HarbisonWalker International Data Breach Lawsuit: Five Federal Dockets, No Settlement
Active Litigation
HarbisonWalker International, a Pittsburgh refractory maker, mailed breach notices on September 22, 2026. Within weeks, five federal lawsuit dockets were opened in the Western District of Pennsylvania, and the court has started folding them into one case. There is no settlement and no claim form. The one deadline that matters now is the free credit monitoring in your letter: enroll by December 31, 2026.
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What Happened in the HarbisonWalker International Data Breach
HarbisonWalker International (HWI) makes heat-resistant refractory products for industrial furnaces and kilns. It is headquartered in Pittsburgh and is part of the Calderys group. According to summaries of its notice, HWI identified suspicious activity on its internal network, secured the network and investigated. It has not publicly said when the intrusion happened or how it was carried out.
The data listed in breach-tracker summaries of the notice includes names, addresses, Social Security numbers, driver's license and other government ID numbers, financial account information, medical information and health insurance information. Your own letter says which of those applied to you.
The lawsuits allege that HWI failed to protect this information. Those are allegations; HWI has not been found liable for anything.
Case details
The first suit, now captioned In re: HarbisonWalker Data Breach Litigation, No. 2:26-cv-02109, was filed on September 24, 2026 in the U.S. District Court for the Western District of Pennsylvania and is assigned to Judge Robert J. Colville.
Further complaints followed: Doherty v. HarbisonWalker International Inc., No. 2:26-cv-02139, and a second Doherty docket, No. 1:26-cv-00272 and Wilson v. HarbisonWalker International, Inc., No. 2:26-cv-02142, all filed September 29, 2026; and Potter v. HarbisonWalker International Inc., No. 2:26-cv-02235, filed October 14, 2026.
Orders of consolidation were entered in the member cases on October 13 and October 15, 2026, which points to one combined case under the lead number.
Status: Consolidating, No Settlement
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Latest From the Court Docket
Recent entries in the federal cases behind this page, taken from the court's own docket. We check it at least once a day; this list is as of Oct 17, 2026.
Oct 15, 2026
Order of Consolidation (Docket on Member Case Only)
POTTER v. HARBISONWALKER INTERNATIONAL INC., No. 2:26-cv-02235 (W.D. Pa.)
Oct 14, 2026
ATTORNEY Complaint (Credit Card Required)
POTTER v. HARBISONWALKER INTERNATIONAL INC., No. 2:26-cv-02235 (W.D. Pa.), ECF No. 1
Oct 13, 2026
Order of Consolidation (Docket on Member Case Only)
WILSON v. HARBISONWALKER INTERNATIONAL, INC., No. 2:26-cv-02142 (W.D. Pa.)
Oct 13, 2026
Order of Consolidation (Docket on Member Case Only)
DOHERTY v. HARBISONWALKER INTERNATIONAL INC., No. 1:26-cv-00272 (W.D. Pa.)
All 3 dockets with recent entries
POTTER v. HARBISONWALKER INTERNATIONAL INC.
No. 2:26-cv-02235 · W.D. Pa. · latest entry Oct 15, 2026
Find this docket on CourtListenerWILSON v. HARBISONWALKER INTERNATIONAL, INC.
No. 2:26-cv-02142 · W.D. Pa. · latest entry Oct 13, 2026
Find this docket on CourtListenerDOHERTY v. HARBISONWALKER INTERNATIONAL INC.
No. 1:26-cv-00272 · W.D. Pa. · latest entry Oct 13, 2026
Find this docket on CourtListener
A docket entry is a step in the case, not a decision on who wins. Sources: the courts' PACER feeds and CourtListener (Free Law Project). Not legal advice.
Are You Affected?
The practical test is your mail. If you received a letter from HarbisonWalker International dated around September 22, 2026, your information was in the affected data. Keep the letter: it lists your data fields and carries the activation code for the credit monitoring.
Breach trackers summarizing the state filings put the total at 16,046 people, including 600 in Indiana and 456 in Texas. We could not open the state filings ourselves to confirm that figure.
You do not need to sign up anywhere to be part of a proposed class. If a class is certified or a settlement is reached, notice goes to class members directly.
What a Case Like This Pays
How cases like this one end
Our copy of the federal courts’ own case database covers 16,001 other personal property damage casesclosed in U.S. federal district courts between 2015 and 2026, 11.3% of them filed as class actions:
- 32.5% ended in a settlement recorded by the court. Another 19.5% were dismissed voluntarily, which often follows a private settlement — so the real settlement share sits between 32.5% and 52.1%.
- 5.9% were decided on a motion before any trial.
- 1 in 90 reached a trial (1.1%), after a median of 27.5 months.
- Median time from filing to the end of the case: 8.4 months.
- Only 250 of them (1.6%) record a money award at all; the median of those is $443,000.
These are base rates for this type of case (federal other personal property damage cases) — not a prediction about this lawsuit, and not legal advice. Source: Federal Judicial Center, Integrated Database (civil), analysed by Settlement Insight. Cases heard in state courts are not included.
HarbisonWalker Breach Timeline
Date Not Disclosed — Suspicious Network Activity
HWI identifies suspicious activity on its internal network, secures it and investigates. The date and method of the attack have not been made public.
September 22, 2026 — Letters and State Filings
HWI mails notice letters and reports the breach to state regulators, including Massachusetts and Vermont.
September 24, 2026 — First Federal Lawsuit
The first class action is filed in the Western District of Pennsylvania, No. 2:26-cv-02109, assigned to Judge Robert J. Colville.
September 29, 2026 — More Suits Filed
Doherty (2:26-cv-02139 and 1:26-cv-00272) and Wilson (2:26-cv-02142) are docketed in the same court.
October 13–15, 2026 — Consolidation Orders
Orders of consolidation are entered in the member cases. Potter (2:26-cv-02235), filed October 14, is consolidated October 15.
December 31, 2026 — Credit Monitoring Enrollment Deadline
The last day to enroll in the 24 months of Experian IdentityWorks offered in the notice letters. This is not a lawsuit deadline.
Three Things to Watch For
A fresh breach with SSNs and bank details, plus lawsuits but no settlement, is the gap imposters fill:
“Claim your HarbisonWalker settlement” pages
There is no settlement and no claims site. A form asking for your Social Security number or bank login to “secure your payment” is collecting the same data that was just exposed.
Fake Experian enrollment messages
The real offer works with the activation code printed in your letter. An email or text with its own link, a new code or a fee is not the HWI offer — go to Experian directly and use your letter's code.
Calls about your bank account “after the breach”
Financial account numbers were among the exposed fields. A caller who knows your account number and asks you to “verify” or move money is a fraud risk; hang up and call the number on your card.
HarbisonWalker Breach — Questions People Actually Ask
Short answers to the questions people ask most about this case.
Is there a HarbisonWalker International data breach lawsuit?
Yes. Five federal dockets were opened in the Western District of Pennsylvania between September 24 and October 14, 2026, led by No. 2:26-cv-02109 before Judge Robert J. Colville. As of October 17, 2026 they are being consolidated into one case.
How much can I get for a data breach lawsuit?
From this one, nothing yet: there is no settlement, no fund and no claim form. Any amount would come from a future settlement or judgment, which has not happened. The credit monitoring in your letter is the only benefit available today.
What data was exposed?
Per summaries of the notice: names, addresses, Social Security numbers, driver's license and government ID numbers, financial account information, medical information and health insurance information. Your letter states which applied to you.
How many people were affected?
Breach trackers put the total at 16,046 people, including 600 in Indiana and 456 in Texas. We could not verify that figure against the state filings directly.
Is the HarbisonWalker letter real?
Letters were mailed starting September 22, 2026, and the breach was reported to state regulators the same day. A genuine letter offers 24 months of Experian IdentityWorks with an activation code and does not ask you for payment.
Do I have to do anything to join the lawsuit?
No. You are included in a proposed class without signing up. If a settlement is reached, the official notice will explain any claim form and deadline.
When did the breach happen?
HarbisonWalker has not publicly said. Its notice describes suspicious activity on its internal network, without the dates of the incident or the method of attack.
What is worth doing right now?
Enroll in the credit monitoring by December 31, 2026. Freeze your credit at all three bureaus — free and reversible. Watch bank statements and health insurance benefit statements for activity you do not recognize, and keep your letter.
About This Information
Editorially Reviewed — Content reviewed for accuracy using published legal research, government data, and verified court records. See our methodology. Reviewed by Leonard Goldberg, Editor · Last updated - $236 billion in real payouts analyzed · See what we found
This page is for general information only and is not legal advice. Lawsuit status, eligibility, and compensation can change. Settlement Insight is not a law firm and does not represent any party. Consult a licensed attorney about your specific situation.
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