800
1.2300 1.2800 1.2200 1.2400 3,644,900
1.3000 1.3000 1.2200 1.2300 5,014,800
1.2700 1.2800 1.2400 1.2800 4,787,400
1.2600 1.2800 1.2400 1.2800 5,450,600
Weekend
Weekend
1.2500 1.2600 1.2100 1.2400 11,634,900
1.2400 1.2500 1.2100 1.2200 3,326,300
1.2700 1.2800 1.2200 1.2400 6,509,600
1.2800 1.3100 1.2500 1.2700 7,500,300
1.2100 1.2800 1.2100 1.2700 6,468,700
Weekend
Weekend
1.2200 1.2400 1.1900 1.2000 5,249,200
1.2900 1.2900 1.2300 1.2300 8,991,300
1.2700 1.3100 1.2500 1.2800 10,999,100
1.2700 1.2800 1.2100 1.2400 9,331,800
4 · 8-K Pre-market · 08:16 ET 8-K ↗
1.3300 1.3400 1.2600 1.2700 12,084,300
Weekend
Weekend
1.4100 1.4500 1.3000 1.3100 9,726,300
1.3900 1.4400 1.3800 1.3900 7,830,500
1.3100 1.3900 1.2800 1.3800 7,653,800
1.3000 1.3100 1.2600 1.2900 4,610,700
1.3500 1.3700 1.2700 1.2800 8,908,700
Weekend
Weekend
1.4000 1.4800 1.3400 1.3500 11,070,500
1.4200 1.4300 1.3700 1.3800 4,152,600
1.3500 1.4400 1.3500 1.4100 5,379,800
1.3100 1.3900 1.3000 1.3700 7,220,300
1.3100 1.3400 1.2900 1.3100 3,795,200
Weekend
Weekend
1.2800 1.3000 1.2700 1.2900 5,412,300
1.3500 1.3600 1.2700 1.2700 5,546,300
1.3400 1.3600 1.3200 1.3300 4,495,800
1.3500 1.3700 1.3100 1.3400 4,798,000
1.3300 1.3500 1.3000 1.3300 3,552,700
Weekend
Weekend
1.3200 1.3300 1.2900 1.3200 26,323,000
1.3000 1.3400 1.2900 1.3200 4,170,700
1.2500 1.3400 1.2500 1.2700 6,399,100
1.2600 1.2800 1.2300 1.2500 10,708,200
1.2800 1.3100 1.2600 1.2700 4,282,800
Weekend
Weekend
1.3100 1.3300 1.2700 1.2700 4,254,900
1.3000 1.3200 1.2900 1.3200 4,561,700
1.3500 1.3600 1.2700 1.2900 6,907,700
1.3700 1.3900 1.3500 1.3600 4,678,400
1.4000 1.4200 1.3600 1.3700 5,195,100
Weekend
Weekend
1.3800 1.4200 1.3600 1.4000 5,109,100
1.4000 1.4200 1.3600 1.3800 5,229,300
1.4600 1.4800 1.3800 1.4000 9,189,300
1.4000 1.5200 1.3900 1.4700 11,797,400
No trading
Weekend
Weekend
1.4400 1.4500 1.3900 1.4000 3,413,100
1.4200 1.4600 1.4100 1.4300 4,026,800
1.4500 1.4600 1.4000 1.4100 4,470,700
1.4200 1.4600 1.4100 1.4600 3,458,400
1.4600 1.4600 1.4100 1.4200 4,938,400
Weekend
Weekend
1.4100 1.4900 1.4100 1.4600 5,884,500
1.3800 1.4500 1.3700 1.4300 4,228,900
1.4100 1.4300 1.3700 1.3900 4,370,800
1.4400 1.4700 1.4100 1.4300 6,030,000
1.4900 1.5500 1.4400 1.4400 17,883,100
Weekend
Weekend
1.4800 1.5000 1.4200 1.4500 12,196,200
1.4000 1.4800 1.3800 1.4500 7,675,100
1.3700 1.4700 1.3400 1.4300 17,153,000
1.3800 1.4100 1.3100 1.3500 8,761,600
1.3200 1.4100 1.3100 1.3600 15,175,400
Weekend
Weekend
1.2900 1.3300 1.2600 1.2800 11,324,400
1.4200 1.4300 1.2900 1.3000 14,193,800
3 · 8-K After-hours · 16:16 ET 8-K ↗ 2 · 10-Q After-hours · 16:11 ET 10-Q ↗
1.3000 1.3900 1.2800 1.3900 28,417,700
1 · 8-K Pre-market · 07:10 ET 8-K ↗
1.2200 1.2400 1.1900 1.2000 8,560,800
1.1700 1.2300 1.1600 1.2100 13,974,400
Weekend
Weekend
1.1300 1.1800 1.1100 1.1700 9,862,800
1.1100 1.1600 1.0900 1.1500 12,791,900
1.1300 1.1600 1.0900 1.1000 8,825,600
1.1700 1.1700 1.1300 1.1400 10,276,300
1.2700 1.2800 1.1300 1.1500 22,667,800
Weekend
Weekend

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.

17 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
16 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:49 ET Summarise
15 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
14 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:18 ET Summarise
12 S-3ASR S-3ASR (opens SEC filing in a new tab) Pre-market · 07:47 ET Summarise
11 10-K 10-K (opens SEC filing in a new tab) Pre-market · 07:11 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:15 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:00 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) Pre-market · 06:01 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
6 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:06 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:16 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:16 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:10 ET Summarise