Rankiteo Logo
Rankiteo
Leader in Cyber Underwriting
Loading...
NEWRankiteo Cyber Underwriting Desktop - Score, price, and bind from your desktop
WindowsmacOSLinux
Download
Macmillan

Macmillan Vendor Cyber Rating & Cyber Score

macmillan.com
in
Add Your Compliance Badge
ISO 27001
SOC 2 Type 1
SOC 2 Type 2
PCI DSS
HIPAA
GDPR

We deeply believe in the power of books to connect people, amplify diverse voices, create meaningful change, and make a lasting impact in the world. Macmillan Publishers is a leading publishing company and home to some of the world's most cherished authors and creators. We are firmly committed to our employees, authors, and core values — and strive to build a culture that is inclusive of diverse voices and perspectives throughout all levels of the company. Our U.S. publishers include Celadon Books, Farrar, Straus and Giroux, Flatiron Books, Henry Holt & Company, Macmillan Audio, Macmillan Children’s Publishing Group, The St. Martin's Publishing Group, and Tor Publishing Group. Macmillan Publishers is an Equal Opportunity Employer


Macmillan A.I CyberSecurity Scoring

Incident Details
Macmillan
Company Information
Website:https://us.macmillan.com/
Employees number:2,685
Number of followers:215,798
NAICS:511
Industry Type:Book and Periodical Publishing
Homepage:macmillan.com
Cyber Premium EstimationGet Supply Chain
Macmillan Risk Score (AI oriented)
Between 650 and 699
logo
MacmillanBook and Periodical Publishing
Updated:
29/03/2026
694/1000
Weak
B
AaaAaABaaBaBCaaCaC
Powered by our proprietary A.I cyber incident model
✖ Insurance prefers TPRM score to calculate premium
Macmillan Global Score (TPRM)
xxxx
logo
MacmillanBook and Periodical Publishing
•••
Score locked
Instant access to detailed risk factors
Vulnerabilities
Benchmark vs. industry & size peers
Findings

Macmillan
MacmillanWeak
Current Score
694B (WEAK)
01000
2 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
SEPTEMBER 2026
702Before Incident
AUGUST 2026
701Before Incident
JULY 2026
699Before Incident
JUNE 2026
698Before Incident
MAY 2026
697Before Incident
APRIL 2026
696Before Incident
MARCH 2026
694Before Incident
FEBRUARY 2026
693Before Incident
JANUARY 2026
692Before Incident
DECEMBER 2025
688Before Incident
NOVEMBER 2025
688Before Incident
OCTOBER 2025
687Before Incident
DECEMBER 2022
676Before Incident
Breach
01 Dec 2022 • Macmillan
Macmillan

Macmillan Data Breach

607After Incident
CRITICAL-69
MAC224781222
Macmillan suffered a data breach after an unauthorized party was able to bypass its data security system and gain access to sensitive consumer information on the company’s computer system. The breach compromised the consumer names, addresses, Social Security numbers, driver’s license numbers and financial account information of about 1,193 victims. Macmillan took all affected servers offline and began investigating the incident and sent out data breach letters to all affected parties.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
Consumer namesAddressesSocial Security numbersDriver’s license numbersFinancial account information
DATA BREACH
Consumer namesAddressesSocial Security numbersDriver’s license numbersFinancial account informationSensitivity Of Data: High
REFERENCES
Blog URLSource URL
JUNE 2022
768Before Incident
Ransomware
01 Jun 2022 • Macmillan
Macmillan

Macmillan Ransomware Attack

664After Incident
CRITICAL-104
MAC1626722
Publishing giant Macmillan fell victim to a ransomware attack which forced it to shut down its network and offices while recovering from a security incident. The attack involved the encryption of certain files on our network after which agents and clients that they have lost access to their systems, emails, and files. The company shut down all of its IT systems to prevent the spread of the attack and investigated the incident and restored the systems.
INCIDENT DETAILS -
TYPE
Ransomware
IMPACT
IT systemsemailsfiles
DATA BREACH
Data Encryption: Certain files on the network
REFERENCES
Blog URLSource URL

Frequently Asked Questions

?
What is the current A.I Rankiteo Cyber Score for Macmillan ?
?
What was Macmillan's A.I Rankiteo Cyber Score in August 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in July 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in June 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in May 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in April 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in March 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in February 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in January 2026 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in December 2025 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in November 2025 ?
?
What was Macmillan's A.I Rankiteo Cyber Score in October 2025 ?
?
What is the average per-incident point impact on Macmillan's A.I Rankiteo Cyber Score over the past 12 months ?
?
Where can I access detailed records of all cyber incidents associated with Macmillan ?
?
Where can I find a summary of the A.I Rankiteo Risk Scoring methodology ?
?
Where can I view Macmillan's profile page on Rankiteo ?
?
How accurate is the A.I Rankiteo Risk Scoring methodology ?