Small-cap stocks on October 21, 2026: gappers, halts and filings
On October 21, 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 AHT, up 33.2% at the open.
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.
Play the moment: SPHL at 9:26 a.m. ET
The real Level 2, time and sales and chart from 9:23 a.m. to 9:35 a.m. ET, from the same feed the replay plays. It stops at 9:26 a.m. and asks what you would do, then plays on.
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.
| Symbol | Change at 4 p.m. | Close, 4 p.m. | Previous close | Volume, 4 a.m. to 4 p.m. | Relative volume by 8 p.m. | Float |
|---|---|---|---|---|---|---|
| SPHL why it ran | +44.9% | $3.52 | $2.43 | 16.34 million | 34.7× | 1.24 million |
| AHT why it ran | +43.6% | $2.57 | $1.79 | 12.95 million | 90.7× | 6.42 million |
| ATGL why it ran | +10.8% | $7.68 | $6.93 | 468,483 | 9.8× | 2.67 million |
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.
Or in play: up 30% or more at any moment on $3 million or more really traded, whatever its price, relative volume or float, its high at $1 or more.
| Symbol | Previous close | High, 4 a.m. to 4 p.m. | After-hours high, 4 p.m. to 8 p.m. | Close, 4 p.m. | Volume, 4 a.m. to 4 p.m. | Relative volume by 8 p.m. | Float |
|---|---|---|---|---|---|---|---|
| RBNE why it ran | $0.3978 | $2.10 | $0.2953 | $0.2362 | 58.36 million | 1168.5× | 1.32 million |
| POM why it ran | $1.99 | $3.55 | $5.89 | $2.00 | 9.33 million | n/m | 2.45 million |
| SPHL why it ran | $2.43 | $5.94 | $3.72 | $3.52 | 16.34 million | 34.7× | 1.24 million |
| REED why it ran | $0.4596 | $1.07 | $0.4498 | $0.4148 | 13.33 million | 36.8× | 5.71 million |
| SDEV why it ran | $0.83 | $1.65 | $1.30 | $1.09 | 41.05 million | 2.5× | 29.08 million |
| OLOX why it ran | $0.7424 | $1.35 | $1.02 | $0.9971 | 50.89 million | 13.6× | 2.12 million |
| STAK why it ran | $1.01 | $1.05 | $1.83 | $0.99 | 67,104 | 11.2× | not available |
| AMOD why it ran | $1.29 | $2.27 | $1.05 | $1.01 | 42.90 million | 7.7× | 53.65 million |
| AHT why it ran | $1.79 | $3.04 | $2.63 | $2.57 | 12.95 million | 90.7× | 6.42 million |
| INVE why it ran | $2.22 | $3.17 | $2.83 | $2.79 | 6.15 million | 92.8× | 20.59 million |
| VIVO why it ran | $2.20 | $3.12 | $2.33 | $2.18 | 3.22 million | 16.0× | 12.29 million |
| YMAT why it ran | $2.01 | $2.75 | $2.30 | $2.25 | 4.29 million | 0.7× | 2.70 million |
| PDSB why it ran | $0.9605 | $1.30 | $1.24 | $1.22 | 3.79 million | 1.3× | 90.07 million |
| ATGL why it ran | $6.93 | $9.32 | $8.14 | $7.68 | 468,483 | 9.8× | 2.67 million |
| BETR why it ran | $11.97 | $15.96 | $15.65 | $15.54 | 942,385 | 1.8× | 10.58 million |
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.
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.
| Halted | Symbol | Resumed | Length | Reason in the feed |
|---|---|---|---|---|
| 4:00 a.m. | POM | 9:30 a.m. | 330 min 1 s | No reason given in the feed |
| 9:33 a.m. | SPHL | 9:38 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 9:35 a.m. | POM | 9:40 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 9:41 a.m. | POM | 9:51 a.m. | 10 min 7 s | LULD pause (limit up-limit down) |
| 9:43 a.m. | RBNE | 9:48 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 9:51 a.m. | POM | 9:56 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 9:58 a.m. | POM | 10:03 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 10:02 a.m. | REED | 10:12 a.m. | 10 min 1 s | LULD pause (limit up-limit down) |
| 10:03 a.m. | POM | 10:08 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 10:16 a.m. | POM | 10:21 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 10:21 a.m. | REED | 10:26 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 10:25 a.m. | POM | 10:30 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 1:58 p.m. | AMOD | 2:08 p.m. | 10 min 0 s | LULD pause (limit up-limit down) |
| 2:34 p.m. | POM | 2:39 p.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 3:30 p.m. | POM | 4:00 p.m. | 29 min 41 s | LULD pause (limit up-limit down) |
Every other halt that day: 26
| Halted | Symbol | Resumed | Length | Reason in the feed |
|---|---|---|---|---|
| 4:00 a.m. | IIPR-B | 9:30 a.m. | 330 min 1 s | Administrative |
| 4:00 a.m. | POMG | 9:34 a.m. | 334 min 1 s | Administrative |
| 4:00 a.m. | RBTX | 9:41 a.m. | 341 min 58 s | Administrative |
| 4:00 a.m. | AHYM | 10:56 a.m. | 416 min 1 s | No reason given in the feed |
| 6:00 a.m. | SCIN | 9:56 a.m. | 236 min 30 s | No reason given in the feed |
| 9:29 a.m. | CHOW | did not resume that day | News pending | |
| 9:32 a.m. | TMS | 9:37 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 9:33 a.m. | SMCC | 9:38 a.m. | 5 min 0 s | No reason given in the feed |
| 9:39 a.m. | AHT-F | 9:44 a.m. | 5 min 3 s | LULD pause (limit up-limit down) |
| 10:19 a.m. | MPU | 10:24 a.m. | 5 min 3 s | LULD pause (limit up-limit down) |
| 10:21 a.m. | WHLRP | 10:26 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 10:22 a.m. | RFAIU | 10:27 a.m. | 5 min 3 s | LULD pause (limit up-limit down) |
| 10:29 a.m. | WZRD | 10:34 a.m. | 5 min 0 s | No reason given in the feed |
| 1:23 p.m. | ATII | 1:28 p.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 1:27 p.m. | IBO | 1:32 p.m. | 5 min 1 s | LULD pause (limit up-limit down) |
| 2:09 p.m. | ATIIU | 2:19 p.m. | 10 min 1 s | LULD pause (limit up-limit down) |
| 2:31 p.m. | RIBB | 2:36 p.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 2:35 p.m. | PNFP | 3:26 p.m. | 51 min 20 s | News pending |
| 2:35 p.m. | PNFP-A | 3:28 p.m. | 53 min 24 s | News pending |
| 2:35 p.m. | PNFP-C | 3:30 p.m. | 55 min 32 s | News pending |
| 2:35 p.m. | PNFP-B | 3:29 p.m. | 54 min 0 s | News pending |
| 3:01 p.m. | PW-A | 3:06 p.m. | 5 min 3 s | LULD pause (limit up-limit down) |
| 3:28 p.m. | FVNNU | 3:33 p.m. | 5 min 3 s | LULD pause (limit up-limit down) |
| 4:06 p.m. | EVEX.WS | did not resume that day | Regulatory | |
| 7:50 p.m. | DKI | did not resume that day | News pending | |
| 7:50 p.m. | AXNX | did not resume that day | News pending |
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.
| Filed | Symbol | Form |
|---|---|---|
| 12:15 a.m. | CITR | EFFECT |
| 12:15 a.m. | HMH | EFFECT |
| 12:15 a.m. | DRK | EFFECT |
| 12:15 a.m. | GTBP | EFFECT |
| 8:16 a.m. | OXLC | 424B2 |
| 10:03 a.m. | SVIA | 424B3 |
| 4:06 p.m. | OBAI | S-1 |
| 4:36 p.m. | TKNO | 424B5 |
| 5:15 p.m. | SLE | 424B5 |
| 5:20 p.m. | DFNS | S-3/A |
Splits that took effect
| Symbol | Split | Took effect |
|---|---|---|
| EHGO | 1-for-5 reverse split | October 21, 2026 |
Trade this day
Replay October 21, 2026 in Hindsight Markets: the real tape, the order book and the halts for every stock, on a clock you control, and see where your orders would have filled.