Zacks

Disclosed Jun 10, 20238,929,503 accountsUnverified

In December 2022, the investment research company Zacks announced a data breach . The following month, reports emerged of the incident impacting 820k customers . However, in June 2023, a corpus of data with almost 9M Zacks customers appeared before being broadly circulated on a popular hacking forum. The most recent data was dated May 2020 and included names, usernames, email and physical addresses, phone numbers and passwords stored as unsalted SHA-256 hashes. On disclosure of the larger breach, Zacks advised that in addition to their original report "the unauthorised third parties also gaine

What is known

People affected	8,929,503 (accounts in the leaked data, per Have I Been Pwned)
Disclosed	Jun 10, 2023
Happened	May 10, 2020
Attack	Hacking
Data exposed	EmailsNamesPasswordsPhone numbersAddresses
Sector	Tech
Status	Unverified: not yet confirmed by an official notice, a filing or the organization
Check your email	Have I Been Pwned

Sources

Aggregatorhaveibeenpwned.com

Have I Been Pwned: Zacks

Notices filed

Accounts in the dataJun 10, 2023

Have I Been Pwned8,929,503 people

Other breaches at Zacks

Hacker leaks data of 12 million Zacks accountsHacking exposed emails, IP addresses, names, passwords, phone numbers, addresses and source code.Hacking12M accountsFinanceUSUnverifiedFeb 12, 2025

History of this record

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (Have I Been Pwned). Record counts are as reported. Not legal advice.

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