Biggest Small-Cap Gaps October 2, 2026: Float and Dilution Sourced

Direct answer: On October 2, 2026, three small-caps posted major opening gaps: BCTXZ (BriaCell Therapeutics) +85%, AMOD (Alpha Modus Holdings) +198% at the open, and NIVF (NewGenIvf Group) +61%. Each move is measured with sourced float (2.33M to 5.92M shares), reported volume, and price at the time of measurement. No fundamental catalyst is established here — we stick to measurable facts: gap %, public float, volume, and market rules (SSR, circuit breakers).

Context: What a Gap Is and How We Measure It

A gap is the distance between one session's close and the next session's open. When the open prints above the prior close, you get an up-gap — a "hole" on the chart where no trades occurred. Gap size is expressed as a percentage: (Open Price - Prior Close) / Prior Close.

The float (or public float) represents the number of freely tradable shares. You exclude shares held by officers and directors (insiders), institutional investors under lock-up agreements, and restricted stock blocks. These numbers live in SEC filings: 10-K (annual report), 10-Q (quarterly), S-1 or S-3 (registration statements), sometimes 8-Ks (material events) or offering prospectuses. The float is never static. Every dilution event — a public offering, warrant conversion, option exercise — increases the float. A float figure must always carry a date.

Volume measures the number of shares traded during a session. On a gapping small-cap, cross-checking multiple sources becomes critical (consolidated SIP feeds, broker data, SEC Form 144 archives for insider sales) because platform-to-platform discrepancies can reach 10 to 20%.

The Three Gaps from October 2, 2026

BCTXZ (BriaCell Therapeutics Corp.)

• Gap: +85%
• Intraday max performance: +85%
• Float: 2.33 million shares
• Price: $0.298
• Volume: 82,611 shares

BCTXZ posted an 85% gap and held that level as its intraday peak. With a float of just 2.33 million shares, each trade carries more weight. Volume of 82,611 shares represents roughly 3.5% of the float — a modest fraction that, in a low-liquidity context, can still produce meaningful volatility if buy orders overwhelm available supply.

The $0.298 price tags BCTXZ as a penny stock (under $1). These stocks carry specific rules: some brokers must deliver a "risk disclosure document" before execution, bid-ask spreads often run wide (sometimes 5 to 10% of the stock's value), and volatility structurally exceeds that of stocks trading above $5.

No fundamental catalyst (press release, SEC 8-K filing, clinical announcement) appears in the data. The move remains an observed fact without an established explanation here.

AMOD (Alpha Modus Holdings, Inc. Class A)

• Gap: +198% (at the open versus prior close)
• Intraday max performance: +37%
• Float: 4.97 million shares
• Price: $3.49
• Volume: 101,834,686 shares

AMOD presents an instructive case. It gapped +198% at the open but posted only a +37% intraday high. Most of the move happened between the October 1 close and the October 2 open, and the stock then corrected sharply during the session. The listed price of $3.49 is likely an intermediate or closing value.

The volume is spectacular: 101.8 million shares traded on a float of 4.97 million. That's a turnover of over 2,000%, or more than 20 times the float. Such a ratio signals ultra-active trading, possibly fueled by day traders, algos, or successive waves of buying and selling. Under these conditions, price can whipsaw fast — the same pool of shares changes hands multiple times within the day.

A 4.97-million-share float puts AMOD among low-float small-caps. Unlike BCTXZ, the $3.49 price clears the strict penny-stock threshold, but still sits well below the levels where institutional buyers typically enter en masse (generally above $5 to comply with certain investment policies).

The gap catalyst is not provided. The move remains a measured fact.

NIVF (NewGenIvf Group Limited)

• Gap: +61%
• Intraday max performance: +1%
• Float: 5.92 million shares
• Price: $0.1253
• Volume: 95,915,426 shares

NIVF gapped +61% at the open but posted only a +1% intraday gain. Like AMOD, most of the move occurred outside regular hours (pre-market or between the prior close and the official open). The $0.1253 price places NIVF deep in penny-stock territory, with the attendant liquidity risks and wide bid-ask spreads.

Volume of 95.9 million shares on a float of 5.92 million yields a turnover of 1,620% (more than 16 times the float). Here again, the stock changed hands massively. This kind of churn often reflects intense speculative activity — the same shares pass from one day trader to another, creating inflated volume without necessarily a large base of distinct participants.

The 5.92-million-share float is the highest of the three tickers examined, but still within the low-float small-cap category. A typical mid-cap might carry a 50- to 200-million-share float.

No catalyst is provided.

Mechanics: Why a Low Float Amplifies Moves

A small float creates a liquidity asymmetry. If 100,000 buyers want in on a stock with only 50,000 shares available for sale at a given moment, the price must rise until new sellers agree to part with their shares. Conversely, if 100,000 shares need to be sold on a 2-million-share float with few buyers, the price drops until it finds takers.

This dynamic isn't unique to small-caps, but it's far more visible there. The float represents a fraction of what you see on large-caps (Tesla, Apple: several billion shares outstanding). On a low-float small-cap, a few million shares of volume can represent 50% to 100% of the float — enough to trigger violent price swings.

The Short Sale Restriction (SSR), defined by the SEC's Regulation SHO, triggers automatically when a stock falls 10% or more from the prior close. For the rest of that session and the next, short sales can only execute above the best bid (uptick rule). SSR does not apply to up-gaps: it only triggers on declines. But it can play a role in subsequent days if the stock corrects.

Circuit breakers (LULD: Limit Up-Limit Down) automatically halt trading on a stock if the price moves too quickly outside a reference band. For stocks under $3, the band is 75% (Tier 2). Above $3, it narrows to 5-10% depending on the time of day and liquidity tier. These pauses allow the order book to rebuild.

Where to Find the Float and Verify the Numbers

Public float doesn't appear on a single line in every SEC filing. You reconstruct it:

1. Total shares outstanding: in the 10-Q or 10-K, under "Capital Stock" or "Stockholders' Equity."
2. Shares held by insiders and affiliates: in Form 4s, proxy statements (DEF 14A), or ownership tables in 10-Ks.
3. Restricted stock blocks: in S-1/S-3 prospectuses, under "Selling Stockholders" or "Lock-Up Agreements."

Float = Outstanding shares - Insider holdings - Restricted stock.

This calculation must be dated. An offering dilutes the float (raises the outstanding), as does a warrant conversion. A stock showing 3 million float in January might carry 10 million by October.

Form 144s (insider sales) and 8-K Item 3.02 (unregistered sales) signal ongoing dilution. FloatVerify archives this data to track float evolution over time.

Recap

Point	Takeaway
Biggest gap (open)	AMOD +198% (corrected to +37% intraday)
Biggest sustained gap	BCTXZ +85% (intraday max = gap)
Highest volume/float	AMOD 101.8M shares on 4.97M float (turnover > 2,000%), NIVF 95.9M on 5.92M (turnover > 1,600%)
Smallest float	BCTXZ 2.33M shares
Penny stocks	BCTXZ ($0.298) and NIVF ($0.1253) trade under $1
Established catalyst	None provided in the data: moves are measured, causes remain to be documented via SEC filings or official releases
Market rules	SSR (Regulation SHO) triggers only on declines (-10%). LULD (circuit breakers) can halt trading if price exits the band (75% for stocks < $3, 5-10% above depending on tier)

FAQ

What were the biggest small-cap gaps on October 2, 2026?
BCTXZ gapped +85%, AMOD +198% at the open (though it closed the day at only +37% intraday max), and NIVF +61%. These figures come from the FloatVerify database, which tracks moves measured against public float and reported volume.

What is the float and where do you find it?
The float (public float) is the number of freely tradable shares, excluding shares held by insiders and restricted blocks. You find it in SEC filings: 10-K, 10-Q, S-1, S-3, and sometimes 8-Ks or prospectuses. It changes with every dilution event (offerings, warrant conversions, option exercises).

Why does a low float amplify price moves?
With a small float, each buy or sell represents a larger fraction of available supply. If demand outstrips supply on a 2-million-share float, the price adjusts more violently than on a 50-million-share float. It's a liquidity mechanism, not a directional guarantee.

How do you verify real volume on a small-cap?
Official volume appears on market feeds (NYSE, Nasdaq) and consolidated tapes (SIP). For small-caps, cross-checking multiple sources (broker feeds, terminals, SEC Form 144 archives) helps catch discrepancies. FloatVerify archives this dated data for each ticker.

What does SSR (Short Sale Restriction) mean?
SSR triggers automatically when a stock drops 10% or more from the prior close. For the rest of that session and the next, short sales can only execute above the best bid (uptick rule). It's a Regulation SHO rule from the SEC, not a total ban.

Sources

• SEC EDGAR: sec.gov/edgar — Forms 10-K, 10-Q, S-1, S-3, 8-K, Form 144, DEF 14A
• Regulation SHO (Short Sale Restriction): sec.gov/divisions/marketreg/mrfaqregsho1204.htm
• LULD (Limit Up-Limit Down): circuit breaker rules published by the SEC and SROs (FINRA, NYSE, Nasdaq)
• Dilution filings: S-1/S-3 (registration statements), 8-K Item 3.02 (unregistered sales), 424B prospectuses
• Float, volume, and price data: FloatVerify database (dated and sourced measurements)

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.