System1, Inc. Class A SST

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System1, Inc. Class A Common Stock · Company · NYSE

Paper trade (simulated — no real money)

Fill: USD 2.0900 · FX 1 USD = 1.277900 SGD · about SGD 2.6708 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 5.95 → 2.09 · -64.9%
6.1803.7751.370 1,2,3 4 5 6 7,8,9 10 11,12,13 14 15 16 17 18 19,20,21 Oct 25Jan 26Apr 26Jul 26Oct 26

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

Price & SEC Filing History 23 Oct 2025 — 24 Oct 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.

Weekend
2.1500 2.2000 2.0425 2.0900 29,024
2.1000 2.2200 2.0500 2.1500 28,400
2.1200 2.2190 2.0850 2.1700 45,100
2.0400 2.1300 2.0000 2.1000 33,200
2.1100 2.1500 1.8900 2.0400 83,000
Weekend
Weekend
2.3200 2.4490 2.0600 2.1000 119,400
2.0600 2.3100 2.0250 2.2300 58,200
2.1200 2.2100 2.0200 2.0800 45,200
2.1300 2.2350 2.1200 2.1600 29,800
2.3200 2.3300 2.0430 2.1900 97,100
Weekend
Weekend
2.3100 2.4420 2.2870 2.3400 53,500
2.3100 2.4700 2.2600 2.2700 45,900
2.3200 2.4700 2.2900 2.3500 47,000
2.3100 2.4900 2.3000 2.3600 103,700
2.4500 2.4500 2.3000 2.3000 92,600
Weekend
Weekend
2.6400 2.6500 2.3500 2.4400 87,400
2.6300 2.7150 2.5450 2.6400 66,900
2.7200 2.7500 2.6000 2.6200 41,400
2.7500 2.8700 2.6100 2.7000 122,700
2.8500 2.9810 2.7070 2.7100 121,400
Weekend
Weekend
3.0900 3.1100 2.8000 2.8200 185,400
3.1500 3.2700 3.0000 3.0800 257,200
3.4600 3.7000 3.0800 3.1400 332,100
3.9300 4.1500 3.3900 3.4700 242,600
3.3000 4.3770 3.2210 3.8800 834,900
Weekend
Weekend
3.2400 3.5300 3.0600 3.3300 339,600
3.1300 3.2400 3.0610 3.2200 134,800
3.3100 3.3100 3.0400 3.1000 166,700
3.2500 3.3500 3.1500 3.3200 196,700
3.4100 3.5100 3.2050 3.2600 290,300
Weekend
Weekend
3.7500 4.1780 3.4100 3.4200 372,100
4.2500 4.7000 3.7300 3.8400 653,400
5.0500 5.1480 4.3000 4.4100 1,010,000
4.0400 5.4500 3.8110 5.0000 6,187,000
No trading
Weekend
Weekend
4.0000 4.4500 3.4200 3.8300 2,013,400
3.2500 3.8700 3.1610 3.7600 2,124,200
2.7300 3.3000 2.6800 3.0100 1,773,400
2.5000 2.8500 2.2800 2.8400 2,198,900
1.9600 2.6300 1.9100 2.2400 9,173,500
Weekend
Weekend
1.8200 1.9200 1.8110 1.8900 41,000
1.8900 1.9400 1.8200 1.8600 57,100
1.8500 2.0100 1.8450 1.8500 91,900
1.9100 1.9350 1.7500 1.8900 89,900
1.9700 2.0000 1.7900 1.9300 139,300
Weekend
Weekend
1.9200 2.0550 1.8810 1.9300 30,200
2.0100 2.0700 1.8510 1.9400 47,500
2.0400 2.1400 1.9800 2.0600 55,800
2.2200 2.3100 1.9200 2.0400 135,900
2.3000 2.6810 2.1060 2.2100 350,400
Weekend
Weekend
1.7300 2.4100 1.7300 2.3500 3,435,400
1.8600 1.9400 1.6700 1.7000 110,300
1.7100 2.0000 1.6550 1.8900 154,200
1.6900 1.7300 1.6300 1.7000 61,100
1.6600 1.7600 1.6600 1.7000 45,500
Weekend
Weekend
1.7000 1.7510 1.6050 1.6700 55,900
1.6500 1.6900 1.6000 1.6600 43,700
21 · 8-K After-hours · 16:59 ET 8-K ↗ 20 · 10-Q After-hours · 16:21 ET 10-Q ↗ 19 · 8-K After-hours · 16:05 ET 8-K ↗
1.9900 2.0000 1.6800 1.6800 79,400
18 · S-3 After-hours · 17:19 ET S-3 ↗
1.8300 2.0600 1.7900 2.0100 66,500
1.7100 1.8000 1.7000 1.7600 30,400
Weekend
Weekend
1.7800 1.8500 1.6910 1.7400 15,100
1.7500 1.8000 1.7060 1.7700 30,100
1.7800 1.8450 1.7110 1.7400 28,800
1.9000 1.9200 1.7700 1.8300 55,800
1.8000 1.9800 1.8000 1.9100 58,400
Weekend
Weekend
1.8500 2.1200 1.8000 1.8300 201,200
17 · 8-K Pre-market · 09:07 ET 8-K ↗
1.7700 1.8400 1.6510 1.8100 35,100
1.7500 1.8500 1.7200 1.8000 60,400
1.7000 1.7930 1.6300 1.7400 106,700
1.7500 1.8150 1.4400 1.7500 694,800
Weekend
Weekend
1.8600 1.9000 1.7500 1.7600 84,600
2.5200 2.5600 1.9100 1.9100 269,800
2.6200 2.6650 2.5200 2.5400 15,000
2.5900 2.7000 2.5300 2.6000 24,100
2.7100 2.7650 2.5800 2.6100 29,100
Weekend
Weekend
2.6000 2.7400 2.5000 2.6600 16,500
2.5400 2.6500 2.5160 2.6000 24,300
2.5070 2.6600 2.5000 2.5600 24,100
2.7500 2.7900 2.5100 2.5700 37,400
2.5400 2.8700 2.4100 2.8100 78,400
Weekend
Weekend
No trading
2.5600 2.5600 2.2500 2.5000 109,800
2.3600 2.6000 2.3600 2.5400 56,600
2.4200 2.5250 2.3100 2.3100 32,900
2.5400 2.6000 2.3550 2.4200 84,400
Weekend
Weekend
2.2700 2.5920 2.2700 2.5100 139,000
2.3900 2.4600 2.2600 2.2800 57,400
2.6900 2.7900 2.3650 2.3800 119,200
2.7900 2.8750 2.6650 2.7400 34,800
16 · DEF 14A After-hours · 17:17 ET DEF 14A ↗
2.8100 2.8900 2.7600 2.7600 38,600
Weekend
Weekend
No trading
3.1000 3.1000 2.8100 2.8500 33,600
3.1000 3.1800 2.9900 3.0500 80,100
2.8600 3.1200 2.7500 3.1200 200,900
3.0000 3.0650 2.8800 2.8800 64,300
Weekend
Weekend
3.0600 3.1800 2.9500 2.9800 45,300
3.0800 3.1800 2.9700 3.0800 56,600
15 · PRE 14A Next filing day · accepted 10 Jun, 18:36 ET PRE 14A ↗
2.9700 3.1200 2.9500 3.0600 65,400
3.1000 3.2190 3.0100 3.0200 65,500
3.0700 3.2200 3.0000 3.0800 42,000
Weekend
Weekend
3.3400 3.3400 3.0300 3.0500 87,500
3.2400 3.5000 3.1000 3.3700 115,600
3.4600 3.4630 3.1100 3.3200 103,500
3.4700 3.8800 3.3300 3.5300 220,100
3.0000 3.7800 2.9010 3.5100 635,800
14 · 8-K Pre-market · 09:00 ET 8-K ↗
Weekend
Weekend
2.8500 3.0000 2.7900 2.9900 152,300
2.8700 3.0100 2.7950 2.8700 173,200
2.7700 2.9190 2.7100 2.8900 82,800
2.9200 3.0600 2.7500 2.8400 272,300
No trading
Weekend
Weekend
2.5700 2.9900 2.5700 2.9500 246,600
2.6100 2.7600 2.4300 2.5700 305,500
2.8000 2.8790 2.5400 2.5700 177,000
2.8700 2.9500 2.7500 2.8000 186,500
3.0200 3.1000 2.8800 2.9200 202,000
Weekend
Weekend
3.2000 3.3290 2.8900 3.0200 365,800
3.4300 3.4960 3.1600 3.1800 462,900
3.2600 3.8800 3.2500 3.5300 984,700
13 · 8-K After-hours · 16:27 ET 8-K ↗ 12 · 10-Q After-hours · 16:16 ET 10-Q ↗ 11 · 8-K After-hours · 16:05 ET 8-K ↗
3.8300 5.1990 3.8100 4.4500 1,532,300
3.7300 4.2000 3.6000 3.8300 405,800
Weekend
Weekend
3.8000 4.0500 3.4100 3.9200 527,400
4.3000 4.3490 3.9000 3.9200 557,100
4.2400 4.6790 4.1100 4.4600 1,504,300
3.6900 3.9800 3.4600 3.9800 698,400
3.5100 3.7800 3.3500 3.7100 902,400
Weekend
Weekend
3.6900 4.3000 3.6100 3.9400 10,177,500
10 · 10-K/A After-hours · 16:10 ET 10-K/A ↗
3.4100 3.5700 3.1500 3.2400 497,800
3.8600 3.8600 3.4370 3.6700 436,900
3.8200 4.0500 3.5600 3.9500 635,300
3.8000 4.3500 3.6600 4.0200 1,554,600
Weekend
Weekend
4.7000 4.9700 3.7800 3.9000 8,779,500
3.0000 4.3300 2.7500 3.8300 29,897,700
2.6300 2.8700 2.5500 2.8000 789,800
2.8400 2.9200 2.4400 2.6100 1,089,700
2.4500 3.6000 2.4000 2.6800 11,303,700
Weekend
Weekend
2.2400 2.2990 2.1000 2.1500 202,100
2.1000 2.4580 2.1000 2.2600 533,000
2.1800 2.2600 2.0100 2.1100 300,100
2.4100 2.4430 2.0500 2.2600 344,600
2.5100 2.6000 2.2200 2.4100 621,400
Weekend
Weekend
2.6400 3.0500 2.4500 2.5600 769,900
3.0700 3.0700 2.3950 2.5000 693,400
3.5600 3.6490 2.8000 3.0400 634,400
3.6900 3.8980 3.4200 3.5100 531,300
3.4000 4.1800 3.3600 3.7000 1,330,000
Weekend
Weekend
No trading
4.3500 5.6000 3.4540 3.5700 2,677,200
3.1900 5.8000 3.1200 5.2200 17,563,500
4.0400 4.1700 2.7900 3.0200 5,808,800
3.1800 4.4700 3.0000 3.1400 14,332,000
Weekend
Weekend
1.4100 4.7500 1.4100 3.3200 89,537,900
1.4600 1.5800 1.3500 1.3700 43,200
1.5000 1.6300 1.4800 1.5000 44,000
1.5800 1.6600 1.3950 1.4200 51,200
1.8200 1.8500 1.4900 1.6000 114,700
Weekend
Weekend
1.7000 1.8600 1.5200 1.7300 105,500
1.7000 1.7350 1.4800 1.5100 26,200
1.6600 1.8100 1.6600 1.7000 17,900
1.8000 1.9300 1.6020 1.7200 29,200
2.0100 2.0100 1.7490 1.8400 74,900
Weekend
Weekend
2.2800 2.4000 1.8000 2.0100 61,500
2.4200 2.5650 1.9500 2.1000 85,300
9 · 8-K After-hours · 16:35 ET 8-K ↗ 8 · 10-K After-hours · 16:21 ET 10-K ↗ 7 · 8-K After-hours · 16:05 ET 8-K ↗
2.8200 2.8200 2.5300 2.5300 13,300
2.9100 2.9100 2.6300 2.8000 20,600
2.9500 2.9500 2.8000 2.9000 14,800
Weekend
Weekend
3.1300 3.1300 2.8200 3.0700 22,100
3.1600 3.2000 2.8900 3.1900 18,300
3.1300 3.2500 3.0100 3.0800 11,400
3.0500 3.1200 3.0200 3.1200 1,600
3.3300 3.5310 2.9530 3.2200 12,600
Weekend
Weekend
3.4400 3.5100 3.1800 3.3100 11,300
3.2200 3.3700 3.2200 3.3500 5,800
3.3700 3.4950 3.1600 3.2100 8,000
3.3100 3.3400 3.2100 3.2800 3,400
3.5700 3.5700 3.3000 3.3000 6,000
Weekend
Weekend
3.2500 3.5110 3.2300 3.5110 4,300
3.3400 3.4900 3.3400 3.3400 4,900
3.2400 3.4100 3.1100 3.3700 24,300
3.2900 3.3630 3.1900 3.1900 6,000
No trading
Weekend
Weekend
3.4000 3.5000 3.2660 3.3200 5,700
3.5100 3.5100 3.2600 3.2600 5,200
3.6700 3.6950 3.4600 3.4600 6,600
3.7100 3.7100 3.7100 3.7100 1,300
3.7200 3.7200 3.4500 3.5800 6,800
Weekend
Weekend
3.7900 3.8620 3.5900 3.6600 6,600
3.9500 3.9500 3.7400 3.8880 6,000
4.0700 4.0700 3.8700 4.0100 5,400
4.0700 4.2470 3.8900 3.9980 8,000
3.9800 3.9800 3.9200 3.9200 2,200
Weekend
Weekend
4.2100 4.2100 3.9000 3.9700 8,400
4.0900 4.2200 4.0900 4.1400 7,200
4.1700 4.5000 4.0900 4.1000 3,800
4.1800 4.3150 4.1500 4.1800 3,500
4.5000 4.5440 4.2400 4.2900 8,100
Weekend
Weekend
4.3400 4.6000 4.3110 4.5500 8,000
4.4350 4.5600 4.3400 4.4000 3,700
4.2300 4.5100 4.1300 4.1800 9,100
4.0900 4.3100 4.0900 4.1200 6,900
No trading
Weekend
Weekend
4.4000 4.5300 4.0200 4.2200 23,600
4.2800 4.5600 4.2800 4.4400 5,400
4.4500 4.5150 4.3900 4.4000 10,200
4.5100 4.5450 4.3900 4.3900 4,800
4.5100 4.5750 4.3320 4.5200 9,000
Weekend
Weekend
6 · 8-K After-hours · 16:03 ET 8-K ↗
4.6600 4.7200 4.5300 4.5400 8,100
4.5100 4.7450 4.4550 4.6300 6,900
4.5300 4.6720 4.4700 4.4900 7,900
4.2000 4.7300 4.2000 4.5800 31,100
4.2100 4.5700 4.1600 4.1600 20,900
Weekend
Weekend
4.0000 4.4200 3.9200 4.2800 12,700
No trading
4.4300 4.6300 3.9100 3.9200 43,300
4.2600 4.4100 4.1610 4.3200 19,200
4.5900 4.6550 4.2200 4.3000 16,200
Weekend
Weekend
4.7700 4.7700 4.5400 4.6100 10,800
No trading
4.3600 4.6350 4.3600 4.6100 3,300
4.5500 4.7500 4.4900 4.6600 16,100
4.5500 4.7700 4.4000 4.5310 15,700
Weekend
Weekend
4.4700 4.6320 4.4000 4.5500 9,400
4.2200 4.6100 4.1750 4.4700 31,500
4.2900 4.2900 4.1000 4.1900 33,500
4.1500 4.2880 4.0700 4.1800 10,900
4.3700 4.3700 4.1500 4.1500 12,900
Weekend
Weekend
5 · 8-K After-hours · 16:05 ET 8-K ↗
4.3000 4.5700 4.1300 4.3900 13,500
4.1200 4.6900 4.0500 4.2300 62,600
4.2500 5.0000 4.1500 4.1500 52,500
4.3800 4.5000 4.1020 4.2500 19,900
4.2300 5.2500 4.1200 4.3600 131,900
Weekend
Weekend
3.9600 4.2800 3.9600 4.1200 37,500
3.8300 4.2000 3.8300 3.9200 13,200
4 · 8-K After-hours · 16:18 ET 8-K ↗
3.6100 4.0000 3.5400 3.8800 32,700
3.7000 3.8100 3.6100 3.6200 11,700
3.7300 4.0100 3.6900 3.7800 14,100
Weekend
Weekend
3.6400 3.9500 3.6400 3.7800 7,700
No trading
3.4900 3.7500 3.4900 3.6700 23,100
3.4600 3.6150 3.4490 3.5000 12,600
3.3700 3.5900 3.2400 3.5100 12,900
Weekend
Weekend
3.4500 3.6100 3.0800 3.3600 50,700
3.4300 3.5850 3.4200 3.4300 25,800
3.9200 4.3340 3.4200 3.4200 31,700
3.8050 3.9700 3.4200 3.8500 17,000
3.5300 3.8200 3.4900 3.5600 23,700
Weekend
Weekend
3.5900 3.9250 3.4550 3.5800 33,700
3.8400 4.0400 3.5600 3.6600 23,600
4.2500 4.3300 3.9700 3.9700 23,300
4.4100 4.6130 4.2700 4.3300 21,700
4.6800 4.9500 4.3600 4.4100 18,000
Weekend
Weekend
4.3500 4.6830 4.3500 4.6500 21,700
5.2000 5.2000 4.4000 4.4800 75,400
3 · 8-K After-hours · 17:00 ET 8-K ↗ 2 · 10-Q After-hours · 16:20 ET 10-Q ↗ 1 · 8-K After-hours · 16:06 ET 8-K ↗
5.5900 6.0500 5.5200 5.5200 25,800
5.6300 5.8500 5.5400 5.6900 4,700
5.6600 5.8100 5.4700 5.7700 6,800
Weekend
Weekend
5.3800 5.7500 5.2500 5.6500 16,600
5.4900 5.6250 5.2100 5.2300 12,400
5.7500 5.8900 5.5800 5.6600 14,600
6.1000 6.1400 5.7500 5.7900 10,500
6.2500 6.6000 6.0550 6.1800 25,900
Weekend
Weekend
6.0900 6.3480 5.9000 6.1600 7,900
6.0100 6.2700 5.7800 5.9500 31,600

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.

21 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:59 ET Summarise
20 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:21 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
18 S-3 S-3 (opens SEC filing in a new tab) After-hours · 17:19 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) Pre-market · 09:07 ET Summarise
16 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 17:17 ET Summarise
15 PRE 14A PRE 14A (opens SEC filing in a new tab) Next filing day · accepted 10 Jun, 18:36 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) Pre-market · 09:00 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:27 ET Summarise
12 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:16 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
10 10-K/A 10-K/A (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:35 ET Summarise
8 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:21 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:18 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:20 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise