ATM Equity Program: Continuous Share Issuance at Market Prices

Key Takeaways

• An ATM program lets a public company sell new shares daily through a sales agent at prevailing prices, with no roadshow, no discount, and no single pricing day.
• ATM programs account for roughly 15–25% of annual US follow-on dollar volume, with the heaviest usage in biotech, REITs, and cannabis issuers.
• ATMs are dilutive even though no single day registers a visible offering announcement; cumulative share issuance drags EPS over time without triggering headlines.
• Running an ATM while in possession of material non-public information exposes the issuer to Rule 10b-5 liability; programs must be suspended during quiet periods.

What It Is

An at-the-market offering is a continuous sale of newly issued common stock by a listed company directly into the secondary trading market, executed by a designated sales agent (a broker-dealer) at prevailing market prices. The program is set up as a sales agreement or equity distribution agreement filed as an 8-K exhibit, with a prospectus supplement drawn off the issuer's existing shelf registration statement on Form S-3.

Unlike a marketed follow-on, there is no roadshow, no price discount, and no pricing day. Shares trickle out through the agent's normal order flow, usually priced at the bid or inside the spread, and the issuer controls the pace, size, and suspension of the program.

The Intuition

A marketed follow-on is a block trade. It moves a fixed number of shares at a fixed price, which means the market has to absorb a known overhang in a single session. The deal prices at a discount to last sale to entice buyers and telegraph a message. For the issuer, that discount is a real cost.

An ATM trades flexibility for size. Instead of pricing $500 million in one night at a five percent discount, the issuer sells $20 million a day for a month at roughly prevailing prices. No discount, no roadshow, and the company can stop the moment the stock moves against it. The tradeoff is that ATMs are slow and cannot solve a large funding need on deadline.

How It Works

The workflow has four parts.

1. Eligibility. Only issuers that qualify to use Form S-3 can run a full ATM. S-3 requires at least 12 months of SEC reporting and, for primary offerings by non-WKSIs, a public float of at least $75 million. Well-known seasoned issuers (WKSIs) enjoy more flexibility, including automatic shelves and no baby-shelf float caps.

2. Agreement and prospectus supplement. The issuer signs an equity distribution agreement with one or more banks as sales agents. The agreement specifies maximum aggregate dollar amount, commission (typically 1 to 3 percent), representations and warranties, and suspension mechanics. A prospectus supplement is filed, and the existence of the program is disclosed in an 8-K.

3. Placement notices. When the issuer wants to sell, treasury emails or calls the sales agent with a placement notice: for example, sell up to 100,000 shares today with a floor price of $24.50. The agent uses its algorithmic or manual trading desk to execute, subject to market rules including Rule 10b-18 volume limits where applicable.

4. Disclosure and settlement. Shares settle T+1 under current US rules. The issuer discloses progress at minimum in each 10-Q or 10-K, and sometimes by prospectus supplement if a specific tranche is material. If the company is in possession of material non-public information, the program must be suspended. Ongoing maintenance also requires the S-3 shelf to remain effective and the issuer to confirm Rule 415 compliance.

Worked Example

A mid-cap biotech with a $1.8 billion market cap files a $300 million ATM program. The stock trades around $30 with average daily volume of 700,000 shares. The company wants to raise roughly $150 million over six months to fund a Phase 3 trial.

Treasury sends weekly placement notices averaging 60,000 shares per day. At $30 the agent executes near the volume-weighted average price, remits proceeds daily, and charges a 2 percent commission. Over 120 trading days the company sells about 5 million shares at an average realized price of $29.85, raising roughly $149 million and paying about $3 million in fees. A traditional marketed follow-on of the same size might have priced at a 5 percent discount and charged a 4 percent gross spread, costing the issuer about $13 million more. Industry surveys by Winston and Mayer Brown place ATMs at roughly 15 to 25 percent of annual US follow-on dollar volume, with usage heaviest in biotech, REITs, and cannabis.

Common Mistakes

1. Treating an ATM as non-dilutive. ATMs issue new shares. Every dollar raised creates share-count dilution in the denominator of EPS, even if the issuance never trips a single headline. Long-duration holders sometimes miss the drag because no single day registers a visible print.

2. Running an ATM while in possession of MNPI. The agent sells into a market that does not know what the issuer knows. Trading while in possession of material non-public information can turn an ATM print into a 10b-5 claim. Standard practice is to freeze placements during quiet periods and around unannounced events.

3. Confusing the shelf cap with the program size. The S-3 shelf is a ceiling. The ATM sales agreement sets a separate cap, which can be raised only by an amendment and refreshed prospectus supplement. Running past either figure is a securities-law problem.

4. Ignoring the signal effect. A large or frequently topped-up ATM at a depressed stock price tells the market the company needs cash and is willing to sell at any print. That signal itself tends to keep a lid on the stock. Timing and pace matter.

5. Forgetting baby-shelf limits. For non-WKSI issuers with less than $75 million in public float, Form S-3 General Instruction I.B.6 limits aggregate primary issuance to one-third of public float over any 12-month period. ATM programs that ignore the cap risk rescission liability.

Frequently Asked Questions

Q: What is an ATM equity program in simple terms? An ATM program is a standing arrangement where a public company can sell small amounts of new stock into the open market on any trading day through a broker-dealer agent. There is no announcement, no roadshow, and shares sell at or near the daily market price rather than at a negotiated discount.

Q: How does an ATM equity program affect investment decisions? ATM activity is dilutive but invisible in day-to-day price data. Tracking the share-count change between quarterly filings and watching the prospectus supplement disclosures the company must file shows how fast the ATM is being drawn. A frequently topped-up ATM at a depressed price signals ongoing cash pressure.

Q: What is a real-world example of an ATM equity program? A biotech with a $1.8 billion market cap sold 5 million shares over 120 trading days through an ATM, averaging 60,000 shares per day at roughly $29.85, raising $149 million at a 2% agent commission. The same capital from a marketed follow-on would have cost roughly $13 million more through the combination of discount and spread.

Q: How can investors use the ATM offering program to inform decisions? Non-WKSI issuers face a baby-shelf cap of one-third of public float in primary issuance over any 12-month period. When a small-cap company's ATM usage approaches that ceiling, additional equity capacity is limited, which constrains financing options and can accelerate the need for more expensive alternatives.

Q: How is an ATM equity program different from a traditional follow-on offering? A follow-on is a single event, disclosed publicly, with a specified size and a negotiated or bookbuilt price. An ATM is a continuous, ongoing facility that drips shares into the market at prevailing prices over weeks or months. Follow-ons create an immediate overhang event; ATMs create a slower, quieter dilution that accumulates in the share count.

Sources

1. Mayer Brown. "What's the Deal: At-the-Market Offerings." https://www.mayerbrown.com/-/media/files/perspectives-events/publications/2020/06/wtd--atm-offerings.pdf
2. Vinson & Elkins. "T+1 Settlement: Revisiting Ongoing ATM Programs." https://www.velaw.com/insights/t1-settlement-revisiting-ongoing-atm-programs/
3. Sichenzia Ross Ference Carmel LLP. "Going to the ATM: At the Market Public Offering." https://srfc.law/going-to-the-atm-at-the-market-public-offering/
4. Winston & Strawn. "Market Trends 2019/20: At-the-Market Equity Offerings." https://www.winston.com/a/web/202787/Market-Trends-201920-Market-Equity-Offerings-MultipleAuthors.pdf

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.