YMT, September 28: a 6-K and an after-hours run to $3.68

After-hours run. It opened down 1.1% at $1.79 and traded at $1.75 at the 4:00 p.m. close, then ran 110.3% from $1.75 to $3.68 at 4:42 p.m. after the close, on 9.60 million shares traded after hours.

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

$1.81

Open, 9:30 a.m.

$1.79

Gap at the open

−1.1%

Pre-market high

$1.81 at 4:00 a.m.

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

$1.81 at 4:00 a.m.

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

$1.72

Close, 4 p.m.

$1.75

Change at 4 p.m.

−3.3%

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

$3.68 at 4:42 p.m.

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

19,758

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

9.60 million

Relative volume by 8 p.m.

103.7×

Float

not available

Shares outstanding

not available

• From news to the move: the first trade 20% above the previous close came 2 minutes after the latest SEC filing before it (6-K, 4:01 p.m.).
• Volume, from the one-minute bars: 4,569 shares before the 9:30 a.m. open (0%), 9,846 in the first 30 minutes (0%), and 9.60 million in the rest of the day to 8 p.m. (100%).
• Other days YMT met the small-cap rule in our recaps: 2, the latest on September 29, 2026.
• The next session, September 29, 2026, it gapped up 21.5% at 9:30 a.m.

On the day's lists: the intraday runners, after-hours movers. It is here because it was in play on the intraday runners: up 30% or more on $3 million or more really traded, outside the small-cap rule's price, relative volume or float, 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 YMT that day.

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