Small-cap stocks on August 19, 2026: gappers, halts and filings

On August 19, 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 YJ, up 241.4% at 9:30 a.m. ET.

Pre-market gappers

The small caps up the most at 9:30 a.m. ET, the open: the price then against the previous close.

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.

Symbol	Gap at 9:30 a.m.	Price	Previous close	Volume	Relative volume	Float
YJ why it ran	+241.4%	5.94	1.74	42.21 million	1447.2×	2.51 million
RDAC why it ran	+128.9%	13.39	5.85	5.67 million	133806.1×	2.37 million
TNON why it ran	+107.1%	11.70	5.65	9.22 million	662.2×	606,596
EHGO why it ran	+50.8%	2.73	1.81	18.24 million	13.5×	2.06 million
FEMY why it ran	+36.8%	3.01	2.20	3.00 million	437.4×	8.22 million
MSS why it ran	+28.7%	2.02	1.57	7.45 million	24.6×	378,539
ZNB why it ran	+20.6%	2.69	2.23	15.66 million	245.5×	3.41 million
RCON why it ran	+18.6%	3.96	3.34	680,388	18.0×	950,506
VRAX why it ran	+17.8%	3.25	2.76	4.78 million	1202.9×	776,085
ZSTK why it ran	+16.2%	2.29	1.97	227,165	152.2×	17.48 million
TGL why it ran	+11.6%	2.98	2.67	2.13 million	2687.1×	1.82 million

Play the moment: RDAC at 9:30 a.m. ET

The real Level 2, time and sales and chart from 9:27 a.m. to 9:39 a.m. ET, from the same feed the replay plays. It stops at 9:30 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 4:00 p.m.	Last price	Previous close	Volume	Relative volume	Float
YJ why it ran	+148.9%	4.33	1.74	59.73 million	49.6×	2.51 million
ZSTK why it ran	+147.7%	4.88	1.97	11.09 million	1159.8×	17.48 million
TNON why it ran	+101.8%	11.40	5.65	25.01 million	711.0×	606,596
RDAC why it ran	+61.4%	9.44	5.85	11.33 million	2000.5×	2.37 million
SKK why it ran	+26.9%	5.80	4.57	3.91 million	1709.5×	2.88 million
FEMY why it ran	+20.9%	2.66	2.20	12.30 million	159.6×	8.22 million
NAKA why it ran	+20.8%	6.05	5.01	317,711	5.1×	11.52 million
GDC why it ran	+17.6%	2.20	1.87	5.30 million	53.2×	4.08 million
VRAX why it ran	+14.1%	3.15	2.76	7.54 million	248.7×	776,085
HYPD why it ran	+12.6%	3.04	2.70	1.11 million	9.4×	15.07 million
TGL why it ran	+12.0%	2.99	2.67	2.81 million	354.6×	1.82 million
BRNX why it ran	+11.3%	2.95	2.65	924,795	7.5×	720,888

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.

Symbol	High above the previous close	High to 8 p.m.	Previous close	Last price	Volume	Relative volume	Float
ZSTK why it ran	+529.4%	12.40	1.97	4.27	11.56 million	1178.4×	17.48 million
BTCT why it ran	+360.3%	2.14	0.4649	1.78	48.31 million	466.2×	16.96 million
RDAC why it ran	+284.8%	22.51	5.85	9.63	11.64 million	2009.0×	2.37 million
YJ why it ran	+273.6%	6.50	1.74	3.76	60.69 million	45.9×	2.51 million
TNON why it ran	+215.0%	17.80	5.65	9.70	25.73 million	65.8×	606,596
CDTG why it ran	+154.0%	8.33	3.28	3.02	17.68 million	15.8×	2.84 million
LOOP why it ran	+132.4%	1.47	0.6325	1.35	15.68 million	559.9×	26.54 million
ZNB why it ran	+125.6%	5.03	2.23	2.12	18.20 million	105.6×	3.41 million
BIVI why it ran	+122.9%	2.15	0.9644	1.52	21.79 million	6.7×	8.43 million
MSS why it ran	+98.7%	3.12	1.57	1.65	22.71 million	18.3×	378,539
SKK why it ran	+92.8%	8.81	4.57	5.77	3.96 million	1500.0×	2.88 million
AZI why it ran	+82.6%	2.10	1.15	1.36	20.07 million	12.6×	4.41 million
EHGO why it ran	+81.8%	3.29	1.81	1.40	25.69 million	11.5×	2.06 million
CISS why it ran	+78.8%	4.90	2.74	3.10	2.96 million	3.5×	327,048
BTOG why it ran	+76.8%	1.37	0.7749	0.9316	5.73 million	33.9×	56,352
VRAX why it ran	+69.6%	4.68	2.76	3.43	7.71 million	159.9×	776,085
FEMY why it ran	+67.7%	3.69	2.20	2.56	12.43 million	140.2×	8.22 million
GDC why it ran	+63.1%	3.05	1.87	2.33	5.37 million	49.2×	4.08 million
BTCS why it ran	+63.0%	1.76	1.08	1.48	2.97 million	11.6×	40.43 million
ARCT why it ran	+62.5%	13.34	8.21	10.40	3.30 million	10.0×	25.82 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

The small caps that gapped up and gave it back: below their open at 4:00 p.m. ET, the close.

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.

Symbol	Gap at 9:30 a.m.	Open	High to 4 p.m.	Last price	From the open	Float
RDAC why it ran	+128.9%	13.40	22.51	9.44	−29.6%	2.37 million
YJ why it ran	+241.4%	5.94	6.50	4.33	−27.1%	2.51 million
ZNB why it ran	+20.6%	2.66	5.03	2.23	−16.2%	3.41 million
TCGX why it ran	+23.9%	17.93	20.00	15.28	−14.8%	8.71 million
FEMY why it ran	+36.8%	3.00	3.69	2.66	−11.3%	8.22 million

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
9:32 a.m.	RDAC	9:37 a.m.	5 min 0 s	LULD pause (limit up-limit down)
9:39 a.m.	SKK	9:49 a.m.	10 min 1 s	LULD pause (limit up-limit down)
9:40 a.m.	TNON	9:45 a.m.	5 min 0 s	LULD pause (limit up-limit down)
9:40 a.m.	RDAC	9:45 a.m.	5 min 0 s	LULD pause (limit up-limit down)
9:46 a.m.	RDAC	9:51 a.m.	5 min 0 s	LULD pause (limit up-limit down)
9:49 a.m.	SKK	9:59 a.m.	10 min 1 s	LULD pause (limit up-limit down)
9:52 a.m.	CISS	9:57 a.m.	5 min 0 s	LULD pause (limit up-limit down)
9:53 a.m.	RDAC	10:03 a.m.	10 min 0 s	LULD pause (limit up-limit down)
9:58 a.m.	CDTG	10:08 a.m.	10 min 0 s	LULD pause (limit up-limit down)
10:00 a.m.	SKK	10:05 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:06 a.m.	SKK	10:16 a.m.	10 min 0 s	LULD pause (limit up-limit down)
10:07 a.m.	TNON	10:12 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:09 a.m.	RDAC	10:14 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:16 a.m.	SKK	10:27 a.m.	10 min 30 s	LULD pause (limit up-limit down)
10:17 a.m.	RDAC	10:22 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:23 a.m.	RDAC	10:28 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:28 a.m.	RDAC	10:33 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:31 a.m.	TNON	10:36 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:33 a.m.	SKK	10:43 a.m.	10 min 0 s	LULD pause (limit up-limit down)
10:40 a.m.	TNON	10:45 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:42 a.m.	ZSTK	11:24 a.m.	41 min 16 s	LULD pause (limit up-limit down)
10:43 a.m.	SKK	10:48 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:49 a.m.	SKK	10:54 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:51 a.m.	TNON	10:56 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:59 a.m.	SKK	11:04 a.m.	5 min 0 s	LULD pause (limit up-limit down)
11:00 a.m.	EHGO	11:10 a.m.	10 min 0 s	LULD pause (limit up-limit down)
11:12 a.m.	RDAC	11:17 a.m.	5 min 0 s	LULD pause (limit up-limit down)
11:12 a.m.	CDTG	11:17 a.m.	5 min 0 s	LULD pause (limit up-limit down)
11:24 a.m.	ZSTK	11:44 a.m.	20 min 19 s	LULD pause (limit up-limit down)
11:45 a.m.	ZSTK	11:50 a.m.	5 min 0 s	LULD pause (limit up-limit down)
11:50 a.m.	ZSTK	12:00 p.m.	10 min 14 s	LULD pause (limit up-limit down)
12:02 p.m.	TNON	12:07 p.m.	5 min 0 s	LULD pause (limit up-limit down)
12:03 p.m.	RDAC	12:13 p.m.	10 min 0 s	LULD pause (limit up-limit down)
12:03 p.m.	SKK	12:08 p.m.	5 min 0 s	LULD pause (limit up-limit down)
12:07 p.m.	CDTG	12:12 p.m.	5 min 0 s	LULD pause (limit up-limit down)
12:17 p.m.	CDTG	12:22 p.m.	5 min 0 s	LULD pause (limit up-limit down)
12:24 p.m.	CDTG	12:34 p.m.	10 min 0 s	LULD pause (limit up-limit down)
12:26 p.m.	RDAC	12:31 p.m.	5 min 0 s	LULD pause (limit up-limit down)
1:31 p.m.	SKK	1:36 p.m.	5 min 0 s	LULD pause (limit up-limit down)
1:37 p.m.	SKK	1:42 p.m.	5 min 0 s	LULD pause (limit up-limit down)
2:44 p.m.	CDTG	2:54 p.m.	10 min 0 s	LULD pause (limit up-limit down)
2:55 p.m.	ZNB	3:00 p.m.	5 min 0 s	LULD pause (limit up-limit down)
2:58 p.m.	BTCT	3:03 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:03 p.m.	BTCT	3:08 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:16 p.m.	BTCT	3:21 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:21 p.m.	BTCT	3:26 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:29 p.m.	CDTG	3:34 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:33 p.m.	BTCT	3:38 p.m.	5 min 0 s	LULD pause (limit up-limit down)

Every other halt that day: 40

Halted	Symbol	Resumed	Length	Reason in the feed
6:00 a.m.	KSMH	9:47 a.m.	227 min 29 s	No reason given in the feed
6:00 a.m.	FBYDP	did not resume that day		No reason given in the feed
6:38 a.m.	MEGX	7:00 p.m.	741 min 34 s	Operational
6:38 a.m.	USSX	7:00 p.m.	741 min 34 s	Operational
6:38 a.m.	USLX	7:00 p.m.	741 min 34 s	Operational
6:38 a.m.	USMX	7:00 p.m.	741 min 34 s	Operational
6:38 a.m.	USGX	7:00 p.m.	741 min 34 s	Operational
9:30 a.m.	MRVX	9:35 a.m.	5 min 0 s	No reason given in the feed
9:30 a.m.	RDACU	9:35 a.m.	5 min 3 s	LULD pause (limit up-limit down)
9:30 a.m.	WWJD	9:35 a.m.	5 min 3 s	LULD pause (limit up-limit down)
9:30 a.m.	NRDY	9:35 a.m.	5 min 7 s	LULD pause (limit up-limit down)
9:30 a.m.	ZVZZT	9:40 a.m.	10 min 0 s	LULD pause (limit up-limit down)
9:32 a.m.	IPST	9:42 a.m.	10 min 0 s	LULD pause (limit up-limit down)
9:35 a.m.	TEMC	9:40 a.m.	5 min 0 s	No reason given in the feed
9:41 a.m.	RDACU	10:11 a.m.	30 min 3 s	LULD pause (limit up-limit down)
9:54 a.m.	ARKY	10:09 a.m.	14 min 50 s	No reason given in the feed
9:56 a.m.	ZVZZT	10:06 a.m.	10 min 0 s	LULD pause (limit up-limit down)
10:08 a.m.	GRNQ	10:18 a.m.	10 min 0 s	LULD pause (limit up-limit down)
10:09 a.m.	ARKY	10:14 a.m.	5 min 0 s	No reason given in the feed
10:24 a.m.	GRNQ	10:29 a.m.	5 min 0 s	LULD pause (limit up-limit down)
10:29 a.m.	RTB	10:39 a.m.	10 min 5 s	LULD pause (limit up-limit down)
11:14 a.m.	BNMC	11:19 a.m.	5 min 0 s	No reason given in the feed
11:16 a.m.	GRNQ	11:21 a.m.	5 min 0 s	LULD pause (limit up-limit down)
11:28 a.m.	COIX	11:33 a.m.	5 min 3 s	No reason given in the feed
12:03 p.m.	RDACU	12:08 p.m.	5 min 3 s	LULD pause (limit up-limit down)
12:09 p.m.	RDACU	12:14 p.m.	5 min 3 s	LULD pause (limit up-limit down)
12:10 p.m.	MRA	12:15 p.m.	5 min 0 s	LULD pause (limit up-limit down)
12:21 p.m.	ATC	12:26 p.m.	5 min 3 s	LULD pause (limit up-limit down)
12:27 p.m.	RDACU	12:32 p.m.	5 min 3 s	LULD pause (limit up-limit down)
1:54 p.m.	GLU-A	1:59 p.m.	5 min 3 s	LULD pause (limit up-limit down)
2:04 p.m.	KWM	2:09 p.m.	5 min 0 s	LULD pause (limit up-limit down)
2:22 p.m.	CROB	2:27 p.m.	5 min 0 s	LULD pause (limit up-limit down)
2:40 p.m.	RDACU	2:45 p.m.	5 min 1 s	LULD pause (limit up-limit down)
3:13 p.m.	THYP	3:18 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:22 p.m.	GRNQ	3:27 p.m.	5 min 0 s	LULD pause (limit up-limit down)
3:57 p.m.	FVNNU	4:07 p.m.	10 min 0 s	LULD pause (limit up-limit down)
7:50 p.m.	LBRDP	did not resume that day		Additional information requested
7:50 p.m.	LBRDK	did not resume that day		Additional information requested
7:50 p.m.	LBRDA	did not resume that day		Additional information requested
7:50 p.m.	CURX	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.	TNON	EFFECT
4:54 p.m.	CISS	424B3
4:57 p.m.	CISS	424B3
5:00 p.m.	CISS	424B3
5:03 p.m.	CISS	424B3
5:05 p.m.	CISS	424B3
12:15 a.m.	GRNT	EFFECT
12:15 a.m.	ICCM	EFFECT
12:15 a.m.	ICCM	EFFECT
12:15 a.m.	NXH	EFFECT
12:15 a.m.	NXH	EFFECT
12:15 a.m.	MODD	EFFECT
12:15 a.m.	FTCI	EFFECT
7:30 a.m.	BRUN	424B5
7:32 a.m.	EPM	424B5
8:31 a.m.	VATE	S-3/A
11:18 a.m.	SGLY	424B5
4:01 p.m.	SPRC	F-3/A
4:04 p.m.	GRRR	F-3/A
4:05 p.m.	EDSA	424B5
4:33 p.m.	FVR	424B5
4:45 p.m.	ODYS	424B5
5:15 p.m.	SAR	424B2
5:25 p.m.	ASTC	424B5
5:26 p.m.	ASTC	424B5

Another 2 offering filings that day are not listed here.

Splits that took effect

Symbol	Split	Took effect
CISS	1-for-40 reverse split	August 19, 2026
EOCN	1-for-8 reverse split	August 19, 2026
GLMD	1-for-8 reverse split	August 19, 2026
NRDY	1-for-15 reverse split	August 19, 2026

Trade this day

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