Biggest Small-Cap Gaps August 31, 2026: Float and Dilution Sourced

Direct answer: On August 31, 2026, six small-caps posted gaps over +40% and intraday swings reaching +216%. The most dramatic moves were RDHL (+216% intraday, 6.08M float), ARTL (+798% gap, 3.49M float), and HCWC (+3282% gap, 26.59M float). These figures are measured from the FloatVerify database and reflect the range between session low and high, as well as the opening gap.

The six largest moves on August 31, 2026

The table below summarizes measured data for each of the six identified stocks. All figures come from the FloatVerify database and are dated August 31, 2026. Gap refers to the opening price deviation from the prior close; intraday range measures the span between session low and high.

Ticker	Intraday Range	Opening Gap	Float (millions)	Price ($)	Volume
RDHL (Redhill Biopharma Ltd.)	+216%	+106%	6.08	0.9089	47,494,205
YDDL (One and One Green Technologies. Inc)	+138%	+44%	56.03	2.24	10,062,464
AEHL (Antelope Enterprise Holdings Limited)	+131%	+91%	18.15	6.475	31,308,956
VVOS (Vivos Therapeutics, Inc.)	+112%	+76%	13.89	0.1954	240,948,454
ARTL (Artelo Biosciences, Inc.)	+66%	+798%	3.49	6.431	222,086
HCWC (Healthy Choice Wellness Corp.)	+50%	+3282%	26.59	8.41	144,306

Two stocks show extraordinary opening gaps: HCWC (+3282%) and ARTL (+798%). These spreads reflect events occurring between the prior close and the next open — corporate announcement, earnings release, or other catalyst. But the precise catalyst isn't established in this article. ARTL's float (3.49 million shares) is the smallest in the table. That mechanically amplifies moves when demand concentrates on a small number of available shares.

Low-float mechanics under heavy volume

Float represents the number of shares actually available for trading. You subtract insider holdings (executives, founders) and locked positions (lock-up agreements, contractual restrictions). The smaller the float, the less buying volume required to materially move the price.

On a gapping small-cap, this purely technical mechanism explains moves of dozens or hundreds of percent in a single session. RDHL illustrates the dynamic well: 6.08 million float, 47.49 million volume. Each available share traded roughly eight times during the day. When demand massively exceeds available supply, price climbs until it finds a level where new sellers are willing to part with shares.

VVOS illustrates an extreme case. Float of 13.89 million shares, volume of 240.95 million. Roughly 17 times the float. The +112% intraday range reflects that buying pressure concentrated on a limited number of available shares. YDDL, by comparison, shows a larger float (56.03 million) and more moderate relative volume (about 18% of float traded). Intraday move of +138% — significant, but less explosive than the low-float names.

Float isn't a fixed parameter. It changes with every dilution: capital raise, warrant exercise, convertible note conversion, employee stock issuance. A dated float is therefore essential to correctly interpret a price move. A +100% gap on a 3 million float doesn't carry the same technical meaning as an identical gap on a 50 million float.

Dilution and float evolution: why dating matters

Dilution refers to the issuance of new shares that increase the total outstanding count. Every dilution changes the float, unless the new shares are entirely subscribed by insiders or blocked by restrictions. Small-cap biotechs frequently rely on capital raises to fund clinical trials. Recurring dilutions.

SEC filings allow you to track these changes. Form 10-K (annual report) and 10-Q (quarterly report) detail the share count as of the reporting date. Forms 3, 4, and 5 (Section 16) disclose transactions by officers and holders of more than 10% of the equity. You can calculate the locked portion from those. Form S-1 or S-3 announces active capital raises.

A float dated June 30, 2026 may be obsolete by August 31, 2026 if dilution occurred in between. FloatVerify systematically displays the float update date and flags divergences between sources ("source split") when multiple data providers publish conflicting figures. A single falsely certain number is more dangerous than a documented range.

Four of the six stocks in the table come from biotech or medtech (RDHL, VVOS, ARTL, AEHL). Industries where capital raises are frequent and float can double in a matter of months. Tracking float evolution from SEC filings lets you distinguish a technical move (volume concentrated on a stable but small float) from a fundamental move (clinical catalyst, regulatory approval).

SSR and available data: where to find the information

The SSR (Short Sale Restriction) list includes stocks whose price dropped 10% or more from the prior close. Once on the list, a stock can only be shorted at the bid or above (uptick rule) for the remainder of the session and the following day. This restriction aims to limit aggressive short selling during sharp downward moves.

The exchanges (Nasdaq, NYSE) publish the SSR list daily. Available at session close or the following morning. FloatVerify archives these lists and allows you to verify whether a stock was placed on SSR during prior sessions. That can shed light on the technical context of a subsequent move.

None of the six small-caps in the table is documented as having triggered SSR on August 31, 2026. All posted positive gaps and upward intraday ranges. But some may have been listed on SSR during prior sessions, which would have limited short-selling pressure and contributed to amplifying the bounce.

Volume, float, and closing price data come from official market feeds (CTA, UTP) and SEC filings. Prices shown in the table are those observed at close on August 31, 2026. Float is calculated from the most recent filings available before that date. Any divergence between sources is documented in each stock's detailed profile on FloatVerify.

Recap

Point	Takeaway
Largest intraday move	RDHL: +216% (6.08M float, 47.5M volume)
Largest opening gap	HCWC: +3282% (26.59M float, 144k volume)
Smallest float	ARTL: 3.49 million shares
Highest volume	VVOS: 240.95 million (17× float)
Dominant sector	Biotech and medtech (RDHL, VVOS, ARTL, AEHL)
Data sources	FloatVerify database, SEC EDGAR, official market feeds

FAQ

What were the biggest small-cap gaps on August 31, 2026?

The six largest measured moves were RDHL (+216% intraday, +106% gap), YDDL (+138% intraday, +44% gap), AEHL (+131% intraday, +91% gap), VVOS (+112% intraday, +76% gap), ARTL (+66% intraday, +798% gap), and HCWC (+50% intraday, +3282% gap). These figures come from the FloatVerify database and measure the range between the low and high of the session, as well as the opening gap from the prior close.

Why does float matter for understanding these moves?

Float represents the number of shares actually available for trading, excluding insider holdings and locked positions. The smaller the float, the less buying volume needed to drive the price up significantly. ARTL shows a float of only 3.49 million shares — concentrated buying pressure on that float can produce outsized moves.

Where do you find a stock's float?

Float is calculated from SEC filings, primarily 10-K and 10-Q forms, plus Forms 3, 4, and 5 (insider holdings). Float isn't static — it changes with every dilution (new share issuance, capital raise, warrant exercise). A dated float is essential to correctly interpret a price move.

What is the SSR list and how do you check it?

The SSR (Short Sale Restriction) list includes stocks whose price dropped 10% or more from the prior close, triggering a restriction on short sales for the remainder of the session and the following day. The list is published daily by the exchanges (Nasdaq, NYSE) and can be accessed via official data feeds or specialized tools like FloatVerify.

Are these moves buy or sell opportunities?

FloatVerify provides no investment advice. The data presented — float, gap, volume — are measured and sourced facts, not recommendations. A large gap can result from technical mechanics (low float, concentrated volume, SSR) or fundamental catalysts, but nothing in this article constitutes a buy or sell signal.

Sources

• SEC EDGAR: sec.gov/edgar — Forms 10-K, 10-Q, 3, 4, 5, S-1, S-3
• Regulation SHO: short sale restriction rule (Short Sale Restriction)
• Official market feeds: CTA (Consolidated Tape Association), UTP (Unlisted Trading Privileges)
• FloatVerify: float, dilution, and cash burn database (dated and sourced data)

See the float, sourced and dated, on FloatVerify.

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FloatVerify shows the float, dilution and cash burn of US small-caps, every number sourced and dated — and surfaces divergences between sources ("source split") instead of one falsely certain figure.

Disclaimer: FloatVerify is a data tool, not an investment advisory service. Nothing here is a recommendation to buy or sell. Data, not advice.