How do you avoid dilution in a public roll-up?

When is issuing shares good for existing owners?

Dilution means each existing share owns a smaller slice. That is fine if the slice is worth more. The test is earnings per share after the deal compared with before.

A short rule follows from the arithmetic. If you pay for a business in stock, the deal adds to earnings per share only when your stock's multiple is higher than the multiple you pay. If you pay 5x for a business and your shares trade at 10x, each new share brings in twice the earnings it gives up. If your shares trade at 4x, each new share gives away more than it buys.

The academic evidence says to apply this test strictly. A study of 6,000+ IPO registrations from 1990 to 2024 found stock-paid deals underperform cash deals by 20–30 percentage points over 3–5 years and are about 50% more likely to end in delisting.

Worked example: the break-even multiple

Take a hypothetical public holding company with $5M of EBITDA, no debt and 50M shares, or $0.100 of EBITDA per share. It buys a business with $1M of EBITDA for $4.5M, the GF Data 2024 median of 4.5x for $1–10M deals, all in stock.

1. Stock trades at 10x ($1.00 a share): 4.5M new shares. EBITDA per share = $6M / 54.5M = $0.110. Up about 10%.
2. Stock trades at 6x ($0.60 a share): 7.5M new shares. EBITDA per share = $6M / 57.5M = $0.104. Up about 4%.
3. Stock trades at 4.5x ($0.45 a share): 10M new shares. EBITDA per share = $6M / 60M = $0.100. No change.
4. Stock trades at 3x ($0.30 a share): 15M new shares. EBITDA per share = $6M / 65M = $0.092. Down about 8%.

Break-even is where your multiple equals the purchase multiple. Leave a margin above it for integration risk and the cost of being public.

Repeated issuance compounds. Issuing 10% more shares every year for five years means 1.1 x 1.1 x 1.1 x 1.1 x 1.1 = about 1.61 times as many shares. Castellum's 94.6M / 53M = about 1.78 times took two years.

What disciplines limit dilution?

1. Set a multiple floor. Do not pay in stock unless your trading multiple is a set margin above the purchase multiple. Write the margin into board policy.
2. Mix the currencies. Pay part in cash from debt, part in seller notes and part in stock. Main Street sellers expect cash: the IBBA Market Pulse for Q2 2026 found sellers received 83–92% of deal value in cash at close.
3. Budget issuance. Set an annual limit on new shares for acquisitions, compensation and advisers combined. Report against it.
4. Price fairly. Value shares for a deal on an average price over a period rather than a single day's close. Consider a collar so a price swing does not change the share count sharply.
5. Tie stock to performance where it fits. Outside SBA deals, earnouts are commonly 10–30% of value in the lower middle market. Paying part of an earnout in stock means shares are issued only if the business performs. Earnouts bring their own disputes: only 63% pay in full. SBA rules prohibit seller earnouts in SBA-financed deals.
6. Read financing terms closely. Convertible notes and warrants with price resets can issue far more shares if the stock falls. Have securities counsel model the worst case.
7. Pay advisers and promoters in cash where possible. Shares paid for services dilute every holder and buy no earnings.
8. Buy back when the stock is cheap. If shares trade well below what the businesses are worth, buying them back can do more for each share than another acquisition.

If you are still private

Dilution discipline starts before listing. Keep the cap table clean: know every option, warrant and convertible, and the share count each could create. Avoid issuing large blocks to advisers or promoters in return for helping you list. Decide your issuance policy now, so the board has it on day one.

My view is that going public fits only holding companies with real earnings or a clear path to them, books an auditor can work with and an acquisition program. For a public roll-up, one more condition matters: the discipline to say no to a stock deal that fails the math.

What should shareholders watch?

• Share count over time, and how much of the increase bought earnings.
• EBITDA or earnings per share, not just total EBITDA.
• The share of each deal paid in stock.
• Shares issued for services and financing, separate from acquisitions.

Where these numbers come from: Castellum figures are from this case review. Stock-paid deal performance is from the study reported on the CLS Blue Sky Blog. The 4.5x purchase multiple is the GF Data 2024 median reported by Carry and Conquer. Cash at close is from the IBBA Market Pulse Q2 2026. Earnout figures are SRS Acquiom data reported by Livmo. SBA earnout rules are from Cantrell Firm. The company in the worked example is hypothetical.

Related questions

Is some dilution normal in a roll-up?

Yes. A roll-up that uses stock will issue shares. The question is whether earnings per share rise as it does.

Should I ever issue stock below the purchase multiple?

Rarely. It reduces earnings per share on day one, so it only makes sense if the acquisition brings clear, near-term gains that cash could not buy. Write down why before you do it.

Do share buybacks offset dilution?

They can, if the shares are bought below their value. Buybacks use cash that could fund deals or reduce debt, so compare the uses.

What comes next

Sellers who take your stock will ask how they turn it into cash: how do sellers who take public stock get liquidity?

Related articles

• How do sellers who take public stock get liquidity?
• What finance team does a public holding company need?
• Public roll-up vs private roll-up: how does the math compare?
• How do you pay a seller with stock instead of cash?
• Should a holding company go public, and at what size?

Meraki Dealmakers is a service of Meraki Partners, LLC, an advisory firm. It is not a broker-dealer, investment adviser, business broker, law firm or accounting firm. This article is general information, not legal, tax or investment advice.