Tenable Appoints Microsoft Cloud Security Veteran Vlad Korsunsky as Chief Technology Officer

Rhea-AI Summary

Tenable (NASDAQ: TENB) appointed Vlad Korsunsky as Chief Technology Officer and Managing Director of Tenable Israel effective Dec 15, 2025. Korsunsky will lead Tenable’s technical vision, platform strategy and AI strategy, including scaling the Tenable One Exposure Management Platform.

He reports to co-CEO Steve Vintz, is based at the Tel Aviv Innovation Center, and joins after more than a decade at Microsoft where he led cloud and enterprise security efforts. Korsunsky has over 25 years of software engineering and cybersecurity leadership experience.

Positive

• Appointed Vlad Korsunsky as CTO on Dec 15, 2025
• Will scale the Tenable One platform and advance AI strategy
• Korsunsky has 25+ years of engineering and cybersecurity experience
• Brings >10 years leadership experience from Microsoft cloud security

Negative

• None.

News Market Reaction

-5.82%

1 alert

-5.82% News Effect

On the day this news was published, TENB declined 5.82%, reflecting a notable negative market reaction.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

Leadership experience: Over 25 years

1 metrics

Leadership experience Over 25 years Vlad Korsunsky’s software engineering and cybersecurity experience

Market Reality Check

Price: $22.06 Vol: Trading volume of 1,145,9...

normal vol

$22.06 Last Close

Volume Trading volume of 1,145,962 shares is very close to the 20‑day average of 1,137,454, suggesting no unusual activity before the announcement. normal

Technical Shares at $26.28 are below the 200-day MA of $31.37 and sit 42.17% under the 52‑week high, but only 3.96% above the 52‑week low.

Peers on Argus

TENB was down 1.39% ahead of this news while peers showed mixed, mostly modest m...

TENB was down 1.39% ahead of this news while peers showed mixed, mostly modest moves: AVPT +0.22%, CALX -4.11%, EEFT -0.33%, RELY -2.27%, QLYS -0.37%. This points to stock-specific factors rather than a broad sector trend.

Historical Context

5 past events · Latest: Dec 11 (Positive)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Dec 11	Government cloud deal	Positive	-0.6%	FedRAMP-authorized cloud security offered to U.S. federal agencies via OneGov.
Nov 18	Investor conferences	Neutral	-1.0%	Management scheduled to present at two December 2025 investor conferences.
Nov 10	Industry recognition	Positive	-0.0%	Named Leader in Gartner 2025 Magic Quadrant for Exposure Assessment Platforms.
Oct 29	Q3 2025 earnings	Positive	-5.6%	Double-digit revenue growth and return to GAAP profitability with share repurchases.
Oct 15	Earnings notice	Neutral	+0.7%	Announcement of timing and access details for Q3 2025 earnings release and call.

Pattern Detected

Recent news, including positive items like leadership recognition and government wins, has often been followed by flat to negative price reactions, with an earnings beat seeing the sharpest decline.

Recent Company History

Over the last few months, Tenable has reported several notable developments. On Oct 29, 2025, Q3 2025 results showed revenue of $252.4M and GAAP net income of $2.3M, yet the stock fell 5.63%. Subsequent recognition as a Leader in Gartner’s 2025 Magic Quadrant on Nov 10 and a FedRAMP-focused OneGov agreement on Dec 11 saw essentially flat to slightly negative moves. Today’s CTO appointment fits into a pattern of strategic, generally positive news against a backdrop of muted or negative price follow‑through.

Market Pulse Summary

The stock moved -5.8% in the session following this news. A negative reaction despite the high-profi...

Analysis

The stock moved -5.8% in the session following this news. A negative reaction despite the high-profile CTO appointment would fit a recent pattern where constructive news, including improved earnings and industry recognition, preceded lackluster performance. With the stock already 42.17% under its 52‑week high and below its 200-day MA, sentiment appeared fragile beforehand. Investors may have focused on broader concerns around growth or valuation, and prior divergence after good news highlights the risk of continued skepticism.

Key Terms

exposure management, attack surface, platform strategy, ai, +2 more

6 terms

exposure management technical

"Tenable®, the exposure management company, today announced it has appointed..."

Exposure management is the ongoing process a business or investor uses to find, measure, and control the ways losses could happen from market moves, counterparty problems, cash shortages or operational failures. It matters because it reduces the chance that an unexpected event wipes out value—like steering a ship to avoid storms—so investors can better predict potential losses, protect returns, and align risk with their goals and rules.

attack surface technical

"vision to secure the modern attack surface."

The attack surface is the collection of points where a company's digital systems, devices, or networks can be accessed, misused, or breached — think of it as the number of doors and windows a thief could try. A larger or more complex attack surface raises the chance of a costly security breach, which can lead to direct losses, regulatory fines, and damage to customer trust and the company's stock value, so investors watch it as a measure of operational and cybersecurity risk.

platform strategy technical

"responsible for the company’s technical vision, platform strategy and innovation"

A platform strategy is a business approach where a company builds and runs a shared space — often digital — that connects different groups such as customers, sellers, developers or service providers so they can transact, share or build on top of it. It matters to investors because successful platforms can grow quickly, lock in users, and generate recurring revenue and higher profit margins the more people use them, much like a shopping mall or app store becomes more valuable as more stores and shoppers join.

ai technical

"advancing the company’s AI strategy."

Artificial intelligence (AI) is technology that enables machines to mimic human thinking and learning, allowing them to analyze information, recognize patterns, and make decisions. For investors, AI matters because it can improve how businesses operate, create new products, or identify opportunities faster and more accurately than humans alone, potentially impacting company success and market trends.

multi-cloud security technical

"global multi-cloud security, enterprise AI security and exposure management businesses."

Multi-cloud security is the set of practices, tools and policies used to protect data, applications and access when a business uses more than one cloud supplier. Like installing a coordinated alarm system across several rented apartments, it ensures consistent defenses, controls and compliance across different platforms so that sensitive information stays safe and systems stay running. Investors care because weak or inconsistent protection can lead to outages, regulatory fines, higher costs and damage to reputation, all of which can hurt returns.

ai risk management technical

"especially with rising demand for AI risk management."

AI risk management is the set of practices a business uses to identify, reduce and monitor harms that can come from using artificial intelligence, including errors, bias, data breaches, and broken systems. It matters to investors because good risk management is like a reliable maintenance and insurance plan: it lowers the chance of costly mistakes, regulatory fines, or reputation damage that can cut profits and share value, and makes future growth from AI more dependable.

AI-generated analysis. Not financial advice.

Visionary and transformative leader to drive Tenable’s next phase of AI and platform innovation

COLUMBIA, Md., Dec. 15, 2025 (GLOBE NEWSWIRE) -- Tenable® Holdings, Inc. (NASDAQ: TENB), the exposure management company, today announced it has appointed Vlad Korsunsky as Chief Technology Officer and Managing Director of Tenable Israel. Korsunsky’s arrival marks a significant milestone for Tenable, accelerating the company’s exposure management vision to secure the modern attack surface. As the strategic leader of Tenable’s long-term technology future, Korsunsky will be responsible for the company’s technical vision, platform strategy and innovation, including scaling the Tenable One Exposure Management Platform and advancing the company’s AI strategy. He reports to Tenable co-CEO Steve Vintz and is based at the Tenable Israel Innovation Center in Tel Aviv.

Korsunsky joins Tenable after more than a decade at Microsoft, where he served as the Corporate Vice President of Cloud and Enterprise Security, and was responsible for building and leading the company's global multi-cloud security, enterprise AI security and exposure management businesses. During his tenure, Korsunsky was instrumental in shaping Microsoft's security strategy for AI and driving the creation of disruptive new business lines. Korsunsky has over 25 years of leadership experience in software engineering and cybersecurity.

“Vlad is a visionary technology leader who has operated and succeeded at the highest levels of the industry,” said Vintz. “As we boldly advance our exposure management vision, he is exactly the leader we need to accelerate our platform leadership, especially with rising demand for AI risk management. We’re fortunate to have him driving our technology strategy so we can deliver even greater value to our customers.”

“Tenable is the defining leader in exposure management, with unmatched breadth and depth of coverage, analytics and expertise,” said Korsunsky. “We are uniquely positioned for this moment, where AI is not only reshaping how we work, but also the attack landscape and how it is defended. I’m energized by the opportunity ahead, and I look forward to working with this talented team to deliver solutions and a future that makes a real difference for our customers.”

Korsunsky holds a B.S. in Computer Science and Applied Mathematics from Bar-Ilan University and an M.S. in Computer Science from Reichman University.

About Tenable
Tenable® is the exposure management company, exposing and closing the cybersecurity gaps that erode business value, reputation and trust. The company’s AI-powered exposure management platform radically unifies security visibility, insight and action across the attack surface, equipping modern organizations to protect against attacks from IT infrastructure to cloud environments to critical infrastructure and everywhere in between. By protecting enterprises from security exposure, Tenable reduces business risk for approximately 44,000 customers around the globe. Learn more at tenable.com.

Media Contact:
Tenable
tenablepr@tenable.com

FAQ

Who did Tenable name as CTO on Dec 15, 2025 (TENB)?

Tenable appointed Vlad Korsunsky as Chief Technology Officer and Managing Director of Tenable Israel.

What responsibilities will Vlad Korsunsky have at Tenable (TENB)?

He will lead technical vision, platform strategy, innovation, scale the Tenable One platform, and advance the company’s AI strategy.

Who does the new CTO report to at Tenable (TENB)?

Korsunsky reports to Tenable co-CEO Steve Vintz.

Where will Tenable’s new CTO be based and what role will he hold there (TENB)?

He is based at the Tenable Israel Innovation Center in Tel Aviv and serves as Managing Director of Tenable Israel.

What relevant experience does Vlad Korsunsky bring to Tenable (TENB)?

He has over 25 years of software engineering and cybersecurity leadership and spent more than a decade as Corporate VP of Cloud and Enterprise Security at Microsoft.