Aspen Aerogels, Inc ASPN

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Aspen Aerogels, Inc. Common Stock · Company · NYSE

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

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

USD 7.77 → 5.31 · -31.7%
8.8205.6952.570 1,2 3 4,5 6 7 8,9 10 11,12 13 14 15 16 Jul 25Oct 25Jan 26Apr 26Jul 26

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

Price & SEC Filing History 22 Jul 2025 — 23 Jul 2026 (Last year)

Daily NYSE 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
5.3500 5.4700 5.2900 5.3100 752,919
5.1600 5.4450 5.0800 5.4300 890,000
5.1000 5.2100 5.0050 5.0300 720,400
Weekend
Weekend
4.9600 5.2450 4.8800 5.1300 885,900
5.2400 5.4400 4.9800 5.0500 813,000
5.3400 5.4800 5.1310 5.3000 685,400
5.2700 5.3850 5.2050 5.2700 640,300
5.1600 5.2300 5.0700 5.1800 914,000
Weekend
Weekend
5.2500 5.2500 5.1250 5.1600 717,700
5.2700 5.3350 5.1850 5.2400 679,500
5.0400 5.2100 5.0400 5.1900 949,300
5.3500 5.3500 5.0350 5.1400 1,362,600
5.6200 5.7900 5.4400 5.4700 1,132,700
Weekend
Weekend
No trading
5.9100 6.1050 5.5100 5.5800 1,513,200
6.3900 6.3900 5.8900 5.9300 1,187,300
6.0000 6.4250 5.9900 6.3400 2,063,000
5.6400 5.9800 5.4550 5.9800 1,972,800
Weekend
Weekend
5.5000 5.6400 5.3350 5.6300 3,371,400
5.8300 5.8450 5.5700 5.6800 1,206,500
5.9200 5.9200 5.5500 5.7300 1,263,100
6.1700 6.4250 5.8900 5.9000 1,631,300
6.3100 6.5150 6.0900 6.3700 1,797,900
Weekend
Weekend
No trading
6.1800 6.3990 5.9900 6.3200 2,201,500
5.8000 6.3600 5.7300 6.0500 1,559,300
5.9300 6.1400 5.7850 5.8200 1,808,600
6.1400 6.2100 5.9600 6.0400 1,225,700
Weekend
Weekend
5.6900 6.0050 5.6690 5.9200 941,400
5.5400 5.7250 5.4100 5.7200 1,373,100
5.4600 5.6900 5.4300 5.4400 882,500
5.7200 5.7880 5.1600 5.5200 1,663,900
5.8000 5.8500 5.6250 5.6400 943,200
Weekend
Weekend
6.1600 6.1700 5.5400 5.6400 1,267,500
5.8300 6.2400 5.7100 6.2300 1,250,400
6.2300 6.2900 5.7800 5.9000 1,348,800
6.1800 6.3000 6.0100 6.2200 1,373,700
6.3600 6.4500 6.2100 6.2200 1,252,700
Weekend
Weekend
6.3500 6.4050 6.0950 6.4000 1,606,300
6.3100 6.6950 6.3000 6.3700 2,076,300
6.0000 6.4300 5.9600 6.3600 2,272,900
5.9000 6.0300 5.7600 5.9700 1,269,300
No trading
Weekend
Weekend
5.5600 5.9000 5.5500 5.7900 1,306,100
5.0600 5.5300 5.0350 5.4700 1,615,500
5.0300 5.1900 4.9300 5.1000 1,088,800
5.1900 5.2500 4.9010 5.0600 1,295,400
16 · 8-K After-hours · 16:30 ET FORM 8-K ↗
5.6000 5.6300 5.3100 5.3300 1,270,800
Weekend
Weekend
5.6400 5.7800 5.5000 5.6000 2,023,100
5.3200 6.0550 5.2500 5.8200 2,993,200
5.1500 5.5800 5.0300 5.4000 2,721,300
5.0800 5.3800 5.0250 5.0600 2,543,500
5.0000 5.5450 4.9700 5.1200 2,196,000
Weekend
Weekend
15 · 10-Q After-hours · 16:15 ET 10-Q ↗
5.2050 5.6300 5.0400 5.0400 2,013,100
4.6700 5.5500 4.6100 5.1200 5,397,600
14 · 8-K Pre-market · 06:30 ET FORM 8-K ↗
4.1500 4.1870 4.0200 4.1200 1,844,500
3.9200 4.1400 3.8650 4.1400 1,590,200
4.2500 4.2500 3.8250 3.8800 1,606,800
Weekend
Weekend
3.7500 4.2700 3.7500 4.2700 2,320,100
3.5700 3.7300 3.5600 3.7100 2,153,600
3.6000 3.6350 3.5100 3.6100 778,100
3.5900 3.6350 3.5050 3.6100 1,326,900
3.4800 3.6650 3.4550 3.6400 1,465,600
Weekend
Weekend
3.3300 3.5300 3.2900 3.5000 1,522,200
3.2600 3.4000 3.2200 3.3600 2,148,800
3.5600 3.6400 3.1550 3.2500 2,901,200
13 · 8-K After-hours · 16:30 ET FORM 8-K ↗
3.5800 3.7000 3.4700 3.5500 1,073,800
3.4500 3.5950 3.3800 3.5600 1,165,600
Weekend
Weekend
3.5400 3.7250 3.4200 3.4800 1,676,900
3.3800 3.5300 3.2600 3.5200 1,308,600
3.3000 3.4850 3.3000 3.3300 1,482,600
3.5800 3.5920 3.2200 3.3100 1,371,700
3.3100 3.6750 3.2500 3.5300 1,392,800
Weekend
Weekend
3.8000 3.9800 3.3200 3.3400 2,051,800
3.6700 3.7900 3.4700 3.7400 1,800,500
3.8900 3.9000 3.6450 3.7100 757,300
3.7200 3.8000 3.5450 3.6900 970,400
3.6800 3.9700 3.6800 3.7800 994,100
Weekend
Weekend
No trading
3.3600 3.7290 3.3200 3.6900 1,377,400
3.4700 3.5800 3.4600 3.4700 1,155,100
3.2500 3.4500 3.2300 3.4200 1,087,600
3.3300 3.3700 3.1050 3.1700 2,214,200
Weekend
Weekend
12 · DEFA14A After-hours · 17:02 ET DEFA14A ↗ 11 · DEF 14A After-hours · 16:30 ET DEF 14A ↗
3.3700 3.4400 3.2400 3.3000 773,700
3.4100 3.5350 3.3850 3.4200 798,200
3.2900 3.4450 3.2500 3.4400 820,200
3.1800 3.3000 3.1800 3.2400 830,300
10 · 10-K/A After-hours · 16:48 ET 10-K/A ↗
3.1500 3.2900 3.1150 3.2600 949,600
Weekend
Weekend
3.1900 3.2000 3.0300 3.0600 1,970,100
3.1600 3.2850 3.0900 3.2300 1,199,900
3.2400 3.3900 3.2150 3.2300 1,126,900
3.3800 3.4950 3.2800 3.2900 1,157,700
3.7400 3.7800 3.2750 3.3900 1,111,900
Weekend
Weekend
9 · PRE 14A After-hours · 17:27 ET PRE 14A ↗ 8 · 10-K After-hours · 17:25 ET 10-K ↗
3.6300 3.7500 3.6000 3.6500 1,511,800
3.2400 3.6450 3.2400 3.5900 1,891,600
3.2000 3.3050 3.1900 3.2600 1,329,500
3.1600 3.3550 3.1600 3.2500 1,500,700
3.1800 3.2550 3.0600 3.2100 1,321,200
Weekend
Weekend
3.1900 3.3400 3.1900 3.2200 1,386,200
3.2200 3.3400 3.2200 3.2700 1,742,400
3.3800 3.4300 3.2700 3.3500 1,281,000
3.2000 3.4700 3.1700 3.3400 1,944,700
3.0200 3.4650 3.0200 3.2800 1,882,200
Weekend
Weekend
3.0400 3.2050 2.8750 3.1200 3,895,800
2.6100 3.1700 2.6100 3.1400 2,784,100
2.5800 2.8600 2.3000 2.5700 7,636,700
7 · 8-K Pre-market · 06:30 ET FORM 8-K ↗
3.5600 3.6300 3.4700 3.5600 1,327,300
3.5400 3.6900 3.4900 3.5400 1,060,600
Weekend
Weekend
3.5600 3.7400 3.5600 3.6100 1,495,600
3.4500 3.6600 3.4000 3.6200 1,241,300
3.5500 3.6400 3.4200 3.4900 1,200,500
3.5100 3.6400 3.5000 3.5600 1,428,700
No trading
Weekend
Weekend
3.3500 3.6400 3.3200 3.5300 1,371,300
3.5100 3.5600 3.2950 3.3300 1,010,600
3.5100 3.5850 3.4500 3.5100 921,100
3.5000 3.6000 3.4600 3.4800 954,100
3.4500 3.5290 3.3900 3.4700 1,115,800
Weekend
Weekend
3.1400 3.4850 3.1300 3.4300 1,265,200
3.1800 3.2060 2.9750 3.0800 1,536,900
3.4000 3.4000 3.1520 3.2900 822,200
3.3200 3.4350 3.1900 3.3500 1,565,800
3.3300 3.4100 3.2300 3.2500 1,160,700
Weekend
Weekend
3.5100 3.5750 3.3700 3.3700 1,069,500
3.4600 3.6200 3.3500 3.6100 1,882,300
3.5900 3.6360 3.3400 3.4300 2,487,500
3.5700 3.5950 3.5000 3.5400 840,400
3.7900 3.7900 3.5600 3.5700 1,076,700
Weekend
Weekend
3.9000 3.9100 3.7500 3.8200 1,332,700
3.6600 3.9350 3.6400 3.9000 2,143,300
3.5700 3.6650 3.4850 3.5800 1,418,800
3.3700 3.6750 3.3650 3.5200 1,535,200
No trading
Weekend
Weekend
3.4700 3.5500 3.4200 3.4700 1,840,900
3.4800 3.5550 3.4000 3.4500 1,223,100
3.4400 3.5300 3.3900 3.4600 1,206,500
3.4000 3.5400 3.2800 3.4600 1,334,900
3.3200 3.4600 3.2750 3.3600 1,220,900
Weekend
Weekend
3.3100 3.3550 3.1900 3.3000 1,029,400
3.2100 3.3600 3.1950 3.2900 892,400
3.3200 3.3400 3.1650 3.2400 1,582,500
3.2400 3.4160 3.2400 3.3300 2,242,400
2.9200 3.2500 2.9200 3.2400 2,809,500
Weekend
Weekend
2.8600 2.9700 2.8000 2.8900 2,293,800
No trading
2.9200 3.0000 2.7950 2.8300 2,772,400
2.9500 3.0450 2.9100 2.9500 7,043,100
2.8900 3.0050 2.8800 2.9700 2,232,500
Weekend
Weekend
2.9500 2.9900 2.8750 2.9400 1,230,200
No trading
2.9400 3.0000 2.9200 2.9700 698,100
2.9400 3.0000 2.9150 2.9500 1,829,000
2.9900 3.0800 2.8800 2.9100 1,369,700
Weekend
Weekend
2.9100 2.9800 2.8600 2.9600 2,707,400
3.0000 3.0930 2.8700 2.9000 1,673,600
6 · 8-K Next filing day · accepted 17 Dec, 18:35 ET FORM 8-K ↗
3.1000 3.1450 2.9300 2.9400 2,006,600
3.1000 3.1700 3.0150 3.0800 1,565,800
3.2500 3.2500 3.1000 3.1100 1,308,100
Weekend
Weekend
3.4000 3.4100 3.2000 3.2200 1,047,600
3.2800 3.3700 3.2400 3.3700 1,184,000
3.2600 3.3450 3.2000 3.3000 1,594,900
3.2100 3.3300 3.2100 3.3000 1,625,400
3.5700 3.5700 3.2700 3.2900 1,710,400
Weekend
Weekend
3.5900 3.6500 3.5200 3.5400 1,887,500
3.5000 3.7300 3.4150 3.6300 2,561,900
3.4500 3.4800 3.3950 3.4800 1,533,400
3.4000 3.5200 3.3500 3.4200 2,133,000
3.1600 3.5450 3.1300 3.3600 2,455,400
Weekend
Weekend
3.1800 3.2650 3.1400 3.2200 1,590,500
No trading
3.2100 3.2600 3.1150 3.1600 1,298,400
3.1300 3.2200 3.0900 3.2100 1,344,900
3.0600 3.1300 3.0100 3.1300 2,119,600
Weekend
Weekend
2.9400 3.1500 2.9200 3.1000 2,849,800
3.1200 3.2000 2.9300 2.9300 2,446,700
3.1500 3.1600 3.0100 3.0800 2,342,500
3.0400 3.1850 2.9800 3.1200 2,791,700
3.0500 3.2350 3.0200 3.0600 3,002,100
Weekend
Weekend
3.0200 3.1600 3.0100 3.0800 4,281,700
3.3300 3.4200 3.1450 3.2200 4,254,900
3.6300 3.6900 3.4100 3.4300 2,654,500
3.6600 3.6780 3.4700 3.6200 3,579,000
4.0000 4.0200 3.6600 3.6700 4,676,500
Weekend
Weekend
3.8600 4.0100 3.7000 3.8600 9,068,900
5 · 10-Q After-hours · 17:01 ET 10-Q ↗
5.0650 5.4500 4.0850 4.1100 14,122,400
4 · 8-K Pre-market · 06:30 ET FORM 8-K ↗
7.1900 7.4600 7.1500 7.4100 1,752,200
7.4500 7.5800 7.1500 7.1900 2,044,000
8.1600 8.2350 7.6900 7.7500 1,685,900
Weekend
Weekend
8.0000 8.5600 7.8100 8.1400 3,377,900
7.7400 7.7900 7.5200 7.5300 1,175,400
8.0000 8.1000 7.7200 7.9000 1,461,300
8.0800 8.1750 7.9300 7.9900 1,043,000
8.5800 8.6400 7.9700 8.1300 1,819,600
Weekend
Weekend
8.3900 8.5700 8.2500 8.5000 1,406,000
7.9100 8.1500 7.8600 8.1500 1,177,700
7.8500 8.0500 7.6150 7.8100 1,862,200
8.3300 8.3300 7.8800 7.9200 1,955,200
8.1400 8.4100 8.0630 8.3100 1,141,600
Weekend
Weekend
8.1500 8.1700 7.8200 7.9400 1,708,200
9.1500 9.3480 8.2600 8.3100 3,127,300
8.4800 9.0100 8.3200 8.8200 2,525,100
8.0500 8.3250 7.7800 8.0900 2,404,600
8.1300 8.7350 8.1300 8.4600 2,024,700
Weekend
Weekend
8.0500 8.4400 7.8400 7.9700 3,863,300
8.2900 8.3400 7.8720 7.9500 1,522,000
8.1800 8.4450 8.0600 8.3100 1,975,600
8.7200 8.7920 7.8800 8.0600 2,255,600
8.5000 9.0250 8.4000 8.7000 3,729,200
Weekend
Weekend
7.5280 8.0100 7.5200 7.7600 2,400,300
7.3500 7.4100 7.0700 7.2100 1,363,400
6.8900 7.3800 6.8600 7.3000 1,386,100
7.0300 7.0850 6.8100 6.9600 1,399,100
7.2100 7.2150 6.9450 7.0800 1,770,300
Weekend
Weekend
6.8500 7.1500 6.8000 7.1000 1,159,000
6.8300 6.9550 6.7500 6.8700 1,143,200
7.1500 7.3000 6.9800 6.9800 958,300
7.3200 7.6900 7.0700 7.1200 1,837,300
6.7800 7.3000 6.5950 7.2800 1,841,800
Weekend
Weekend
7.0000 7.0900 6.7550 6.8400 2,030,900
6.7800 7.0600 6.6100 6.9800 1,342,000
6.7000 6.9850 6.4900 6.6000 1,541,900
6.7600 6.9000 6.6700 6.7000 929,300
6.7100 6.8090 6.5350 6.7100 1,651,300
Weekend
Weekend
6.8400 6.8400 6.5800 6.5900 1,343,100
3 · 8-K After-hours · 16:15 ET 8-K ↗
6.2100 6.8250 6.1810 6.8000 2,264,700
6.6100 6.6900 6.2250 6.2700 2,241,200
6.7300 6.7500 6.4850 6.6600 1,594,000
6.6300 6.8400 6.5100 6.7600 1,908,200
Weekend
Weekend
6.4600 6.8150 6.3950 6.6100 1,845,500
6.6900 6.7000 6.2900 6.3500 1,203,600
6.6200 6.7450 6.5900 6.6700 973,200
6.6800 6.7700 6.4200 6.6600 1,404,800
No trading
Weekend
Weekend
6.9600 7.0400 6.7800 6.8400 1,079,300
7.1000 7.1000 6.8710 6.9600 1,338,800
7.1000 7.2300 6.9900 7.0200 1,086,700
7.0500 7.2050 6.9900 7.1200 1,281,200
7.0000 7.0350 6.8800 6.9300 908,800
Weekend
Weekend
6.7100 7.0400 6.6700 7.0100 1,652,900
6.6000 6.7150 6.4500 6.6400 1,224,300
6.8000 6.9700 6.6150 6.6800 1,514,100
7.1000 7.1200 6.7900 6.8400 1,897,800
7.2900 7.3750 7.1000 7.1100 1,280,200
Weekend
Weekend
7.1000 7.3850 7.0600 7.2500 2,066,300
7.2600 7.3170 7.0250 7.0600 1,684,600
7.6000 7.7650 7.3300 7.4700 2,482,800
6.9500 7.5900 6.8850 7.4200 2,303,700
7.1200 7.1400 6.5760 6.9500 4,793,500
Weekend
Weekend
7.4300 7.6900 7.1300 7.5500 3,919,100
2 · 10-Q After-hours · 16:37 ET 10-Q ↗
8.9300 9.7800 7.5050 7.5700 7,998,500
1 · 8-K Pre-market · 06:30 ET FORM 8-K ↗
8.2300 8.5200 8.0300 8.2400 6,136,500
7.9800 8.3900 7.8550 8.2600 2,379,000
7.6700 7.9900 7.6000 7.8800 1,529,500
Weekend
Weekend
7.4300 7.6800 7.1800 7.6000 2,398,400
7.8100 8.0750 7.5250 7.6600 2,131,100
7.8000 8.3400 7.7050 7.9000 3,523,500
7.6800 8.0590 7.3550 7.8000 3,612,900
7.9400 7.9870 7.6800 7.7300 1,473,800
Weekend
Weekend
7.9000 7.9000 7.6250 7.7700 1,537,800
8.0900 8.1000 7.5500 7.7800 2,199,800
7.8500 8.3700 7.7200 8.1500 3,848,400
7.5600 7.8800 7.4000 7.7700 2,758,200

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.

16 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
15 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
14 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 06:30 ET Summarise
13 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
12 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 17:02 ET Summarise
11 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
10 10-K/A 10-K/A (opens SEC filing in a new tab) After-hours · 16:48 ET Summarise
9 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 17:27 ET Summarise
8 10-K 10-K (opens SEC filing in a new tab) After-hours · 17:25 ET Summarise
7 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 06:30 ET Summarise
6 8-K FORM 8-K (opens SEC filing in a new tab) Next filing day · accepted 17 Dec, 18:35 ET Summarise
5 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:01 ET Summarise
4 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 06:30 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:37 ET Summarise
1 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 06:30 ET Summarise