Reported to the NH Attorney General on April 14, 2025.
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Check My Rights →Landmark Admin, LLC was the subject of a data breach notification filed with the NH Attorney General. The AG filing was recorded on April 14, 2025.
Landmark Admin, LLC operates within the specialized administrative, insurance, and financial services sector, functioning as a third-party administrator (TPA) that manages complex back-office operations, policyholder accounts, and administrative workflows for major insurance and financial institutions. Because of the critical administrative and fiduciary duties it performs, Landmark Admin, LLC routinely handles, processes, and stores vast repositories of highly confidential data. This includes sensitive personally identifiable information (PII) and financial records for thousands of individuals whose policies or accounts are administered through the firm's platforms, making it an extremely lucrative target for malicious actors seeking to exploit centralized corporate databases. The security incident reported by Landmark Admin, LLC to the New Hampshire Attorney General in 2025 highlights the persistent and sophisticated threats facing third-party administrative entities and data handlers. While organizations in this sector typically deploy multi-layered cybersecurity defenses, unauthorized external actors frequently target network vulnerabilities, misconfigured cloud storage endpoints, or third-party vendor interfaces to breach corporate perimeters. In incidents of this nature, attackers often leverage advanced malware or ransomware variants to infiltrate internal networks, potentially exfiltrating substantial quantities of proprietary and consumer data before administrative teams detect the unauthorized access and deploy containment protocols. The data compromised during the Landmark Admin, LLC breach encompasses a dangerous aggregation of personal, financial, and administrative identifiers. The unauthorized exposure of Full Names, Dates of Birth, and Social Security Numbers strips individuals of foundational privacy protections, directly facilitating high-risk identity theft and unauthorized credit applications. Furthermore, because of the company's operational focus, exposed records likely include specific Policy Numbers, Financial Account Details, and detailed transaction or coverage histories. When combined, these data points empower malicious actors to execute sophisticated financial account takeovers, fraudulent wire transfers, and targeted phishing campaigns that can devastate a victim's financial well-being for years. As a custodian of sensitive consumer information, Landmark Admin, LLC was legally bound by stringent regulatory frameworks, including the Gramm-Leach-Bliley Act (GLBA) where applicable, as well as state-level data protection statutes and common-law negligence standards. These legal obligations mandate the implementation of robust administrative, physical, and technical safeguards—such as end-to-end encryption, multi-factor authentication, rigorous network monitoring, and routine vulnerability assessments—to protect consumer data from unauthorized disclosure. The occurrence of a widespread data breach strongly indicates potential structural failures in these required security protocols, raising serious questions regarding whether the company fulfilled its legal duty of care to safeguard the confidential information entrusted to its care. Receiving an official data breach notification letter from Landmark Admin, LLC is a formal acknowledgment that your private information was compromised due to corporate security shortcomings. Legally, the receipt of this letter establishes the foundational standing required to participate in a class action lawsuit aimed at holding the company accountable for its failure to protect sensitive data. Under established class action jurisprudence, affected individuals do not need to prove that they have already suffered actual financial loss or identity theft to seek legal redress; the increased, imminent risk of future harm is sufficient. Our law firm is actively investigating potential claims against Landmark Admin, LLC on a contingency fee basis, meaning there are never any out-of-pocket costs or fees unless we successfully recover compensation on your behalf.
Based on the data types reported in this filing, affected individuals face the following specific risks:
Your SSN is the master key to your identity. Once exposed, criminals can open new lines of credit, take out loans, or file taxes in your name.
Combined with a name and other leaked data, date of birth helps criminals pass identity verification questions at banks and government agencies.
Under the New Hampshire data breach notification law, you may have a legal claim against Landmark Admin, LLC if any of the following apply:
Applicable law: This breach was reported under the New Hampshire data breach notification law, which establishes your right to seek damages from Landmark Admin, LLC.
The hours spent responding to a data breach — canceling accounts, contacting credit bureaus, updating passwords, and investigating fraud — represent compensable economic harm in data breach litigation.
Once your SSN is exposed, protection becomes an ongoing expense. Plaintiffs in data breach settlements have recovered costs for credit freezes, identity protection subscriptions, and time spent dealing with fraudulent accounts — sometimes covering multiple years of exposure.
Fees charged to close and reopen accounts, issue replacement cards, or dispute fraudulent transactions are recoverable in data breach litigation. So are the costs of overdrafts, late payments, and credit damage caused by unauthorized activity.
Several state data breach laws provide for statutory minimum damages — fixed amounts recoverable per affected individual regardless of actual loss. These provisions exist specifically to make legal action viable for victims who have not yet experienced direct harm.
Note: an attorney general breach filing does not by itself establish a settlement fund, a payment amount, or a claim deadline. If an official settlement notice is later issued, rely on that notice for payment details and deadlines.
No. Under New Hampshire data breach notification law and federal law, the unauthorized exposure of your personal data — regardless of whether it has been actively misused — can be sufficient grounds for a claim. The breach itself is the injury.
Nothing. The Law Office of David S. Harris handles data breach cases on contingency — you pay zero upfront and owe nothing unless compensation is recovered.
Immediately place a free credit freeze at all three bureaus (Equifax, Experian, TransUnion). A freeze blocks new accounts from being opened in your name. Then file a complaint with the FTC at IdentityTheft.gov and contact our office — SSN exposure is one of the most serious breach types.
Banks may reverse fraudulent charges, but they are not obligated to compensate you for time lost, stress, or indirect damages. A class action claim against the breached company can recover those additional categories of harm.
Statutes of limitations for data breach claims vary by state but typically run 2–4 years. Depending on when you learned of the breach, you may still have time. Contact our office for a free eligibility review — there is no cost to find out.
Accepting free credit monitoring from Landmark Admin, LLC does not waive your right to pursue legal action unless you signed a specific release waiving claims. In most cases, victims who accepted monitoring can still file.
Not necessarily. Many data breach victims are never notified directly. If your personal information was held by Landmark Admin, LLC during the relevant period, you may still qualify even without receiving a letter. A free eligibility review can confirm your status.
Received a notification letter from Landmark Admin, LLC?
Read our dedicated guide — what the letter means and exactly what to do.
If you were affected by the Landmark Admin, LLC data breach, you may be entitled to compensation. Submit your information below for a free attorney review — no obligation, no upfront cost.
Source: State Attorney General filing, NH
View Official AG Filing →Landmark Admin, LLC breach?
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