Biggest Small-Cap Gaps October 12, 2026: Float and Dilution Sourced

Direct answer: On October 12, 2026, four U.S. small-caps recorded opening gaps over 45%: MNDR (+205%, 1.19M float), YMAT (+102%, 4.01M float), GIXI (+56%, 2.49M float), and CLWT (+46%, 7.41M float). All four shared floats under 10 million shares and trading volumes that far exceeded their free float — a pattern typical of extreme volatility moves in small-cap names.

The Four Biggest Small-Cap Gaps October 12, 2026

On October 12, 2026, the U.S. small-cap market recorded four standout opening moves. Two common features: floats under 10 million shares and volume that exceeded the free float by multiples.

Ticker	Name	Opening Gap	Intraday High	Float (M)	Closing Price	Session Volume
MNDR	Mobile-health Network Solutions	+205%	+535%	1.19	$3.025	132,525,361
YMAT	J-Star Holding Co., Ltd.	+102%	+242%	4.01	$2.875	46,583,323
GIXI	Gix Internet Ltd.	+56%	+147%	2.49	$4.70	26,655,954
CLWT	Euro Tech Holdings Co Ltd.	+46%	+102%	7.41	$2.14	28,426,162

These figures come from the FloatVerify database, which compiles float data from SEC filings and cross-references them with intraday market data. We report measurable facts: gap, float, volume, price. Not underlying causes. Not predictions of future direction.

MNDR: A +205% Gap on a 1.19 Million Float

Mobile-health Network Solutions (MNDR) opened up 205% from the prior close. The intraday high reached +535%. The stock showed a float of 1.19 million shares at the time of the move — the tightest of the four movers recorded that day.

Session volume hit 132,525,361 shares traded. That's roughly 111 times the float. On a small-cap that gaps, this kind of volume-to-float ratio signals intense mechanical pressure. When volume massively exceeds the number of shares available, the same shares change hands repeatedly throughout the day. Each wave of buying or selling can then produce disproportionate price swings.

The stock closed at $3.025. That price reflects only a moment in time and implies no prediction about the stock's future direction.

YMAT: +102% at the Open, 4.01 Million Float

J-Star Holding Co., Ltd. (YMAT) posted a +102% opening gap and an intraday high of +242%. The measured float was 4.01 million shares — roughly 3.4 times MNDR's, but still in the low-float category (generally defined as under 10 million shares).

Session volume reached 46,583,323 shares. That's roughly 11.6 times the float. The ratio remains elevated but well below MNDR's. Close at $2.875.

GIXI: +56% on a 2.49 Million Float

Gix Internet Ltd. (GIXI) opened up 56% and hit an intraday high of +147%. The recorded float was 2.49 million shares. Session volume reached 26,655,954 shares, roughly 10.7 times the float.

Close at $4.70 — the highest closing price of the four movers recorded that day.

CLWT: +46% Opening Gap, 7.41 Million Float

Euro Tech Holdings Co Ltd. (CLWT) opened up 46% and hit an intraday high of +102%. With a float of 7.41 million shares, it's the widest of the four recorded movers. Still below the conventional 10-million threshold often used as a reference for low floats.

Session volume reached 28,426,162 shares, roughly 3.8 times the float. Close at $2.14.

The Mechanism: Why a Low Float Amplifies Volatility

Float (or free float) is the number of shares of a company available for public trading. You calculate it by subtracting from total shares outstanding:

• Shares held by executives and directors (insiders)
• Shares held by institutional investors subject to mandatory holding periods (lock-up)
• Restricted stock that cannot be sold without SEC registration

When the float is small, a sudden spike in buy volume can push the price up disproportionately. Simply because there are few shares available to absorb demand. Conversely, a wave of selling can trigger a sharp drop. It's a mechanical effect of supply and demand, not a guarantee of future direction.

A high volume-to-float ratio (like the 111× observed on MNDR) indicates the same shares circulate multiple times during the day between buyers and sellers. This pattern can reflect intense speculative interest, rapid position turnover (day trading), or a supply-demand imbalance at different points in the session. None of this constitutes a buy or sell signal: these indicators describe what happened, not what will happen.

Dilution: Why Float Changes Constantly

Float is not a static number. It evolves every time the company issues new shares (capital raise, at-the-market offering or ATM offering), converts debt instruments into equity (debt-to-equity conversion), lifts restrictions on restricted stock (unlock), or exercises warrants and options.

These events are disclosed in SEC filings:

• Form 8-K (material events, often used to announce a capital raise or conversion)
• Form S-1, S-3 (registration of new shares)
• Form 10-K, 10-Q (quarterly and annual reports, "dilution" section and cap table)
• Schedule 13D/G (filings by institutional investors holding more than 5% of outstanding shares)

Dilution increases the float, which mechanically tends to reduce volatility (more shares available to absorb volume). But it also reduces the ownership stake of existing shareholders. Factual data point to monitor, not a value judgment.

Where to Find Float Sourced and Dated

Float is not an officially published figure reported by companies in a standardized format. You must calculate it from SEC filings available on EDGAR. Primary sources are:

• Form 10-K (annual report): "Capital Stock" section, dilution table
• Form 10-Q (quarterly report): capitalization update
• Form 8-K: disclosure of events modifying the float (raises, conversions)
• Schedule 13D/G: positions of large institutional holders
• Form 4: insider transactions (buys, sells, option exercises)

FloatVerify compiles these filings to calculate a dated, sourced float, noting the date of the last filing used for the calculation. When multiple sources diverge (for example, a commercial aggregator shows 5 million shares while a recent 10-Q indicates 3 million), FloatVerify displays both figures with their respective sources rather than arbitrarily choosing one. That's called a source split: an alert, not an error.

Regulation SHO and the Short Sale Restriction (SSR)

When a stock drops 10% or more from the prior close, it automatically triggers the Regulation SHO Short Sale Restriction (SSR), which prohibits short sales at the bid price (only the ask is allowed) until the end of the following session.

In the case of the four tickers recorded on October 12, all opened higher. SSR was therefore not triggered at the open. However, if any of these stocks had subsequently dropped more than 10% from either its opening price or the prior close (whichever is lower), SSR could have been triggered intraday.

SSR is public data available in real time on the websites of major U.S. exchanges (Nasdaq, NYSE). This is not investment advice: it's a mechanical market rule designed to slow aggressive short selling.

Recap

Point	Takeaway
Biggest gap	MNDR +205% at the open, +535% intraday high
Tightest float	MNDR with 1.19 million shares available
Volume-to-float record	MNDR: 111 times the float traded in the session
Low-float threshold	Generally < 10 million shares; all four qualified
Where to find float	SEC Forms 10-K, 10-Q, 8-K on EDGAR, manual calculation required
Dilution	Float evolves with every issuance, conversion, or unlock
Nature of the data	Measured facts, no established catalyst, no prediction

FAQ

What were the biggest small-cap gaps on October 12, 2026?

The four largest gaps recorded were MNDR (Mobile-health Network Solutions) with a +205% gap, YMAT (J-Star Holding) at +102%, GIXI (Gix Internet) at +56%, and CLWT (Euro Tech Holdings) at +46%. All four tickers had floats under 10 million shares at the time of the move.

What is float and where do you find it?

Float (or free float) is the number of shares available for public trading, excluding shares held by insiders, locked-up institutional investors, and restricted stock. You calculate it from SEC filings (10-K, 10-Q, 8-K, Schedule 13D/G) available on EDGAR. The number changes with every dilution or conversion event.

Why does a low float amplify volatility?

A small float means fewer shares are available to absorb demand. When high volume concentrates on a narrow float, each buy order pushes the price up disproportionately, and vice versa on the downside. Mechanical effect of supply and demand, not a guarantee of direction.

What is an opening gap?

An opening gap is the percentage difference between the prior day's close and the first quoted price at the next day's open. A positive gap means the stock opens higher than its previous close, often on an imbalance of buy orders accumulated before the open.

Do these data indicate future direction?

No. FloatVerify shows factual data (float, dilution, volume), not recommendations. A large gap can fill, extend, or hold; no float data alone predicts future direction. Measured facts, not investment advice.

Sources

The data presented here come from the following primary sources:

• SEC EDGAR (sec.gov/edgar): Forms 10-K, 10-Q, 8-K, S-1, S-3, Schedule 13D/G, Form 4
• Regulation SHO (SEC short sale restriction rule): sec.gov/rules
• Intraday market data: prices, volumes, and opening gaps compiled in the FloatVerify database from public quote feeds

None of these sources constitute investment recommendations. They provide factual information on capital structure and market activity.

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.