Arq, Inc ARQ

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Arq, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 2.0300 · FX 1 USD = 1.288650 SGD · about SGD 2.6160 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 5.73 → 2.03 · -64.6%
7.7304.6851.640 1 2,3 4 5,6 7 8 9 10,11 12 13,14 15,16 17 18,19 20 21 22 23 24 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
2.0200 2.0700 2.0100 2.0300 140,900
24 · 8-K After-hours · 17:09 ET 8-K ↗
2.0300 2.0700 1.9900 2.0400 192,300
2.0700 2.1500 2.0400 2.0800 220,100
2.0900 2.1500 2.0500 2.0700 382,600
2.0600 2.1300 1.9300 2.0900 424,000
Weekend
Weekend
2.1400 2.1600 2.0600 2.0600 202,600
2.2100 2.2100 2.1600 2.1800 109,400
2.2200 2.3000 2.1800 2.2000 100,500
2.2300 2.3600 2.1900 2.2200 103,100
2.3200 2.3400 2.1600 2.2200 280,500
Weekend
Weekend
2.2400 2.3600 2.2400 2.3200 262,800
2.2200 2.2500 2.2000 2.2500 116,400
2.2100 2.2600 2.1300 2.2100 199,000
2.2200 2.2600 2.1200 2.2100 464,900
2.2900 2.4200 2.2100 2.2200 220,600
Weekend
Weekend
No trading
23 · 8-K After-hours · 16:33 ET 8-K ↗
2.3500 2.4100 2.2700 2.2700 256,200
2.5500 2.6000 2.3500 2.3500 242,800
2.5200 2.6200 2.3000 2.5500 266,000
2.3500 2.5300 2.3200 2.5000 335,200
Weekend
Weekend
2.2600 2.4100 2.2600 2.3400 3,317,400
2.3800 2.4300 2.2300 2.2800 721,900
2.4600 2.5100 2.2800 2.3500 529,300
2.5400 2.6000 2.4200 2.4600 334,100
2.7900 2.8300 2.5600 2.5800 340,200
Weekend
Weekend
No trading
22 · 8-K After-hours · 16:31 ET 8-K ↗
2.7500 2.9000 2.7400 2.8400 657,900
2.8000 2.8300 2.7000 2.7300 435,300
2.7300 2.8600 2.7200 2.7700 304,700
2.7300 2.8600 2.7000 2.7200 513,900
Weekend
Weekend
2.6800 2.7800 2.6100 2.6800 271,100
21 · 8-K After-hours · 16:31 ET 8-K ↗
2.7000 2.7400 2.6200 2.6600 215,900
2.6900 2.7600 2.6600 2.6700 276,300
2.6700 2.8000 2.6200 2.6900 281,400
2.6100 2.6800 2.5800 2.6500 160,100
Weekend
Weekend
2.6600 2.6900 2.5800 2.6000 273,800
2.6000 2.7100 2.5600 2.6600 255,600
2.6800 2.7300 2.6000 2.6000 240,200
2.7500 2.7900 2.6700 2.7300 208,300
2.7700 2.8600 2.7400 2.7900 404,200
Weekend
Weekend
2.7500 2.8500 2.7200 2.7600 285,300
2.7300 2.8000 2.6500 2.7500 315,200
20 · 8-K After-hours · 16:32 ET 8-K ↗
2.4500 2.7000 2.4500 2.6800 251,700
2.4800 2.5500 2.3900 2.4900 369,300
No trading
Weekend
Weekend
2.4800 2.4800 2.4200 2.4600 196,100
2.5100 2.5100 2.4000 2.4800 196,700
2.5100 2.5600 2.4800 2.5300 152,400
2.5300 2.5600 2.5000 2.5400 167,900
2.6200 2.6200 2.5100 2.5800 147,300
Weekend
Weekend
2.6000 2.6900 2.5600 2.6200 174,500
2.5500 2.7600 2.4500 2.6300 522,300
2.7000 2.7300 2.5400 2.5500 211,400
2.7200 2.7300 2.6100 2.7100 199,500
2.6800 2.7800 2.6500 2.7300 394,000
Weekend
Weekend
2.5800 2.7700 2.4800 2.6400 384,400
2.3500 2.6900 2.3400 2.5900 668,300
19 · 8-K After-hours · 16:33 ET 8-K ↗ 18 · 10-Q After-hours · 16:30 ET 10-Q ↗
2.3700 2.3900 2.2300 2.3100 544,000
2.4600 2.5000 2.3100 2.3700 460,300
2.2700 2.4700 2.2700 2.4500 445,500
Weekend
Weekend
17 · 8-K After-hours · 16:56 ET 8-K ↗
2.2600 2.3300 2.2600 2.2900 245,200
2.2000 2.3200 2.1500 2.2700 366,200
2.2400 2.2700 2.1900 2.2300 150,700
16 · DEFA14A After-hours · 16:37 ET DEFA14A ↗ 15 · DEF 14A After-hours · 16:34 ET DEF 14A ↗
2.2700 2.3300 2.2200 2.2700 209,400
2.2800 2.3100 2.2700 2.2800 202,100
Weekend
Weekend
2.2800 2.3500 2.2600 2.2900 205,600
2.2100 2.3100 2.2000 2.3000 262,200
2.2200 2.2600 2.2100 2.2300 260,300
2.2400 2.2700 2.1900 2.2200 238,700
2.2100 2.2700 2.1800 2.2400 209,800
Weekend
Weekend
14 · PRE 14A After-hours · 16:32 ET PRE 14A ↗ 13 · 8-K After-hours · 16:31 ET 8-K ↗
2.2800 2.3200 2.2100 2.2300 457,900
2.3700 2.3700 2.2600 2.2700 414,900
2.3200 2.3800 2.2500 2.3600 377,800
2.1300 2.2600 2.1100 2.2400 652,100
2.1400 2.1800 2.1000 2.1200 432,300
Weekend
Weekend
2.1200 2.2000 2.1100 2.1700 456,500
2.2800 2.3200 2.1000 2.1200 669,800
2.5000 2.5000 2.2900 2.2900 363,400
2.4300 2.4800 2.3400 2.3900 309,300
2.4700 2.5400 2.4600 2.4700 366,400
Weekend
Weekend
No trading
2.3200 2.4900 2.2600 2.4700 1,017,100
2.5800 2.5900 2.3200 2.3600 621,900
12 · 8-K Pre-market · 08:00 ET 8-K ↗
2.4900 2.6000 2.4300 2.5600 497,100
2.5000 2.5600 2.4200 2.4900 418,100
Weekend
Weekend
2.4500 2.6100 2.3700 2.5400 555,100
2.4600 2.7200 2.4600 2.5000 983,000
2.4300 2.5800 2.4000 2.5000 1,441,300
2.2500 2.3800 2.2400 2.3300 703,800
1.9800 2.3000 1.9700 2.2700 1,632,800
Weekend
Weekend
2.0900 2.0900 1.9800 1.9900 731,100
1.8800 2.0900 1.8200 2.0700 1,057,700
1.9600 2.0300 1.8800 1.9000 1,386,900
1.9500 1.9900 1.8700 1.8900 867,400
1.9500 1.9600 1.8600 1.8800 986,600
Weekend
Weekend
2.0500 2.0500 1.9000 1.9200 1,365,900
1.7400 2.1000 1.7200 2.0400 3,095,400
1.6500 1.7800 1.6200 1.7800 4,510,100
2.0100 2.0300 1.5400 1.6400 15,252,400
11 · 10-K Next filing day · accepted 09 Mar, 19:22 ET 10-K ↗ 10 · 8-K Next filing day · accepted 09 Mar, 19:10 ET 8-K ↗
3.1500 3.2400 3.0900 3.2000 693,900
Weekend
Weekend
3.3300 3.3400 3.1700 3.2100 417,200
3.4600 3.5000 3.3300 3.4000 195,600
3.5200 3.6300 3.4400 3.5000 298,000
9 · 8-K After-hours · 17:06 ET 8-K ↗
3.4000 3.5600 3.3100 3.4800 246,800
3.4400 3.5700 3.4300 3.5000 208,900
Weekend
Weekend
3.5600 3.6900 3.4300 3.5100 353,100
3.5500 3.6500 3.4200 3.6200 282,700
3.4600 3.6200 3.3800 3.5700 277,500
3.3600 3.4500 3.3600 3.4100 126,100
3.4600 3.4600 3.2900 3.3600 219,500
Weekend
Weekend
3.5000 3.5300 3.4000 3.4600 154,600
3.4300 3.5300 3.3800 3.5300 284,000
3.4100 3.5000 3.3600 3.4600 194,400
3.5800 3.5800 3.3600 3.4100 321,200
No trading
Weekend
Weekend
3.6200 3.6400 3.4500 3.5900 410,900
3.8000 3.8300 3.5100 3.6200 351,200
3.8900 3.9100 3.7700 3.8000 206,100
3.7600 3.9200 3.6900 3.8500 304,400
3.5400 3.8100 3.5400 3.7600 393,600
Weekend
Weekend
3.5900 3.6700 3.5100 3.5200 308,000
3.7200 3.7700 3.4900 3.5300 270,800
3.5600 3.8500 3.5100 3.7500 432,600
3.6300 3.7100 3.4700 3.5400 238,100
3.5500 3.6500 3.4900 3.6100 310,600
Weekend
Weekend
3.6200 3.6500 3.5000 3.5600 327,000
8 · 8-K After-hours · 16:34 ET 8-K ↗
3.7400 3.7500 3.5600 3.6500 186,200
3.8100 3.9400 3.7100 3.7400 171,200
3.8400 3.8600 3.7000 3.7900 277,100
3.8000 4.0200 3.7800 3.8100 304,100
Weekend
Weekend
3.7200 3.8300 3.7000 3.7900 230,000
3.6800 3.8000 3.6800 3.7300 347,900
3.5500 3.6700 3.5200 3.6700 375,600
3.5300 3.6600 3.5000 3.5500 266,700
No trading
Weekend
Weekend
3.6400 3.7200 3.5800 3.6300 404,300
3.6200 3.7300 3.5900 3.6300 243,500
3.6600 3.7000 3.6000 3.6200 259,100
3.8300 3.8700 3.6200 3.6600 268,000
3.6000 3.9900 3.5800 3.8200 434,700
Weekend
Weekend
3.6800 3.7500 3.5700 3.6000 363,200
3.5200 3.7600 3.5200 3.6600 263,800
3.5400 3.6200 3.5000 3.5600 230,200
3.5500 3.5500 3.4600 3.5400 249,000
3.3800 3.6000 3.3600 3.5400 423,600
Weekend
Weekend
3.3000 3.4100 3.2600 3.3300 390,200
No trading
3.2300 3.2900 3.1800 3.2700 364,100
3.3000 3.4200 3.2200 3.2300 437,600
3.3700 3.4200 3.2900 3.3000 384,400
Weekend
Weekend
3.5000 3.5000 3.2700 3.4100 278,300
No trading
3.2800 3.4300 3.2600 3.4100 168,000
3.2300 3.3400 3.2100 3.2800 443,900
3.2500 3.3800 3.2400 3.2400 574,200
Weekend
Weekend
3.3100 3.3200 3.2000 3.2000 545,300
3.2800 3.3400 3.2500 3.3100 451,000
3.3000 3.3700 3.1900 3.2200 461,100
3.3200 3.4100 3.2300 3.2900 843,000
3.3700 3.3800 3.2700 3.3000 489,300
Weekend
Weekend
3.6000 3.6100 3.3500 3.3500 736,600
7 · 8-K After-hours · 17:16 ET 8-K ↗
3.6500 3.7300 3.6000 3.6000 415,900
3.6400 3.7000 3.5700 3.6600 415,400
3.6700 3.7400 3.6500 3.6600 247,500
3.8100 3.8100 3.6200 3.6800 250,100
Weekend
Weekend
3.8300 3.8900 3.7600 3.7700 189,400
3.9000 3.9200 3.7100 3.8400 452,900
3.8200 3.9300 3.7800 3.9100 345,700
3.6800 3.8600 3.6700 3.8200 534,000
3.6500 3.7800 3.6400 3.6800 421,100
Weekend
Weekend
3.7400 3.7400 3.6800 3.7200 133,600
No trading
3.6200 3.7400 3.5900 3.6900 337,400
3.5200 3.6200 3.4800 3.6100 345,400
3.5500 3.5800 3.4200 3.5100 528,100
Weekend
Weekend
3.2700 3.5300 3.2700 3.5000 634,200
3.5600 3.6300 3.2700 3.3000 518,800
3.4900 3.5500 3.4600 3.5000 532,900
3.5100 3.6000 3.4500 3.5100 672,100
3.5300 3.6500 3.4600 3.5100 722,800
Weekend
Weekend
3.5500 3.6400 3.5000 3.5300 547,500
3.7700 3.9500 3.5400 3.5700 945,900
3.7900 4.0300 3.7000 3.7000 862,800
3.6500 3.7000 3.4600 3.4700 676,900
3.8900 4.0300 3.6600 3.6600 712,300
Weekend
Weekend
4.0400 4.0800 3.6500 3.8500 1,054,100
4.8100 4.8800 4.0800 4.1000 2,103,200
6 · 8-K After-hours · 16:36 ET 8-K ↗ 5 · 10-Q After-hours · 16:32 ET 10-Q ↗
6.4100 6.4900 6.2100 6.3500 235,700
6.5200 6.6000 6.3900 6.4100 134,200
6.6900 6.7300 6.5100 6.6000 143,800
Weekend
Weekend
6.6600 6.8100 6.6000 6.6400 96,400
6.5700 6.7500 6.5100 6.6800 125,400
6.8700 6.9500 6.6300 6.6600 130,400
6.9500 7.0000 6.7800 6.8700 151,200
7.0300 7.0300 6.8600 6.9400 104,000
Weekend
Weekend
6.9900 7.0700 6.8800 6.9900 143,000
6.7400 6.8800 6.7300 6.8600 138,800
6.9800 7.0300 6.6500 6.7400 130,700
6.9800 7.0000 6.7800 6.9900 193,300
6.8000 7.1400 6.7000 7.0000 233,600
Weekend
Weekend
6.8800 7.0000 6.6800 6.7000 200,900
7.0600 7.1300 6.8600 6.9100 198,700
7.1900 7.2400 6.9000 7.0200 220,300
7.2000 7.3700 7.1100 7.1800 291,500
6.9000 7.2300 6.8100 7.2100 321,900
Weekend
Weekend
6.7900 7.0800 6.7100 6.7300 212,300
7.0200 7.0200 6.7400 6.8000 144,200
7.0600 7.1600 6.9800 7.0100 212,100
7.0200 7.1800 6.9600 7.0700 170,900
7.0200 7.1800 6.9600 7.0200 254,100
Weekend
Weekend
7.1000 7.3300 6.9300 7.0000 202,000
7.0700 7.1100 6.9100 7.0700 156,900
7.1100 7.2900 7.0500 7.0700 251,800
7.1800 7.2500 7.0600 7.1600 222,900
7.2000 7.4100 7.1100 7.2000 284,300
Weekend
Weekend
7.3500 7.4000 7.1300 7.1600 262,600
7.1900 7.7000 7.1400 7.4000 340,600
7.2100 7.4000 7.1500 7.1900 179,600
7.2500 7.3300 7.1500 7.2000 272,100
7.2900 7.4700 7.1800 7.2100 261,900
Weekend
Weekend
7.1500 7.4400 7.1500 7.3600 557,900
7.2600 7.5000 6.6100 7.0000 1,063,400
7.2200 7.3500 7.1500 7.1900 217,100
7.4000 7.6000 7.1500 7.1700 258,100
7.2100 7.4500 7.2000 7.4000 206,300
Weekend
Weekend
7.0500 7.2000 6.9400 7.1700 151,300
6.9200 7.1300 6.9200 7.0600 166,900
7.0600 7.1100 6.9000 6.9700 132,200
7.2400 7.2400 6.9600 7.0400 134,800
7.1000 7.3500 7.0000 7.2700 254,500
Weekend
Weekend
7.2700 7.3600 7.0000 7.0800 308,500
7.2000 7.2900 7.1000 7.2000 284,100
7.2200 7.4100 7.0100 7.1800 399,600
7.5900 7.7400 7.2600 7.3000 321,600
No trading
Weekend
Weekend
7.7300 7.8200 7.5700 7.7200 305,200
7.6200 7.7900 7.5700 7.6400 350,400
7.3300 7.6300 7.2900 7.6100 386,700
7.3600 7.4300 7.2700 7.3500 317,800
7.3700 7.5700 7.3200 7.3600 265,000
Weekend
Weekend
7.0700 7.5700 7.0600 7.3900 379,100
6.9500 7.1600 6.8200 7.1200 181,200
6.9900 7.1100 6.9300 7.0100 201,700
7.1600 7.2700 7.0300 7.0700 244,900
7.3500 7.5700 7.1800 7.1900 195,400
Weekend
Weekend
7.4000 7.4000 7.1500 7.3500 265,100
4 · 8-K/A After-hours · 16:37 ET 8-K/A ↗
7.6000 7.8100 7.3200 7.3600 305,000
7.2800 7.8900 7.2300 7.7300 809,100
6.4900 7.2300 6.0000 7.2000 876,000
3 · 8-K After-hours · 16:32 ET 8-K ↗ 2 · 10-Q After-hours · 16:31 ET 10-Q ↗
6.6200 6.7400 6.4000 6.5400 305,700
Weekend
Weekend
6.2400 6.7000 6.1700 6.6200 259,300
6.7000 6.7000 6.1700 6.1900 439,600
5.9300 6.7500 5.9300 6.6900 880,200
1 · 8-K Pre-market · 08:01 ET 8-K ↗
5.4500 5.6400 5.3200 5.4100 127,200
5.2000 5.5200 5.2000 5.4700 172,000
Weekend
Weekend
5.2300 5.3800 5.1400 5.1600 142,500
5.3100 5.3800 5.1100 5.3500 166,700
5.5500 5.6700 5.2600 5.3200 297,400
5.8000 5.8000 5.5100 5.5200 112,000
5.8000 5.8400 5.6200 5.7300 100,400
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.

24 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:09 ET Summarise
23 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:33 ET Summarise
22 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
21 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
20 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:33 ET Summarise
18 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:56 ET Summarise
16 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:37 ET Summarise
15 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:34 ET Summarise
14 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:00 ET Summarise
11 10-K 10-K (opens SEC filing in a new tab) Next filing day · accepted 09 Mar, 19:22 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 09 Mar, 19:10 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:06 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:34 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:16 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:36 ET Summarise
5 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
4 8-K/A 8-K/A (opens SEC filing in a new tab) After-hours · 16:37 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:01 ET Summarise