The Biggest Small-Cap Gaps of September 29, 2026: Float and Dilution

Direct answer: On September 29, 2026, three small-caps posted exceptional price moves. BKYI (BIO-key International) surged +158% intraday with a +101% opening gap, on a float of just 1.09 million shares and volume of 101.2 million shares traded. SLND (Southland Holdings) climbed +66% intraday (gap +44%, float 54.22M, volume 130.7M), while SSTI (SoundThinking) gained +54% (gap +52%, float 13.16M, volume 3.3M). These swings illustrate how a tight float amplifies volatility when massive volume hits a thin order book.

Three Standout Moves from September 29, 2026

The September 29, 2026 session saw three U.S. small-caps post dramatic gains. Each shares a common denominator: a restricted float and trading volume well above normal.

Ticker	Name	Opening Gap	Intraday Peak	Float	Close Price	Volume
BKYI	BIO-key International, Inc.	+101%	+158%	1.09M	$3.1301	101,176,790
SLND	Southland Holdings, Inc.	+44%	+66%	54.22M	$0.69	130,650,802
SSTI	SoundThinking, Inc.	+52%	+54%	13.16M	$8.22	3,261,869

BKYI leads. Intraday peak of +158%, opening gap of +101% from the prior close. Float is 1.09 million shares. Volume hit 101.2 million shares traded. Do the math: roughly 93 times the float. Every available share changed hands 93 times during the session. Extreme turnover.

SLND gapped open +44% and touched an intraday peak of +66%. Float is wider—54.22 million shares—but volume reached 130.7 million shares, about 2.4 times the float. The stock closed at $0.69, in the "penny stock" category (price < $5). On a small-cap that gaps like this, the first question is always: what's the catalyst, and can the float absorb buying pressure without exploding?

SSTI shows a +52% gap and a +54% intraday peak. Float of 13.16 million shares, in the low-average range for small-caps. Volume of 3.3 million shares, roughly 25% of the float. Elevated, but nowhere near BKYI's frenzy. Likely a more targeted catalyst—sector news, contract, rumor—reaching a narrower investor audience.

What Is the Float and Why Does It Drive Gaps?

The float (or "floating supply") is the number of shares available for public trading. You calculate it by subtracting from total shares outstanding those held by insiders (executives, founders), investment funds subject to contractual restrictions (lock-ups), and any other locked holdings.

Simplified formula:
Float = Shares Outstanding — Locked Shares (insiders, contractual restrictions, non-tradable institutional blocks)

A low float creates a thin order book. When heavy buying volume hits that book, available supply dries up fast. Price jumps sharply to find new sellers. Supply-demand imbalance amplified by scarcity of available shares.

In BKYI's case, a 1.09M float means roughly one million shares in free circulation. When 101.2 million shares trade in one session, that implies massive recycling of the same share pool. They pass from hand to hand at progressively higher prices as buyers bid up. A 10 million float is already low. One million is a pressure cooker.

The Role of Volume: From Balance to Imbalance

Trading volume measures the total number of shares bought and sold during a session. Normal volume for a small-cap runs between 0.1 and 1 times the float per day. When volume hits several multiples of the float, you have exceptional activity. Catalyst, rumor, squeeze, or manipulation.

BKYI: volume of 101.2M on a 1.09M float. Ratio of ~93. Each share traded an average of 93 times during the day. This kind of extreme turnover occurs when massive buying flows—momentum traders, algorithms, retail FOMO—chase a limited share pool. Price climbs in successive steps, because each buyer must bid above the last seller. The order book gets vacuumed.

SLND: volume of 130.7M on a 54.22M float. Ratio of ~2.4. The move is significant (+66% intraday), but turnover stays within a "manageable" range. A wider float dilutes the impact of a given volume: it takes more capital to move price as much.

SSTI: volume of 3.3M on a 13.16M float. Ratio of ~0.25 (25%). The percentage gain (+54%) is high, but volume stays within an "active" range without reaching BKYI's frenzy. The catalyst likely reached a narrower investor audience.

Catalysts and Short Squeezes: What the Data Doesn't (Yet) Tell

The data provided here specifies no specific catalyst for these moves. Inventing causes without verifiable sources would be dishonest. A +100% gap can result from several factors:

• Corporate announcement: major contract, regulatory approval, strategic partnership, clinical trial results (for a biotech), acquisition.
• Short squeeze: if a significant portion of the float is sold short (high short interest), an initial price move can force short sellers to cover their positions. Forced buying, feedback loop, price propelled.
• Rumor or social buzz: discussions on Reddit, Twitter/X, Discord can trigger a wave of speculative buying in low-float stocks.
• Manipulation or pump-and-dump: groups can promote a low-liquidity stock to drive up the price before selling their positions.

To identify the real catalyst, consult:

• 8-K filings by the company (material events that must be reported within four business days).
• Official press releases (company website or financial newswires).
• Short interest data published by exchanges (twice monthly for NASDAQ and NYSE).
• Discussion threads and news feeds on financial platforms (Bloomberg, Reuters, StockTwits, Reddit WallStreetBets).

Note on Regulation SHO and SSR: if a stock drops more than 10% from the prior close, the Short Sale Restriction (SSR) activates. It prohibits short sales at a price below the best bid. This rule temporarily limits downward pressure. In the case of BKYI, SLND, and SSTI, the moves are upward (+100%, +44%, +52% at the open), so SSR likely didn't trigger on September 29. But it could trigger the next day if a sharp correction occurs.

How Does Float Evolve Over Time?

A small-cap's float is not a fixed number. It changes with every dilution event.

• New share issuance: fundraising (offerings), private placements (PIPE), debt-to-equity conversions.
• Warrant exercise: warrants grant the right to buy shares at a set price. When exercised, new shares enter the float.
• Stock-based compensation: companies compensate employees and executives in shares (RSU, stock options). Once vested, they increase the float.
• Lock-up expirations: after an IPO or SPAC, insiders are subject to a lock-up period (typically 180 days). At expiration, those shares can be sold, increasing the available float.

These events are announced in SEC filings:

• 8-K: material events (fundraising, debt conversion, acquisition).
• S-1 or S-3: registration of new shares for public sale.
• Prospectus: details the number of shares to be issued, price, use of proceeds.
• 10-Q and 10-K: quarterly and annual reports showing total shares issued and outstanding.

A float displayed on a third-party site (Bloomberg, Yahoo Finance) can be obsolete if a recent dilution event hasn't been integrated. FloatVerify shows the data date and divergences between sources ("source split"), instead of a single falsely certain figure. A float dated six months ago can be completely obsolete.

Risks and Volatility of Low-Float Small-Caps

Low-float stocks exhibit extreme volatility characteristics.

• Wide bid-ask spreads: the difference between the best buy price and best sell price can be substantial. Reduced liquidity.
• High slippage: a market order can be executed at a price far from the displayed quote, especially on small stocks. You click at $3.00, you get filled at $3.15.
• Manipulation potential: "pump-and-dump" groups target low-liquidity stocks. A few tens of thousands of dollars are enough to drive up the price, attracting unsuspecting investors.
• Euphoria and panic cycles: after a +100% move, massive profit-taking can drop the stock 50% or more in a few hours.

A one-million-share float isn't inherently "good" or "bad." It's a structural parameter that amplifies volatility in both directions. Understanding the mechanics before allocating capital remains the only defensible approach.

Where to Find Sourced Float and Dilution Data

Float is never displayed directly in a single SEC filing. It's reconstructed by cross-referencing multiple filings.

1. Shares outstanding: 10-K (annual report), 10-Q (quarterly report), "Outstanding Shares" section.
2. Insider holdings: Form 4 (insider transactions), Schedules 13D/13G (holdings > 5%), proxy statements (DEF 14A).
3. Locked shares: prospectus detailing lock-up periods, notes in 10-Ks on contractual restrictions.
4. Dilution history: 8-K (announcement of offerings, debt conversions), S-1/S-3 (registration of new shares).

FloatVerify automates this cross-referencing and displays the date of each data point, divergences between sources (when two databases give different floats for the same ticker), and cash burn rate (the rate at which the company consumes cash—a predictive indicator of future dilution).

Recap

Point	Takeaway
Biggest gap on 09/29	BKYI +158% intraday, gap +101%, float 1.09M, volume 101.2M (93× float)
Intermediate move	SLND +66% intraday, gap +44%, float 54.22M, volume 130.7M (2.4× float)
Third gain	SSTI +54% intraday, gap +52%, float 13.16M, volume 3.3M (0.25× float)
Key mechanism	Low float amplifies volatility: high volume creates sharp supply-demand imbalance
Living data	Float changes with every dilution (offerings, warrants, debt conversions)—always check the date
Primary source	SEC EDGAR (10-K, 10-Q, 8-K, Forms 4, 13D/13G) to reconstruct float and track dilution

FAQ

Which small-cap had the biggest gap on September 29, 2026?
BKYI (BIO-key International) posted the largest move with +158% intraday peak, a +101% opening gap, on a float of 1.09 million shares. Volume reached 101.2 million shares traded, roughly 93 times the float.

What is the float and why does it matter for gaps?
The float is the number of shares available for public trading (excluding locked-up holdings by insiders, funds, or contractual restrictions). A low float (< 10M shares) amplifies volatility: moderate buying volume creates a severe supply-demand imbalance, propelling the price sharply higher or lower.

Where can I verify a small-cap's float?
Float is calculated from SEC filings: the 10-K or 10-Q reports total shares outstanding, Form 4 (insider transactions) and Schedules 13D/13G (holdings > 5%) let you subtract locked shares. These filings are free on SEC EDGAR.

Was BKYI's volume on 09/29 abnormally high?
Yes. With 101.2 million shares traded on a 1.09M float, volume was roughly 93 times the available float. That means each share theoretically changed hands 93 times during the session—an extreme turnover rate signaling speculative frenzy or a catalyst event.

How can a small-cap's float change?
Float changes with every dilution: new share issuance (fundraising, debt conversion, warrant exercise, stock-based compensation). Each SEC filing (8-K, S-1, prospectus) can announce an increase in share count, diluting existing shareholders and expanding the float. A float dated six months ago may be obsolete.

Sources

• SEC EDGAR: official database of U.S. public company regulatory filings (sec.gov/edgar).
• Forms 10-K and 10-Q: annual and quarterly reports, "Outstanding Shares" section for shares issued.
• Form 8-K: announcements of material events (fundraising, debt conversions, acquisitions).
• Forms 4, 13D, 13G: insider and institutional holdings, allowing float calculation by subtracting locked shares.
• Regulation SHO: SEC rules on short selling, including the Short Sale Restriction (SSR) triggered after a 10% decline.
• Prospectus and Forms S-1/S-3: registration of new shares for public sale, details of upcoming dilutions.

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.