Case study: SEC climate disclosure rules & compliance — a startup-to-enterprise scale story

When the SEC finalized its climate-related disclosure rules in March 2024, fewer than 18% of publicly traded US companies had internal systems capable of producing the Scope 1 and Scope 2 emissions data the rules required at audit-ready quality, according to a Deloitte survey of 500 public company CFOs (Deloitte, 2025). That gap created an immediate addressable market for compliance technology startups. This case study traces how three companies navigated the path from early-stage climate disclosure tooling to enterprise-scale SEC compliance platforms, revealing the technical, commercial, and regulatory challenges that shaped their trajectories.

Why It Matters

The SEC's climate disclosure rules represent the most significant expansion of mandatory corporate reporting requirements in the United States since Sarbanes-Oxley. The final rules require large accelerated filers to disclose Scope 1 and Scope 2 greenhouse gas emissions, material climate-related risks, board governance of climate risk, and transition plan details. Phased implementation began with fiscal year 2025 for large accelerated filers, with smaller reporting companies following in subsequent years. Although legal challenges temporarily stayed portions of the rule, the SEC voluntarily paused enforcement while continuing to expect voluntary compliance aligned with the framework (SEC, 2025).

For compliance and policy professionals, the practical challenge is not whether climate disclosure will be required but how to build the internal infrastructure to produce reliable, auditable data on compressed timelines. Companies that waited for final rule clarity before beginning implementation found themselves 12 to 18 months behind peers who had started building data pipelines during the comment period. The startups profiled here developed the tools that many of those late movers now depend on, and their scaling journeys offer direct lessons about what enterprise-ready climate compliance infrastructure looks like in practice.

The stakes extend beyond regulatory compliance. Institutional investors managing more than $40 trillion in assets now incorporate climate disclosure quality into capital allocation decisions. BlackRock, Vanguard, and State Street have all published stewardship expectations requiring portfolio companies to demonstrate credible climate data governance, creating market pressure that reinforces regulatory requirements (BlackRock, 2025).

Key Concepts

Audit-ready emissions data refers to greenhouse gas emissions calculations that meet the evidence, documentation, and internal control standards required for third-party assurance. The SEC rules require limited assurance for Scope 1 and Scope 2 emissions initially, transitioning to reasonable assurance for large accelerated filers. This means emissions data must be traceable to source documents, calculated using consistent and documented methodologies, and subject to internal controls comparable to financial reporting processes.

Climate risk materiality assessment is the process companies use to determine which climate-related risks and opportunities are material to investors and therefore must be disclosed. The SEC rules align with the financial materiality standard already used for securities regulation, requiring disclosure of climate risks that a reasonable investor would consider important in making an investment decision.

GHG Protocol alignment refers to the use of the Greenhouse Gas Protocol Corporate Standard and Corporate Value Chain (Scope 3) Standard as the methodological framework for emissions calculations. The SEC rules require registrants to use a methodology consistent with the GHG Protocol or a comparable framework, making GHG Protocol fluency a baseline requirement for compliance platforms.

Internal controls over climate reporting (ICCR) are the policies, procedures, and systems companies implement to ensure the accuracy and completeness of climate-related disclosures. Modeled on internal controls over financial reporting (ICFR), ICCR frameworks typically include data collection controls, calculation verification processes, management review procedures, and documentation standards.

What's Working

Persefoni: From Carbon Accounting Tool to Enterprise SEC Compliance Platform

Persefoni, founded in Tempe, Arizona in 2020, built a carbon management and accounting platform initially targeting voluntary corporate sustainability reporting. The company's pivot to SEC compliance readiness illustrates how regulatory catalysts can accelerate startup scaling when product-market fit already exists. Persefoni raised $101 million in Series B funding in 2022, led by Prelude Ventures and TPG Rise Climate, and subsequently raised an additional $50 million extension round in 2024 specifically to build SEC compliance modules (Persefoni, 2025).

The platform's core architecture processes activity data from enterprise resource planning (ERP) systems, utility billing platforms, fleet management software, and supplier databases to calculate Scope 1, Scope 2, and Scope 3 emissions using GHG Protocol-aligned methodologies. For SEC compliance, Persefoni added audit trail functionality that records every data input, calculation step, methodology selection, and manual adjustment with timestamps and user identification, creating the evidentiary chain that external auditors require.

Persefoni grew from 85 enterprise clients in 2023 to more than 350 by late 2025, with the largest concentration among mid-cap public companies ($2 billion to $10 billion market capitalization) that lack the internal sustainability teams of Fortune 500 companies but face the same disclosure deadlines. Implementation timelines averaged 4 to 6 months for companies with existing sustainability data infrastructure and 8 to 14 months for companies building from scratch. Annual platform fees ranged from $150,000 to $500,000 depending on organizational complexity, number of facilities, and scope of emissions covered (Persefoni, 2025).

Watershed: Integrating Climate Disclosure with Financial Reporting Workflows

Watershed, founded in San Francisco in 2019, took a different approach to scaling climate compliance by embedding its platform directly into existing financial reporting and enterprise software workflows. The company raised $100 million in Series C funding in 2024 at a reported valuation of $1.8 billion, making it one of the most highly valued climate technology startups in the compliance space (Bloomberg, 2025).

Watershed's scaling strategy focused on building native integrations with the ERP and financial consolidation systems that public companies already use for SEC financial reporting, including SAP, Oracle, and Workiva. This integration approach reduced data migration friction and allowed finance teams, rather than sustainability teams alone, to own emissions data workflows. By 2025, more than 60% of Watershed's enterprise clients had their CFO organization as the primary platform owner, compared to approximately 25% of clients at competing platforms where sustainability or ESG teams remained the primary users.

The company's enterprise client list included Airbnb, Stripe, DoorDash, and Shopify, with particular traction among technology companies that went public between 2019 and 2022 and were building compliance infrastructure for the first time. Watershed reported that clients using its automated data ingestion pipelines reduced manual data entry errors by 73% compared to spreadsheet-based emissions calculations, and cut audit preparation time from an average of 14 weeks to 5 weeks (Watershed, 2025).

Novisto: Scaling SEC-Aligned Disclosure Through Multi-Framework Convergence

Novisto, founded in Montreal in 2019, built its platform around the challenge of multi-framework ESG disclosure, recognizing that US-listed companies operating globally would need to comply simultaneously with SEC rules, ISSB standards, EU CSRD requirements, and Canadian securities regulators' climate-related guidance. The company raised CAD $20 million in Series A funding in 2023 and expanded its US enterprise client base from 15 to more than 120 companies by 2025 (Novisto, 2025).

Novisto's differentiation centered on a "disclose once, comply with many" architecture that mapped individual data points to multiple regulatory frameworks simultaneously. A single facility-level natural gas consumption figure, for example, would automatically populate SEC Regulation S-K climate disclosure fields, ISSB IFRS S2 metrics, and CSRD ESRS E1 indicators. This reduced duplicative data collection by an estimated 40 to 55% for multi-listed companies and those with European operations (Novisto, 2025).

The company's enterprise growth came primarily through channel partnerships with Big Four accounting firms, who recommended Novisto to audit clients seeking to prepare for external assurance requirements. By 2025, approximately 45% of Novisto's new enterprise contracts originated through audit firm referrals, creating a distribution channel with lower customer acquisition costs than direct sales.

What's Not Working

Data quality at facility level remains the most persistent challenge for SEC compliance platform adoption. Many public companies, particularly those with large real estate portfolios, manufacturing operations across multiple jurisdictions, or complex franchise structures, do not have centralized utility data or metering infrastructure. A 2025 survey by the Center for Climate and Energy Solutions found that 34% of S&P 500 companies reported significant data gaps in Scope 1 emissions from owned facilities, typically related to fugitive emissions, refrigerant leakage, and small combustion sources (C2ES, 2025). Compliance platforms can only calculate what they can measure, and the "last mile" of data collection from individual facilities often requires physical infrastructure upgrades that fall outside the software vendor's scope.

Regulatory uncertainty and litigation risk have complicated go-to-market strategies for all three companies. The legal challenges to the SEC's final rules, combined with shifting political dynamics around climate regulation, created hesitancy among some potential enterprise clients who questioned whether investing $300,000 to $500,000 in compliance infrastructure was premature. Persefoni, Watershed, and Novisto all reported elongated sales cycles in late 2024, with average enterprise deal closure times increasing from 4.5 months to 7 months as corporate legal teams debated the likelihood of enforcement (Bloomberg, 2025).

Scope 3 complexity is testing the boundaries of current platform capabilities. While the SEC's final rules do not mandate Scope 3 disclosure, investor expectations and alignment with ISSB standards create strong market pressure for companies to report value chain emissions. All three platforms offer Scope 3 calculation modules, but accuracy varies widely depending on data availability. Spend-based estimates, the most common approach for categories like purchased goods and services, carry uncertainty ranges of plus or minus 30 to 50%, which can be problematic when those figures appear adjacent to audit-assured Scope 1 and Scope 2 data in regulatory filings.

Integration fatigue among enterprise clients is a growing friction point. Large public companies already manage 15 to 25 enterprise software integrations across finance, HR, supply chain, and operations functions. Adding a climate disclosure platform that requires data feeds from multiple internal systems competes for IT resources and integration bandwidth. Implementation delays of 3 to 6 months beyond initial timelines are common, with IT resource constraints cited as the primary cause in 60% of delayed deployments (Deloitte, 2025).

Key Players

Established Companies

• Workiva: cloud-based regulatory reporting platform already used by more than 75% of Fortune 500 companies for SEC financial filings, adding climate disclosure modules
• SAP: enterprise software provider integrating sustainability data management into its core ERP platform through SAP Sustainability Control Tower
• S&P Global: financial data provider offering Trucost environmental data and analytics used by institutional investors to evaluate climate disclosure quality

Startups

• Persefoni: carbon management platform scaling from voluntary reporting to audit-ready SEC compliance with more than 350 enterprise clients
• Watershed: climate disclosure platform embedding emissions data workflows into existing financial reporting infrastructure
• Novisto: multi-framework ESG disclosure platform enabling simultaneous SEC, ISSB, and CSRD compliance from a single data architecture
• Clarity AI: sustainability analytics platform using machine learning to estimate and verify corporate emissions data for institutional investors
• Sweep: European climate disclosure platform expanding into US markets to serve dual-listed companies facing both SEC and CSRD requirements

Investors and Funders

• TPG Rise Climate: climate-focused investment fund that led Persefoni's Series B and has invested more than $7 billion across climate technology sectors
• Prelude Ventures: early-stage climate technology investor backing multiple carbon accounting and disclosure platforms
• Sequoia Capital: led Watershed's Series C funding round, signaling mainstream venture capital confidence in climate compliance as an enterprise software category

Action Checklist

• Conduct a readiness assessment of existing emissions data infrastructure against SEC disclosure requirements, identifying gaps in facility-level data collection, calculation methodology documentation, and internal controls
• Evaluate at least three compliance platform vendors through structured RFP processes that test ERP integration capabilities, audit trail functionality, and multi-framework reporting
• Establish a cross-functional implementation team including finance, legal, sustainability, and IT representatives to own the climate disclosure platform deployment
• Develop internal controls over climate reporting (ICCR) documentation modeled on existing ICFR frameworks, including segregation of duties, management review procedures, and data reconciliation processes
• Engage external auditors early in the platform selection process to ensure the chosen solution produces outputs compatible with assurance engagement requirements
• Build a parallel reporting capability by running the new platform alongside existing processes for at least two reporting cycles before full cutover
• Map SEC disclosure data points against ISSB and CSRD requirements to identify multi-framework reporting efficiencies and avoid duplicative data collection

FAQ

Q: How much should a mid-cap public company expect to invest in SEC climate disclosure compliance? A: Total first-year implementation costs for a mid-cap public company ($2 billion to $10 billion market capitalization) typically range from $500,000 to $1.5 million, including platform licensing ($150,000 to $500,000), implementation consulting ($100,000 to $400,000), internal staff time allocation (equivalent to 2 to 4 FTEs for 6 to 12 months), and external assurance fees ($100,000 to $300,000 for limited assurance). Ongoing annual costs after the first year typically decrease to $300,000 to $800,000 as implementation consulting costs drop and internal teams gain proficiency.

Q: How long does it take to implement a climate disclosure platform from contract signing to audit-ready reporting? A: Based on deployment data from the three profiled companies, implementation timelines range from 4 to 14 months depending on organizational complexity and data readiness. Companies with existing sustainability data programs (prior CDP or TCFD reporting) typically complete implementation in 4 to 6 months. Companies building emissions data infrastructure from scratch require 8 to 14 months. The most common implementation bottleneck is facility-level data collection, particularly for companies with more than 50 operating locations or complex lease arrangements.

Q: Should companies wait for final resolution of legal challenges before investing in SEC climate compliance infrastructure? A: Most compliance professionals and legal advisors recommend proceeding with implementation regardless of litigation outcomes. Even if specific SEC rule provisions are modified or delayed, institutional investor expectations for climate disclosure continue to intensify independently of regulatory mandates. Companies that build robust emissions data infrastructure now will be positioned for compliance regardless of which specific regulatory framework ultimately applies. Additionally, more than 80% of the data collection and internal controls work required for SEC compliance is also necessary for ISSB, CSRD, and California SB 253 compliance, providing value across multiple regulatory scenarios.

Q: What role should the CFO organization play versus the sustainability team in SEC climate disclosure? A: The trend among early adopters is toward CFO organization ownership of climate disclosure processes, reflecting the SEC's treatment of climate data as a component of securities filings rather than standalone sustainability reports. Watershed reports that more than 60% of its enterprise clients have their CFO organization as the primary platform owner. However, sustainability teams typically retain responsibility for methodology selection, data quality oversight, and narrative disclosure development. The most effective organizational models establish a joint governance structure with the controller or chief accounting officer holding ultimate accountability for data accuracy and the chief sustainability officer owning disclosure strategy and content.

Sources

• Deloitte. (2025). CFO Climate Disclosure Readiness Survey 2025. New York, NY: Deloitte LLP.
• Securities and Exchange Commission. (2025). The Enhancement and Standardization of Climate-Related Disclosures for Investors: Final Rule Implementation Guidance. Washington, DC: SEC.
• Persefoni. (2025). Platform Impact Report: Enterprise Climate Disclosure at Scale. Tempe, AZ: Persefoni Inc.
• Watershed. (2025). Enterprise Climate Disclosure: Integration, Automation, and Assurance Readiness. San Francisco, CA: Watershed Technology Inc.
• Novisto. (2025). Multi-Framework ESG Disclosure: Platform Adoption and Client Outcomes. Montreal, QC: Novisto Inc.
• Bloomberg. (2025). Climate Tech Compliance Startups: Funding, Valuations, and Market Dynamics. New York, NY: Bloomberg LP.
• Center for Climate and Energy Solutions. (2025). Corporate Climate Data Quality: Gaps, Solutions, and Best Practices. Arlington, VA: C2ES.
• BlackRock. (2025). 2025 Stewardship Expectations: Climate Risk Governance and Disclosure. New York, NY: BlackRock Inc.