Hindsight Markets / Recaps

Small-cap stocks on September 1, 2026: gappers, halts and filings

On September 1, 2026, these are the small-cap stocks that moved, read from the same data the replay plays: the pre-market gappers, the day's gainers, intraday runners, losers and fades, the after-hours movers, every halt, and the offerings and splits filed or in effect. A day's high runs from 4 a.m., pre-market included, to the 4 p.m. close. The biggest gapper was BIAF, up 68.9% at 9:30 a.m. ET.

Pre-market gappers

Fewer than three small caps met the rule at 9:30 a.m. ET, so there is no list.

The small-cap rule: price from 2 to 20 dollars, gapped up 10% or more before the open, relative volume 5× or more, float under 20 million shares.

Gainers

The small caps up the most from the previous close at 4:00 p.m. ET, the close.

The small-cap rule: price from 2 to 20 dollars, up 10% or more on the day, relative volume 5× or more, float under 20 million shares.

Intraday runners

The small caps whose high from 4:00 a.m. to 8:00 p.m. ET, pre-market and after hours included, was the furthest above the previous close, wherever they finished: a stock that spiked before the bell, during the day or after the close and gave it back is here.

The small-cap rule: the high priced from 2 to 20 dollars, a high 10% or more above the previous close, held by at least 3 one-minute bars that closed at or above that level on 100 shares or more, relative volume 5× or more, float under 20 million shares.

Losers

Fewer than three small caps met the rule at 4:00 p.m. ET, so there is no list.

The small-cap rule: price from 2 to 20 dollars, down 10% or more on the day, relative volume 5× or more, float under 20 million shares.

Fades

Fewer than three small caps met the rule at 4:00 p.m. ET, so there is no list.

The small-cap rule: price from 2 to 20 dollars, gapped up 10% or more and closed 10% or more below the open, relative volume 5× or more, float under 20 million shares.

After hours

Fewer than three small caps met the rule at 8:00 p.m. ET, so there is no list.

The small-cap rule: price from 2 to 20 dollars, moved 10% or more after the close, relative volume 5× or more, float under 20 million shares.

Why they ran

The stocks we wrote up for this day, each with its gap, float, halts, the news before the move and a chart.

• AMBR
• AMOD
• BIAF
• CDT
• DAIC
• FBLG
• FGL
• FLYE
• GPRO
• GYGY
• INBS
• KITT
• LABT
• LIDR
• MIRA
• OLOX
• PETZ
• PW
• PXS
• RDAC
• SOWG
• SSM
• SUNE
• UPC
• VIDA
• WETO

Halts

Every trading halt in the exchange's feed that day, in New York time: the small caps in the lists above first, then every other stock. See LULD halts.

Offerings filed

Offering filings with the SEC that day, from EDGAR, in New York time: the small caps in the lists above first, then the others. See offerings.

Splits that took effect