BOOM, October 28: news and $7.74

Gap and go. It gapped up 24.1% to $6.64 at the open, ran from the open to the high of $7.74 in 389 minutes, and held most of the move into the close: it gave back 3% of it by 4:00 p.m.

The shape's name comes from a fixed rule, not a judgement (how shapes are named). Halts are in the halt table below.

Previous close

$5.35

Open, 9:30 a.m.

$6.64

Gap at the open

+24.1%

Pre-market high

$6.70 at 9:29 a.m.

High, 4 a.m. to 4 p.m.

$7.74 at 3:59 p.m.

Low, 4 a.m. to 4 p.m.

$6.13

Close, 4 p.m.

$7.71

Change at 4 p.m.

+44.1%

After-hours high, 4 p.m. to 8 p.m.

$7.95 at 7:41 p.m.

Volume, 4 a.m. to 4 p.m.

2.55 million

Volume after hours, 4 p.m. to 8 p.m.

93,803

Relative volume by 8 p.m.

28.8×

Float

19.47 million shares, from filings as of October 28, 2026

Shares outstanding

20.54 million

• From news to the move: the first trade 20% above the previous close came 11 hours 28 minutes after the latest news item before it (Zacks Investment Research, Oct 27, 7:21 p.m.).
• Volume, from the one-minute bars: 281,450 shares before the 9:30 a.m. open (11%), 971,958 in the first 30 minutes (37%), and 1.39 million in the rest of the day to 8 p.m. (53%).
• Other days BOOM met the small-cap rule in our recaps: 1, the latest on October 27, 2026.

On the day's lists: the pre-market gappers, gainers, intraday runners. It is here because it met the small-cap rule on the pre-market gappers: price $2 to $20, up 10% or more, relative volume 5× or more, float under 20 million shares, its high reached $1 or more and it started the day at $20 or under (the rule every page uses).

The exchange's halt feed shows no halts for BOOM that day.

Halt bands that day: the LULD plan's Amendment 18 rules (what that means, LULD calculator).