• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
NewslettersCFO Daily

Horizon3.ai taps veteran CFO as cybersecurity startup bridging military intelligence and Silicon Valley scales up

Sheryl Estrada
By
Sheryl Estrada
Sheryl Estrada
Senior Writer and author of CFO Daily
Down Arrow Button Icon
August 19, 2025, 7:36 AM ET
Holly Grey, CFO of Horizon3.ai
Holly Grey, CFO of Horizon3.aiCourtesy of Horizon3.ai

Good morning. Warding off cyberattacks and digital conflict has become central to economic and business strategy.

Recommended Video

Horizon3.ai, a cybersecurity startup that includes talent that worked for the CIA and U.S. Special Operations Command, has appointed a new finance chief. Holly Grey joins as its first CFO, bringing more than 30 years of experience in public company operations, compliance, and strategic finance.

Before joining Horizon3.ai, Grey served as CFO at Exabeam, where she led the company’s transition to a cloud-native model, improved margins, and helped position Exabeam for acquisition by Thoma Bravo. Previously, at Forescout Technologies, she built financial operations supporting its 2017 IPO and eventual acquisition by Advent International.

“There’s a tremendous product fit with Horizon3.ai in the market,” Grey said. “They’ve done an incredible job of scaling to this point.” She was drawn to the company’s trust-based culture led by CEO Snehal Antani and his team. When trust comes from the top, everyone can contribute to the company’s success, which is powerful, Grey said.

Founded in 2019, Horizon3.ai announced a $100 million Series D funding round in June, led by NEA, with participation from Qualcomm Ventures, NightDragon, SignalFire, Craft Ventures, and 9Yards Capital. The company previously raised $40 million in a Series C round in August 2023. Horizon3.ai reported 101% year-over-year revenue growth, is Rule of 40 positive, and has completed more than 150,000 autonomous penetration tests—simulated cyberattacks—worldwide, according to the company.

Holly Grey, CFO of Horizon3.ai
Courtesy of Horizon3.ai

Regarding Grey’s appointment, Antani said she “knows what it takes to lead through complexity, drive operational discipline, and navigate both public and private markets.” He added that her leadership will be essential for global expansion and positioning Horizon3.ai as a leader in offensive security.

Maintaining momentum

Business leaders today are acutely aware of how state and non-state actors exploit vulnerabilities to maximize disruption through cyberattacks. Antani recently told Fortune’s Diane Brady the defense industry now serves as a template for threat identification and asset protection in the private sector.

Antani, who previously served as the first CTO of the Joint Special Operations Command (2018–2021) and as CTO at Splunk, has built Horizon3.ai’s team, inclusive of experts from the National Security Agency, CIA, and business operations. His goal: to bridge the gap between military intelligence and Silicon Valley, leveraging AI agents to identify and solve emerging threats.

Grey told me that no matter what job function of an organization you work in, “we all need to be focused on cybersecurity.” She’s most often seen this priority overlooked when it comes to third-party vendors.

“At every organization I’ve been a part of, CFOs play a strategic role in the company’s purchasing decisions,” Grey said. “I urge peers and our customers to take a critical eye on third-party vendors to make sure they’re as focused on security as we are.”

As CFO of Horizon3.ai, Grey is focused on building scalable systems and processes that grow with the company, because strong foundations are set only once, she explained. It’s like surfing—you want to stay just ahead of the wave for balance, but not so far ahead that you lose momentum, she said. 

Sheryl Estrada
sheryl.estrada@fortune.com

Leaderboard

Neil Thomson was appointed CFO of Soho House & Co (NYSE: SHCO), effective Aug. 18. Thomson will succeed Thomas Allen, who will remain with the company through Aug. 29. Thomson has 30 years of experience. He most recently served as CFO of Tasty Restaurant Group. Before that, he was CFO of Del Frisco’s. Thomson also held several senior management positions during 15 years at Yum! Brands, including CFO of India, chief development officer of Pizza Hut International, and chief growth officer of Pizza Hut Asia. The Soho House is set to be taken private by hotel operator MCR Hotels in a deal worth $2.7 billion. 

George Eldridge was appointed CFO of Abcuro, Inc., a clinical-stage biotechnology company. Eldridge brings more than 30 years of experience. He most recently served as CFO of Aerovate Therapeutics, guiding the company through its IPO in 2021 and subsequent reverse merger with Jade Biosciences in 2025. Eldridge has also previously served as CFO at Proteon Therapeutics, Targanta Therapeutics, Therion Biologics, Curis (formerly Ontogeny), and Boston Life Sciences.

Big Deal

How is executive pay evolving in today’s business landscape? Korn Ferry’s latest Global Total Rewards Pulse Survey offers insights into what organizations can expect for salary increases in 2026.

Some key findings: Despite 88% of companies anticipating revenue growth, one-third have already reduced salary budgets due to economic uncertainty, potentially creating tension between talent retention and cost management. Fifty-four percent of respondents report that executive pay is only “somewhat aligned” with broader employee compensation. Just 27% see meaningful alignment between performance and pay levels, suggesting that compensation committees may be approving increases without rigorous performance justification, according to the report.

The survey collected responses from more than 3,800 HR and total rewards leaders across over 130 countries.

Going deeper

"Sam Altman admits OpenAI ‘totally screwed up’ its GPT-5 launch and says the company will spend trillions of dollars on data centers" is a Fortune report by Eva Roytburg.

From the report: "Sam Altman said GPT-5’s launch was botched after backlash over the model’s colder persona forced OpenAI to reinstate GPT-4o for users. He also predicted OpenAI will need to spend trillions on data centers to scale ChatGPT. In addition, Altman is eyeing brain-computer interfaces, a possible Chrome acquisition, and AI-driven social media, while conceding we may be in an AI bubble." Read more here. 

Overheard

“If we allow our cybersecurity information sharing framework to collapse, it will devastate small businesses, endanger the sick, and undermine America’s position as the global leader in cybersecurity.”

— Cynthia Kaiser, SVP of Halcyon’s Ransomware Research Center, warns in a Fortune opinion piece that the Cybersecurity Information Sharing Act of 2015 is set to expire on Sept. 30. Kaiser calls it “one of America’s most vital cybersecurity protections” and the “backbone of our nation’s cyber defense.” She formerly served as deputy director of the FBI’s cyber division.

This is the web version of CFO Daily, a newsletter on the trends and individuals shaping corporate finance. Sign up for free.
About the Author
Sheryl Estrada
By Sheryl EstradaSenior Writer and author of CFO Daily
LinkedIn iconTwitter icon

Sheryl Estrada is a senior writer at Fortune, where she covers the corporate finance industry, Wall Street, and corporate leadership. She also authors CFO Daily.

See full bioRight Arrow Button Icon

Latest in Newsletters

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map

© 2025 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.


Latest in Newsletters

NewslettersMPW Daily
Your predictions for women, AI, and the workplace in 2026
By Emma HinchliffeDecember 24, 2025
8 days ago
Vanguard CIO Nitin Tandon.
NewslettersCIO Intelligence
How investment giant Vanguard’s CIO is placing big tech bets today to create the AI digital advisor of tomorrow
By John KellDecember 24, 2025
8 days ago
NewslettersCFO Daily
How AI is redefining finance leadership: ‘There has never been a more exciting time to be a CFO’
By Sheryl EstradaDecember 24, 2025
8 days ago
NewslettersCEO Daily
Expedia CEO Ariane Gorin on the fight to ensure AI doesn’t turn her brands into invisible pipes consumers never see
By Diane BradyDecember 24, 2025
8 days ago
NewslettersTerm Sheet
The AI startups founders and VCs say could be acquisition targets in 2026
By Allie GarfinkleDecember 24, 2025
8 days ago
Thierry Breton, former European Commissioner for the Internal Market, in Paris on June 13, 2025. (Photo: Thomas Samson/AFP/Getty Images)
NewslettersFortune Tech
U.S. denies visas for five Europeans, alleging American censorship
By Andrew NuscaDecember 24, 2025
8 days ago

Most Popular

placeholder alt text
Europe
George Clooney moves to France and sends a strong message about the American Dream
By Nick LichtenbergDecember 30, 2025
2 days ago
placeholder alt text
Environment
'I opened her door and the wind caught me, and I went flying': The U.S. Arctic air surge is sweeping northerners off their feet
By Holly Ramer and The Associated PressDecember 30, 2025
2 days ago
placeholder alt text
Success
Gen Z could wave goodbye to résumés because most companies have turned to skills-based recruitment—and find it more effective, research shows
By Orianna Rosa RoyleDecember 29, 2025
3 days ago
placeholder alt text
Health
Lay's drastically rebrands after disturbing finding: 42% of consumers didn't know their chips were made out of potatoes
By Matty Merritt and Morning BrewDecember 31, 2025
18 hours ago
placeholder alt text
C-Suite
Exiting CEO left each employee at his family-owned company a $443,000 gift—but they have to stay 5 more years to get all of it
By Nick LichtenbergDecember 30, 2025
2 days ago
placeholder alt text
Retail
Starbucks CEO Brian Niccol says a Reddit thread about people interviewing at the company convinced him his 'Back to Starbucks' plan is working
By Sasha RogelbergDecember 31, 2025
19 hours ago