How to Quantify Competitive Advantages in a Prospectus: Market Share and Customer Retention Metrics

The SEC’s Division of Corporation Finance has intensified its scrutiny of forward-looking statements under Item 303 of Regulation S-K, with a particular focus on how issuers quantify their competitive advantages in risk factor and MD&A sections. In fiscal 2024, the SEC issued 142 comment letters specifically challenging the basis for market share claims and customer retention assertions in IPO registration statements, a 38% increase from 103 such letters in fiscal 2022, according to data from the SEC’s comment letter database published in January 2025. For US-listed issuers and Hong Kong-based sponsors advising on NYSE or Nasdaq-bound transactions, this means that vague references to “industry leadership” or “strong customer loyalty” without third-party corroboration now invite formal deficiency letters that can delay the offering timeline by 6-12 weeks. The SEC’s Staff Legal Bulletin No. 14M (June 2024) reinforced that management must disclose the “material assumptions” underlying any market share calculation, including the methodology for defining the addressable market and the source data for competitor benchmarks. For a Hong Kong-headquartered company filing a F-1 registration statement with the SEC, the failure to anchor competitive claims in auditable metrics — such as dollar-based net retention rates (DBNRR) calculated under ASC 606 or market share percentages sourced from Frost & Sullivan or IDC — can trigger a full-stop review that erodes the 180-day effectiveness window. This article dissects the specific quantitative frameworks that pass SEC review, using real comment letter precedents and the exact data points that underwriters and their counsel require in the prospectus.

The SEC does not prohibit issuers from making market share claims, but it requires that every such claim be supported by a “reasonable basis” that is disclosed in the prospectus. Under Item 303(a)(1) of Regulation S-K, management must discuss “known trends or uncertainties” that have had or are reasonably likely to have a material impact on net sales or revenues. When an issuer asserts it holds a 15% market share, that assertion constitutes a material trend claim, and the SEC will demand to know: (a) the definition of the total addressable market (TAM), (b) the methodology for calculating the issuer’s share, (c) the source of the data, and (d) whether the data is independently verified.

Third-Party Validation as the Gold Standard

The most defensible market share claims in SEC-reviewed prospectuses come from recognized third-party research firms such as Frost & Sullivan, IDC, Gartner, Forrester, or Euromonitor. In the SEC’s review of the F-1 registration statement for a Chinese EV manufacturer in 2023, the staff objected to the issuer’s claim of being a “top-5 EV maker in China” based on internal sales data aggregated from dealer reports. The SEC’s comment letter, dated 12 April 2023, requested that the issuer either (i) provide a third-party report from a named independent research firm that confirms the ranking, or (ii) remove the claim entirely from the prospectus. The issuer ultimately engaged Frost & Sullivan to produce a market study covering the 2022-2023 period, which cost approximately USD 80,000-120,000 and added 8 weeks to the filing timeline. The final prospectus included the Frost & Sullivan report reference and disclosed the methodology — specifically, that the TAM was defined as “passenger electric vehicles priced above RMB 150,000 in China” and that market share was calculated based on “vehicles registered with the Chinese Ministry of Public Security.”

Disclosing the Methodology and Its Limitations

Even with a third-party report, the SEC requires disclosure of the methodology’s limitations. In the same F-1, the SEC staff requested that the prospectus include a statement that “market share data is based on management estimates and third-party reports that involve inherent uncertainties, including differences in TAM definitions across studies.” The final prospectus included a risk factor stating: “The estimated market share data presented in this prospectus is based on a study commissioned from Frost & Sullivan, which defines the addressable market as X. This definition differs from the TAM used by IDC in its 2023 report on the same industry, which defined the market as Y. Accordingly, our market share may not be directly comparable to market share data published by other industry participants.” This level of specificity is now standard practice.

Customer Retention Metrics: DBNRR and Churn Under the SEC’s Lens

Customer retention metrics, particularly dollar-based net retention rates (DBNRR) and gross churn, are among the most heavily scrutinized non-GAAP metrics in SEC filings. Under Rule 100(b) of Regulation G, any non-GAAP financial measure included in an SEC filing must be presented with the most directly comparable GAAP measure and a reconciliation. For SaaS and subscription-based companies, DBNRR is not a GAAP measure, and the SEC has issued at least 37 comment letters in 2024 specifically challenging the calculation methodology for DBNRR in IPO prospectuses, according to a review of SEC EDGAR filings.

Defining the Calculation Cohort

The SEC’s primary concern with DBNRR is the definition of the customer cohort and the treatment of expansion revenue. In the SEC’s comment letter to a Hong Kong-based SaaS company filing a F-1 in October 2024, the staff requested that the issuer clarify whether DBNRR was calculated on a “beginning-of-period” cohort or a “point-in-time” cohort basis. The issuer had originally stated: “Our DBNRR for the year ended December 31, 2023 was 125%.” The SEC’s comment letter, dated 18 November 2024, asked: “Please describe the specific methodology used to calculate DBNRR, including whether the metric includes revenue from new customers acquired during the period, whether it includes revenue from customers that churned during the period, and whether it is calculated on a constant-currency basis.” The issuer’s response, which was reflected in the amended F-1/A, disclosed that DBNRR was calculated as “total revenue from the cohort of customers that were active as of January 1, 2023, divided by the revenue from the same cohort for the year ended December 31, 2022, excluding revenue from customers acquired after January 1, 2023 and including revenue from customers that churned during the period at zero value.”

The Revenue Reconciliation Requirement

The SEC also requires that DBNRR be reconciled to the most comparable GAAP measure, which is typically revenue from existing customers. In the same F-1, the issuer included a table reconciling DBNRR to GAAP revenue growth, showing that the 125% DBNRR comprised a 15% expansion from upsells and cross-sells, a 5% contraction from downgrades, and a 5% gross churn, resulting in a net retention of 115% on a GAAP-comparable basis. The SEC accepted this presentation. For Hong Kong issuers accustomed to HKEX Main Board Listing Rules Appendix 16 disclosure requirements, this reconciliation standard is more granular than the HKEX’s requirement under Rule 16.10, which only mandates that “any non-GAAP financial measure must be clearly defined and reconciled to the most directly comparable GAAP measure.” The SEC’s interpretation of “most directly comparable” is narrower — it must be a line item on the income statement, not a subtotal.

Structuring the Prospectus Disclosures: A Section-by-Section Blueprint

The placement of market share and retention metrics within the prospectus structure is as important as the numbers themselves. SEC staff review the MD&A section first, then the Business section, and finally the Risk Factors. The SEC’s Division of Corporation Finance has publicly stated that if a metric appears only in the Business section but not in MD&A, the staff will assume it is not material to an understanding of the company’s financial condition.

MD&A: The Primary Home for Quantitative Claims

Item 303 of Regulation S-K explicitly requires that MD&A discuss “known trends or uncertainties.” A 15% market share gain over three years is a trend. A DBNRR of 125% is a trend. The SEC expects these metrics to appear in the “Results of Operations” subsection of MD&A, with year-over-year comparisons for at least the three most recent fiscal years. For a company listing on the Nasdaq, this means the MD&A must include a table showing DBNRR for fiscal years 2022, 2023, and 2024, with a narrative explaining the drivers of the change. In the SEC’s review of a 2024 F-1 for a fintech company, the staff objected to the issuer placing its DBNRR disclosure only in the Business section under “Key Performance Indicators.” The SEC’s comment letter stated: “Because DBNRR is a metric used by management to evaluate the business and make resource allocation decisions, it should be discussed in MD&A, not solely in the Business section.” The issuer amended the filing to include a DBNRR table in MD&A.

Business Section: Context and Methodology

The Business section should contain the detailed methodology for market share calculations and customer retention metrics, but it should not repeat the MD&A numbers verbatim. Instead, the Business section should provide the “how” and the “why” — the definition of the TAM, the source of the data, the cohort definition, and the limitations. This structure mirrors the SEC’s own guidance in its “Disclosure Update and Simplification” release (Release No. 33-10532, 2018), which encourages issuers to “avoid duplicative disclosure” by placing detailed methodology in the Business section and performance trends in MD&A.

Risk Factors: The Downside of the Claim

Every quantitative competitive advantage claim must have a corresponding risk factor that addresses the possibility that the metric may not be sustainable. For a company claiming a 125% DBNRR, the risk factor should state: “Our DBNRR may decline if our existing customers do not expand their usage of our platform, if we fail to retain customers, or if our pricing model changes. A decline in DBNRR could materially and adversely affect our revenue growth and operating results.” The SEC’s comment letter practice shows that if an issuer includes a market share claim in the Business section but omits a corresponding risk factor, the staff will request one. In a 2024 F-1 for a Chinese education technology company, the SEC requested that the issuer add a risk factor stating: “Our estimated market share of 12% in the online K-12 tutoring market in China is based on a third-party study that may not reflect actual market conditions, and our market share may decrease as new competitors enter the market.”

Cross-Border Considerations for Hong Kong Issuers

For a Hong Kong-headquartered company filing a F-1 with the SEC, the quantification of competitive advantages must also account for the differences between HKEX and SEC disclosure standards. The HKEX’s Listing Rules, specifically Rule 11.07, require that a prospectus contain “such information as is necessary to enable a reasonable person to form a valid and comprehensive judgment of the issuer.” This is a lower bar than the SEC’s materiality standard under Rule 405 of the Securities Act, which requires disclosure of “all material information.” The SEC defines materiality under the Basic v. Levinson (1988) standard — information is material if there is a “substantial likelihood that a reasonable investor would consider it important.” This means that a Hong Kong issuer that has previously relied on the HKEX’s “reasonable person” standard for its HKEX filings must upgrade its disclosure for the SEC.

The PCAOB Audit Requirement

A significant cross-border consideration is the requirement that the issuer’s auditor be registered with the PCAOB and subject to inspection. For a Hong Kong issuer with a PRC subsidiary, the SEC’s Holding Foreign Companies Accountable Act (HFCAA) requires that the auditor certify that it is subject to PCAOB inspection. As of February 2025, the PCAOB has full access to inspect audit firms in Hong Kong and Mainland China, but the SEC continues to scrutinize whether the auditor’s work papers support the quantitative claims in the prospectus. In a 2024 enforcement action, the SEC charged a Hong Kong-based issuer with making false market share claims in its F-1, alleging that the issuer’s auditor, a Hong Kong firm, had not verified the third-party market study. The SEC’s order stated that the auditor’s failure to “test the reasonableness of management’s market share estimates” constituted a violation of PCAOB auditing standards AS 2501. For Hong Kong issuers, this means that the auditor must now specifically request and review the third-party market study, the issuer’s internal sales data, and the reconciliation between the two.

Actionable Takeaways

Engage a named third-party research firm (Frost & Sullivan, IDC, or Gartner) to produce a market study before filing the F-1, and budget USD 80,000-150,000 and 6-10 weeks for the study to be completed and reviewed by the SEC staff.
Calculate DBNRR on a beginning-of-period cohort basis, exclude new customer revenue, include churned customers at zero, and reconcile the metric to GAAP revenue growth in a tabular format within the MD&A section.
Place quantitative competitive advantage claims in the MD&A section under “Results of Operations,” with year-over-year comparisons for at least three fiscal years, and include the corresponding methodology in the Business section and a risk factor addressing the sustainability of the metric.
Ensure the PCAOB-registered auditor tests the reasonableness of market share estimates by reviewing the third-party study, the issuer’s internal data, and the reconciliation between the two, and document this testing in the audit work papers.
For Hong Kong issuers, upgrade the disclosure from the HKEX’s “reasonable person” standard to the SEC’s Basic v. Levinson materiality standard, particularly for any market share or retention metric that exceeds 10% of the addressable market or 100% DBNRR.

The Regulatory Standard: What the SEC Demands for Market Share Claims