How to spot dilution in SEC filings

Small-cap squeezes end when supply meets demand. A stock can rip 200% on a press release, but if management can drop a $50M ATM into the tape, that supply caps the move and usually reverses it. Reading the filings before the crowd does is what separates a profitable short from a margin call.

Every name on our database is scored against the same checklist: open shelf capacity, recent 424B activity, ATM history, warrant overhang, and prior reverse-split behavior. The forms below are the raw inputs.

An S-3 is a shelf — pre-approval to sell securities later without filing a fresh registration each time. It does not, by itself, mean dilution is happening today. But it is the loaded gun.

• Look at the aggregate offering amount. A $200M shelf on a $40M market cap is a structural ceiling.
• Check effectiveness. A filed S-3 becomes usable only once the SEC declares it effective — usually within 30 days, faster for WKSI issuers.
• Track remaining capacity. Each takedown reduces what's left on the shelf. We display the unused balance directly in the database.

424B filings are the actual takedowns off the shelf. When you see 424B2, 424B3, 424B5, or 424B7 hit after-hours, dilution just happened — read the first three pages.

• 424B5 is the most common small-cap dilution flavor: a registered direct or underwritten offering priced overnight. Expect a gap-down on open.
• 424B3 is often a resale by existing holders — supply hits the float without the company raising cash.
• Read the cover. The number of shares, the price, the use of proceeds, and the underwriter are all on page one.

An ATM lets a company sell stock directly into the open market through a sales agent, in size, on any green day. It is the most insidious form of dilution because it does not require a separate announcement each time shares are sold — only periodic disclosure in 10-Q or 8-K.

• Look for "Sales Agreement," "Equity Distribution Agreement," or "Controlled Equity Offering" language in the prospectus supplement that established the program.
• Compare authorized program size to recent average daily volume — a $75M ATM on a stock doing $5M/day will eat every rip until exhausted.
• If a name on a known active ATM gaps 50% pre-market, assume the agent is already selling.

Cheap warrants from a prior financing become free-trading the moment the underlying resale S-1 goes effective. That's when the bagholders become sellers.

• Check warrant strikes from the most recent financing. If the stock trades 2-3x above a strike with thousands of warrants outstanding, supply will appear on every rally.
• "Inducement letters" often appear in 8-Ks — a company offering a discounted exercise plus a fresh warrant to clear overhang. Bearish on the day, structurally bearish afterward.

8-Ks are the catch-all for material events. For dilution work, focus on:

• Item 1.01 — entry into a material agreement (often the SPA for an offering).
• Item 3.02 — unregistered sales of equity (private placements, PIPEs).
• Item 5.03 — amendments to the charter, including share-authorization increases and reverse splits.
• Item 8.01 — "other events," frequently used for ATM program launches.

The premarket clock is short. The repeatable workflow that works:

1. Filter the gappers list to anything up 20%+ on no clean fundamental catalyst.
2. Pull each name's recent filings (last 90 days) and flag any S-3, 424B, or ATM language.
3. Calculate remaining shelf capacity vs. market cap. Anything above 50% is a structural short.
4. Check borrow availability and short interest — if borrow is easy and SI is low, the offering risk skew is yours.
5. Set alerts for after-hours filings; that's when the takedowns hit.

Our Ticker Database runs steps 2–4 automatically and refreshes daily.

• Reverse split within the last 24 months — almost always followed by more dilution.
• Going-concern language in the most recent 10-Q.
• Cash runway under two quarters at the current burn rate.
• Auditor changes or Nasdaq deficiency notices in the last year.
• Repeated S-1 / S-3 filings — a company that lives on the shelf is a serial diluter.