PFAS Forever Chemicals: What 736 SEC Filings Reveal

PFAS — per- and polyfluoroalkyl "forever chemicals" — appear in 736 operational SEC filings across 22 industries, but the most counterintuitive finding isn't their ubiquity. It's that American Water Works, a company suing PFAS manufacturers in a multi-district lawsuit filed in December 2018, simultaneously warns that it could face CERCLA liability itself as a "passive receiver" of the same contamination. This dual-role paradox — plaintiff and potential defendant in the same regulatory regime — captures a broader pattern: PFAS creates fundamentally different financial exposures at each stage of the value chain, and no single company's filing reveals the full risk web.

Creation: 3M Exits Manufacturing, Stays Trapped in Supply Chain

3M completed its exit of all PFAS manufacturing at the end of 2025 and is paying $10.5 billion to $12.5 billion through 2036 to settle the Public Water Supplier class action. The company took a $0.8 billion pre-tax charge in Q4 2022 just to announce the exit. Filing intelligence flags "PFAS manufacturing losses increased YoY" as an ongoing margin concern even after production stopped.

But 3M's own filing reveals the paradox of PFAS exit: you can stop making the chemicals and still depend on them.

Examples of PFAS-containing third-party products include lithium ion batteries, printed circuit boards, certain seals and gaskets, and other products widely used in commerce across a variety of industries, and in some cases required by regulatory or industry standards.

3M's $10.5-to-$12.5-billion PFAS settlement is the largest individual payout, yet its own supply chain still relies on PFAS-containing components while it continues to evaluate whether PFAS-free alternatives exist for all products — a structural dependency that regulatory tightening could convert from a risk factor into a cost event.

Incorporation: Mohawk Never Made PFAS, Faces the Same Lawsuits

Mohawk Industries is a carpet manufacturer that incorporated PFAS into stain-resistant coatings. It never produced PFAS. It is now named as a defendant alongside the actual chemical manufacturers in lawsuits across Georgia, Alabama, and South Carolina, facing four distinct categories of plaintiffs.

The Company has been named as a defendant in a number of lawsuits in Georgia, Alabama, and South Carolina relating to carpet products that allegedly contained perfluoroalkyl and polyfluoroalkyl substances ('PFAS'). These lawsuits have been brought against chemical manufacturers and carpet manufacturers.

The plaintiff categories tell the story: municipalities seeking water filtration costs, counties seeking landfill remediation, private landowners alleging biosolids sludge contamination, and a proposed class of Rome, Georgia water subscribers claiming increased rates. Mohawk Industries faces four categories of PFAS lawsuits despite never manufacturing the chemicals — demonstrating that downstream product incorporation creates the same legal exposure as upstream production.

Contamination: American Water Works' Plaintiff-Defendant Paradox

American Water Works' subsidiaries have been parties to the PFAS multi-district litigation since December 2018, suing manufacturers for contamination of public water systems. The company has already received settlement payments from 3M and DuPont. But the same filing that describes AWK as a plaintiff also warns it could become a defendant.

it is not yet known whether or to what extent liability protection will be afforded to passive receivers of PFAS, including water and wastewater utilities

The EPA's September 2025 reaffirmation of enforcement discretion toward passive receivers does not change the underlying law.

In September 2025, the EPA reaffirmed this enforcement approach, explaining that, while it intends to focus CERCLA enforcement activities on entities that significantly contributed to PFAS releases and generally does not plan to pursue actions against passive receivers, its enforcement discretion does not alter CERCLA's underlying liability framework or restrict private party claims, and therefore the extent to which we may be subject to future CERCLA liability for PFAS-related claims remains uncertain.

And even if the liability resolves favorably, AWK warns there is "no guarantee" that regulators will approve rate increases to recover PFAS treatment costs — meaning the financial burden may land on utility shareholders rather than ratepayers.

American Water Works occupies PFAS litigation's most precarious position: simultaneously collecting settlement payments as a plaintiff while warning shareholders it could face the same CERCLA liability framework as the companies it's suing.

Supply Chain Disruption: Lam Research Warns of No Replacement

Lam Research represents the forward-looking edge of PFAS risk. The semiconductor equipment maker doesn't face cleanup costs or product liability. Instead, it faces the possibility that PFAS regulations could eliminate materials essential to chip manufacturing — with no substitute available.

increased restrictions imposed on a class of chemicals known as per- and polyfluoroalkyl substances ('PFAS'), which are widely used in a large number of products, including parts and materials that are incorporated into our products, may negatively impact our supply chain due to the potentially decreased availability, or non-availability, of PFAS-containing products.

"There is no assurance that suitable replacements for PFAS-containing parts and materials will be available at similar costs, or at all." With 25 semiconductor-sector filings mentioning PFAS in the past year, Lam Research's warning signals that PFAS regulation could cascade from environmental cleanup into technology supply chain disruption — a risk on a fundamentally different timeline than the backward-looking settlements consuming 3M and Chemours.

The Pattern: Cascading Liability, Differently Timed

PFAS creates a cascading liability structure where the type of financial risk morphs at each stage of the value chain — and the timing is staggered.

Chemical producers are settling historical liabilities now. 3M's $10.5-to-$12.5-billion settlement runs through 2036. Chemours carries $361 million in PFAS-related accruals and is fighting insurers through four arbitration demands filed since April 2025 under a complex Insurance Proceeds MOU — a secondary financial battle that shows the chemical industry is now fighting on two fronts simultaneously: settling with governments and plaintiffs while suing insurers who deny coverage.

In January 2021, Chemours, DuPont, Corteva, and EID, a subsidiary of Corteva, entered into a binding MOU, reflecting the parties' agreement to share potential future legacy liabilities relating to per- and polyfluoroalkyl substances ('PFAS') arising out of pre-July 1, 2015 conduct

Downstream product users like Mohawk are in the early stages of litigation. Water utilities like AWK occupy the most uncertain position — receiving settlement proceeds while facing open CERCLA questions. And semiconductor companies face a risk that hasn't materialized yet but could prove the most economically significant: the elimination of materials for which no replacement exists.

This staggered timing means PFAS regulatory tightening creates correlated but differently-timed financial exposure across industries. An investor tracking only chemical companies sees settlements. An investor tracking only semiconductor companies sees supply chain risk. Neither sees the full web — which is why cross-filing analysis matters.

Three things to watch:

1. Whether EPA enforcement discretion toward passive receivers becomes codified protection or remains a non-binding policy statement — the difference determines whether water utilities face CERCLA cleanup costs
2. Chemours' insurance arbitration outcomes — if insurers successfully deny PFAS coverage, the $1.3 billion remaining under the DuPont/Corteva cost-sharing MOU becomes the effective ceiling on shared liability
3. EU and state-level PFAS restriction timelines for semiconductor materials — Lam Research's "no assurance" language signals the industry has not yet identified viable substitutes

Frequently Asked Questions

What are PFAS forever chemicals and why do they appear in SEC filings?

PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals with carbon-fluorine bonds that resist degradation — hence "forever chemicals." They appear in 736 operational SEC filings because EPA regulations, CERCLA hazardous substance designations, and multi-billion-dollar settlements have made PFAS a material financial risk across 22 industries, from chemical production and water utilities to carpets, semiconductors, and insurance.

How much has 3M agreed to pay in PFAS settlements?

3M's Public Water Supplier class-action settlement totals $10.5 billion to $12.5 billion, with payments from 2024 through 2036. This is the largest individual PFAS settlement. 3M also recognized a $0.8 billion pre-tax charge in Q4 2022 when it announced it would exit all PFAS manufacturing by end of 2025. Even after exiting production, 3M's filing intelligence flags "PFAS manufacturing losses increased YoY" as a continuing margin concern.

Which companies are most exposed to PFAS financial risk?

Exposure varies by value chain position. Chemical producers (3M, Chemours) face backward-looking settlement costs. Water utilities (American Water Works) face dual-role risk as both plaintiffs suing manufacturers and potential CERCLA defendants. Downstream product manufacturers (Mohawk Industries) face lawsuits despite never producing PFAS. Semiconductor equipment makers (Lam Research) face forward-looking supply chain disruption with "no assurance" that replacements will be available.

Can water utilities be held liable for PFAS contamination they didn't cause?

Potentially, yes. American Water Works' 10-K states it is "not yet known whether or to what extent liability protection will be afforded to passive receivers of PFAS, including water and wastewater utilities." The EPA's September 2025 enforcement discretion announcement does not alter CERCLA's underlying liability framework or restrict private party claims — meaning utilities could face cleanup liability from private parties even if the EPA exercises restraint.

How could PFAS regulations affect the semiconductor industry?

PFAS chemicals are critical to semiconductor manufacturing for thermal stability, chemical resistance, and electrical insulating properties. Lam Research warns there is "no assurance that suitable replacements for PFAS-containing parts and materials will be available at similar costs, or at all." With 25 semiconductor-sector filings mentioning PFAS in the past year, proposed regulations could require industry-wide transitions away from materials with no proven substitutes.

Methodology

This analysis used MetricDuck's SEC filing intelligence tools to search 736 operational filings across 5 form types (10-K, 10-Q, 8-K, S-1, DEF 14A) for "PFAS" and "perfluoroalkyl." We identified 5 companies representing distinct value chain positions and analyzed their filing sections for cross-company patterns in PFAS-related financial exposure.

Tools used: SEC EDGAR Full-Text Search (EFTS) for landscape discovery across all 1,216 filings, MetricDuck filing intelligence for company-level triage and margin signal extraction, and the filing section reader for verbatim evidence extraction from risk factors, commitments and contingencies, and MD&A sections.

Limitations:

• Keyword-based search captures only filings that explicitly mention "PFAS" or "perfluoroalkyl" — companies with indirect PFAS exposure through supply chains or insurance policies that use different terminology are not captured
• Analysis covers a 12-month window from March 2025 to March 2026; historical filings from the onset of PFAS litigation (pre-2020) are outside scope and would show different disclosure patterns
• Five companies were analyzed in depth; the 30+ companies identified in the landscape search may contain additional risk patterns not covered here, particularly in insurance (SIC 6331, 15 filings) and hazardous waste management (SIC 4955, 15 filings)

Disclaimer: This analysis is for informational purposes only and does not constitute investment advice. All data is derived from public SEC filings and may contain errors from the automated extraction process. Settlement amounts, accrued liabilities, and regulatory outcomes are subject to change and should be verified against current filings before making investment decisions.