high severity December 18, 2023 · 4 min read Unverified claim — what this is

Viking Therapeutics reported to the SEC following a breach Listed by ALPHV Ransomware Group

If you are a customer of Viking Therapeutics, here’s what is being claimed, and what it would mean for you.

Viking Therapeutics reported to the SEC following a breach was listed on the alphv ransomware leak site. The group claims to have stolen internal data.
— from Alphv’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

Viking Therapeutics reported to the SEC following a breach Listed by ALPHV Ransomware Group

On December 18, 2023, biotechnology company Viking Therapeutics appeared on the leak site of the Alphv ransomware group. The listing states that internal files were exfiltrated during a ransomware attack, although the exact number of records and specific data types remain undisclosed in the public posting.

Already exposed?

You can’t unleak data. You can take away what it’s worth.

A leaked record is where it starts, not where it ends. What turns it into your front door is the look-up sites publishing your address beside your name — and those are what an AI reads when somebody asks about you. The free scan shows you both. We write to 580 companies.

See what is exposed about you — free scan →

Watch Viking Therapeutics

Get alerted the next time Viking Therapeutics files a breach with any US regulator — the filing, dated and sourced. A free single-company slice of Signals; no account needed.

We’ll email you only about Viking Therapeutics’s future breach filings and how to watch a whole vendor list — not general marketing. Unsubscribe any time.

Watching your whole vendor list (50 to 500 companies, by tier) is GalaxyWarden Signals.

Reported Details from the Listing

The Alphv leak site entry, still accessible via its onion address as of the initial disclosure, claims the group stole internal company data from Viking Therapeutics. The posting does not quantify affected records, list exact file types, or specify a ransom demand. Viking Therapeutics filed a notice with the SEC acknowledging the incident, confirming that an unauthorized party had accessed and exfiltrated data. No customer personal information is explicitly detailed in the primary listing, yet the nature of “internal files” in a publicly traded company typically includes documents that can contain employee or partner details.

Alphv gave the company a short window to respond before publishing samples, a standard pressure tactic used by the group. The disclosure indicates the breach occurred prior to the December 18 listing, but the precise intrusion date is not stated.

Why This Matters for You and Your Family

When a company like Viking Therapeutics suffers a ransomware breach, the information stolen can easily include details that tie back to individuals. Employees, clinical trial participants, business partners, or anyone whose records sit inside corporate file shares may find their names, contact information, or other identifiers exposed. Even if the leak site does not publish every document, threat actors often sell or trade smaller slices of the data on underground forums. For ordinary people, this means another vector for phishing, identity theft, or unwanted solicitations that can affect your household finances and peace of mind.

You’ve used today’s 5 free articles · resets tomorrow

Create a free account to keep reading

The rest of this article comes straight back — free, no card, nothing you’ve already read goes away. Then see whether your own data is exposed too: the scan on this site is free with or without an account, and the account is what keeps the result after the emailed link expires.

Reading this for a company?

GalaxyWarden Signals watches the organisations you name and emails you when one of them actually discloses — SEC 8-K Item 1.05 filings and corroborated breach records, with a JSON API. It monitors companies, not people: it does not scan you and does not remove your personal data.

See GalaxyWarden Signals →

Or make a free reader account first

Free reader account

No card, no charge. You read the blog without a limit — every article, no daily count — and it saves your exposure-scan results so you can open them again after the emailed link expires. We won’t email you anything else unless you tick the box asking us to. The next step shows what the paid plans add — free stays the first option on it.

Create a free account →

Free accounts are for personal use. If you’re reading for a company, that’s Signals (terms).

Already have an account? Log in

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to Alphv · 727 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed December 18, 2023

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Threat-actor tracker

Alphv — 727 incidents tracked

Every breach we've attributed to Alphv, in one running log. See who else they've hit →

Related breaches

high October 01, 2026