Deep Fission, Inc FISN

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Deep Fission, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 10.2600 · FX 1 USD = 1.288650 SGD · about SGD 13.2215 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 14.56 → 10.26 · -29.5%
14.56012.1609.760 30,31 32 33 Jun 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.

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Weekend
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10.5500 10.6500 10.0800 10.2600 69,100
11.5000 11.5000 10.4000 10.6700 133,100
11.1600 11.8500 11.1000 11.5700 131,400
10.3200 11.1700 10.3100 10.9800 115,800
10.6200 11.3200 10.2700 10.3100 117,600
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33 · 8-K After-hours · 16:06 ET FORM 8-K ↗
10.2900 10.7500 10.1000 10.6500 135,800
12.1200 12.4200 10.3800 10.5100 197,900
10.8700 12.8800 10.7300 12.1600 425,800
10.5600 10.7200 10.2000 10.6500 93,900
11.3500 11.5900 10.3100 10.3700 137,800
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11.1200 11.6200 10.5500 11.1100 99,500
10.8800 11.7600 10.5000 11.1400 254,500
10.4100 11.2900 9.9500 10.9900 142,900
9.7000 10.5100 9.6100 10.3700 245,700
10.4000 10.5800 9.2000 9.8800 376,800
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10.4000 10.5900 10.0400 10.2900 144,400
10.8000 10.8000 9.9100 10.4900 238,800
11.2200 11.2200 10.5000 11.0400 231,200
11.2400 11.2400 9.6400 11.0500 277,700
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10.4000 11.4300 9.7400 10.7500 591,700
10.0300 10.4800 7.6600 10.0300 823,200
14.5000 14.5700 9.5600 9.7600 1,339,000
12.0000 13.2500 11.8800 12.4400 805,300
32 · 8-K After-hours · 16:20 ET FORM 8-K ↗
13.6100 15.5000 11.5300 12.4200 1,609,200
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31 · 424B4 After-hours · 16:27 ET 424B4 ↗
16.0000 19.0000 14.5600 14.5600 2,779,000
30 · DEF 14A After-hours · 16:46 ET DEF 14A ↗
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29 · S-1/A After market open · 15:07 ET S-1/A ↗
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28 · S-1 Pre-market · 06:08 ET S-1 ↗
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27 · 10-Q After market open · 15:09 ET 10-Q ↗
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26 · 424B3 After-hours · 16:27 ET 424B3 ↗ 25 · 424B3 After-hours · 16:22 ET 424B3 ↗
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24 · 8-K After market open · 10:11 ET FORM 8-K ↗
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23 · S-1/A After market open · 15:50 ET S-1/A ↗
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22 · 10-K After-hours · 17:28 ET 10-K ↗
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21 · 8-K After market open · 10:46 ET FORM 8-K ↗
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20 · 8-K Pre-market · 09:05 ET FORM 8-K ↗
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19 · 8-K Next filing day · accepted 24 Feb, 21:13 ET FORM 8-K ↗
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18 · S-1 After market open · 14:38 ET S-1 ↗
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17 · 424B3 Pre-market · 07:31 ET 424B3 ↗ 16 · 8-K Pre-market · 07:30 ET FORM 8-K ↗
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15 · 424B5 After-hours · 16:05 ET 424B5 ↗
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14 · S-1/A Next filing day · accepted 26 Jan, 21:03 ET S-1/A ↗
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13 · S-1/A After market open · 14:05 ET S-1/A ↗
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12 · 8-K After-hours · 17:27 ET FORM 8-K ↗
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11 · 8-K Next filing day · accepted 10 Dec, 19:24 ET FORM 8-K ↗
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10 · 8-K After market open · 13:42 ET FORM 8-K ↗
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9 · S-1/A After-hours · 17:10 ET S-1/A ↗
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8 · 8-K After market open · 15:16 ET FORM 8-K ↗
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7 · 10-Q After-hours · 17:17 ET 10-Q ↗
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6 · 8-K After market open · 15:59 ET CURRENT REPORT ↗
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5 · 8-K Next filing day · accepted 06 Nov, 18:18 ET FORM 8-K ↗
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4 · S-1/A After-hours · 17:24 ET AMENDMENT NO 1. TO FORM S-1 ↗
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3 · S-1 After market open · 11:38 ET REGISTRATION STATEMENT ↗
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2 · 8-K After-hours · 17:22 ET CURRENT REPORT ↗
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1 · 10-Q After-hours · 16:12 ET QUARTERLY REPORT ↗
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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.

33 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
32 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:20 ET Summarise
31 424B4 424B4 (opens SEC filing in a new tab) After-hours · 16:27 ET Summarise
30 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:46 ET Summarise
29 S-1/A S-1/A (opens SEC filing in a new tab) After market open · 15:07 ET Summarise
28 S-1 S-1 (opens SEC filing in a new tab) Pre-market · 06:08 ET Summarise
27 10-Q 10-Q (opens SEC filing in a new tab) After market open · 15:09 ET Summarise
26 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:27 ET Summarise
25 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:22 ET Summarise
24 8-K FORM 8-K (opens SEC filing in a new tab) After market open · 10:11 ET Summarise
23 S-1/A S-1/A (opens SEC filing in a new tab) After market open · 15:50 ET Summarise
22 10-K 10-K (opens SEC filing in a new tab) After-hours · 17:28 ET Summarise
21 8-K FORM 8-K (opens SEC filing in a new tab) After market open · 10:46 ET Summarise
20 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 09:05 ET Summarise
19 8-K FORM 8-K (opens SEC filing in a new tab) Next filing day · accepted 24 Feb, 21:13 ET Summarise
18 S-1 S-1 (opens SEC filing in a new tab) After market open · 14:38 ET Summarise
17 424B3 424B3 (opens SEC filing in a new tab) Pre-market · 07:31 ET Summarise
16 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 07:30 ET Summarise
15 424B5 424B5 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
14 S-1/A S-1/A (opens SEC filing in a new tab) Next filing day · accepted 26 Jan, 21:03 ET Summarise
13 S-1/A S-1/A (opens SEC filing in a new tab) After market open · 14:05 ET Summarise
12 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 17:27 ET Summarise
11 8-K FORM 8-K (opens SEC filing in a new tab) Next filing day · accepted 10 Dec, 19:24 ET Summarise
10 8-K FORM 8-K (opens SEC filing in a new tab) After market open · 13:42 ET Summarise
9 S-1/A S-1/A (opens SEC filing in a new tab) After-hours · 17:10 ET Summarise
8 8-K FORM 8-K (opens SEC filing in a new tab) After market open · 15:16 ET Summarise
7 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:17 ET Summarise
6 8-K CURRENT REPORT (opens SEC filing in a new tab) After market open · 15:59 ET Summarise
5 8-K FORM 8-K (opens SEC filing in a new tab) Next filing day · accepted 06 Nov, 18:18 ET Summarise
4 S-1/A AMENDMENT NO 1. TO FORM S-1 (opens SEC filing in a new tab) After-hours · 17:24 ET Summarise
3 S-1 REGISTRATION STATEMENT (opens SEC filing in a new tab) After market open · 11:38 ET Summarise
2 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 17:22 ET Summarise
1 10-Q QUARTERLY REPORT (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise