# EDGAR Filing Document

**Accession Number:** 0001048695
**File Stem:** 0001048695-25-000143
**Filing Date:** 2025-9
**Character Count:** 12450
**Document Hash:** 952e27d35b730fdb2d847aac4c212c06
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001048695-25-000143.hdr.sgml**: 20250911

**ACCESSION NUMBER**: 0001048695-25-000143

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20250911

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250911

**DATE AS OF CHANGE**: 20250911

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** F5, INC.
- **CENTRAL INDEX KEY:** 0001048695
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMPUTER COMMUNICATIONS EQUIPMENT [3576]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 911714307
- **STATE OF INCORPORATION:** WA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-26041
- **FILM NUMBER:** 251307372

**BUSINESS ADDRESS:**
- **STREET 1:** 801 5TH AVENUE
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98104
- **BUSINESS PHONE:** 2062725555

**MAIL ADDRESS:**
- **STREET 1:** 801 5TH AVENUE
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98104

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** F5 NETWORKS, INC.
- **DATE OF NAME CHANGE:** 20190625

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** F5 NETWORKS INC
- **DATE OF NAME CHANGE:** 19990308

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** F5 LABS INC
- **DATE OF NAME CHANGE:** 19990305

?xml version='1.0' encoding='ASCII'? ffiv-20250911

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**FORM 8-K** 

**CURRENT REPORT**

 **Pursuant to Section 13 or 15(d) of the**

 **Securities Exchange Act of 1934**

**Date of Report (Date of Earliest Event Reported):**

**September 11, 2025** 

**F5, Inc.** 

(Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| Washington | 000-26041 | 91-1714307 |
| (State or other jurisdiction | (Commission | (IRS Employer |
| of incorporation) | File Number) | Identification No.) |

---

---

| | | | |
|:---|:---|:---|:---|
| 801 5th Avenue | 801 5th Avenue | 801 5th Avenue | |
| Seattle | , | WA | 98104 |
| (Address of principal executive offices) | (Address of principal executive offices) | (Address of principal executive offices) | (Zip Code) |

---

Registrant's telephone number, including area code (206) 272-5555

Not Applicable

Former name or former address, if changed since last report

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common stock, no par value | FFIV | NASDAQ Global Select Market |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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| | |
|:---|:---|
| **Item 7.01** | **Regulation FD Disclosure** |

---

On September 11, 2025, F5, Inc. ("F5") issued a press release announcing the entry into an acquisition arrangement with Calypso AI Corp, a Delaware corporation ("Calypso AI"), pursuant to which, subject to the terms and conditions thereof, Calypso AI will become a direct, wholly owned subsidiary of F5. A copy of this press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K (the "Report") and incorporated by reference herein.

The information contained in Item 7.01 of this Report, including Exhibit 99.1, shall not be incorporated by reference into any filing of the registrant, whether made before, on or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information contained in Item 7.01 of this Report, including Exhibit 99.1, shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits** |

---

(d) Exhibits:

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| | |
|:---|:---|
| 99.1 | [Press Release, dated September](ex991-item7019112025.htm)[1](ex991-item7019112025.htm)[1](ex991-item7019112025.htm)[, 2025.](ex991-item7019112025.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
| | F5, INC.<br> (Registrant) | F5, INC.<br> (Registrant) |
| Date: September 11, 2025 | By: | */s/ François Locoh-Donou* |
|  |  | François Locoh-Donou |
|  |  | President and Chief Executive Officer |

---

## Exhibit 99.1

---

| | |
|:---|:---|
| **CONTACTS:** | |
| ***Media*** | |
| Dan Sorensen | Holly Lancaster |
| F5 | WE Communications |
| (650) 228-4842 | (415) 547-7054 |
| <u>d.sorensen@f5.com</u> | <u>hluka@we-worldwide.com</u> |
| ***Investors*** |  |
| Suzanne DuLong |  |
| (206) 272-7049 |  |
| <u>s.dulong@f5.com</u> |  |

---

**F5 to acquire CalypsoAI to bring advanced AI guardrails to large enterprises**

***CalypsoAI's adaptive AI inference security solutions will enable companies to deliver AI apps more securely***

**SEATTLE, WASHINGTON AND DUBLIN, IRELAND - SEPTEMBER 11, 2025 -** F5 (NASDAQ: FFIV), the global leader in delivering and securing every app and API, today announced its intent to acquire a pioneer in enterprise AI security. CalypsoAI's award-winning platform brings real-time threat defense, red teaming at scale, and data security to enterprises racing to deploy generative and agentic AI. These capabilities will be integrated into the F5 Application Delivery and Security Platform (ADSP) to create the most complete solution for securing AI inference.

"AI is redefining enterprise architecture—and the attack surface companies must defend," said François Locoh-Donou, President and CEO of F5. "Traditional firewalls and point solutions can't keep up. The addition of CalypsoAI will give enterprises the confidence to innovate faster and better protect critical data as they rely on F5 to deliver and secure apps, APIs, and AI models across their environment."

Enterprises are rapidly embedding AI into products and operations, but the new AI stack—spanning applications, agents, APIs, models, and data stores—creates a new and highly dynamic attack surface. Traditional controls are not keeping pace with sophisticated new threats, while mounting regulatory pressure alongside the spread of shadow AI usage heightens risk and compliance gaps. Security teams need a purpose-built and model-agnostic approach that provides guardrails for how AI interacts with data, users, and threats and provides centralized visibility across their infrastructure.

In their recent Market Guide on AI Trust, Risk and Security Management (TRiSM), Gartner® states, "The AI TRiSM market is distinguished by its independence from frontier model provider solutions that also support trust risk and security management. Enterprises must retain independence from any single AI model or hosting provider to ensure scalability, flexibility, cost control and trust, as AI markets rapidly mature and change." <sup>i</sup>

F5 is aiming to tackle this need with CalypsoAI's adaptive AI security capabilities that deliver proactive and continuous AI protection regardless of model or cloud, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Adversarial threat protection: Protection against new AI threats like prompt injection and jailbreak attacks with real-time threat management. Proactive red-teaming tests against more than 10,000 new attack prompts each month to produce a risk score.

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Secure data: Guardrails detect and prevent sensitive data leakage and policy violations at runtime and audit AI interactions across models.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Unified visibility and governance: Centralized observability, policy control, and audit logs make it easier to meet GDPR/EU AI Act requirements across SaaS, on-premises, and hybrid environments.

"Enterprises want to move fast with AI while reducing the risk of data leaks, unsafe outputs, or compliance failures," said Donnchadh Casey, CEO of CalypsoAI. "Our customers rely on us to pressure test AI systems at scale, set inference layer guardrails that adapt as models change, and to gain visibility and auditability across their AI estate. F5 and CalypsoAI are more than the sum of their parts: high performance application delivery and AI security that enable businesses to deliver innovation faster without increasing risk."

**Transaction details** 

F5 will acquire all issued and outstanding shares of CalypsoAI, a private company with major operations in Dublin, Ireland for $180 million in purchase consideration financed primarily with cash. The transaction is expected to be immaterial to F5's revenue and operating results.

The acquisition is subject to customary closing conditions and is expected to close in F5's fourth quarter fiscal year 2025, ending September 30, 2025.

Foros Advisors LLC acted as financial advisor to F5 while Sullivan & Cromwell LLP acted as legal advisor. Cooley LLP provided legal counsel to CalypsoAI.

**Supporting Resources** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• CalypsoAI landing page

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Gartner Market Guide for AI Trust, Risk and Security Management (TRiSM)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Blog Post: Securing AI models and agents without compromise

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Blog Post: How does SecOps feel about AI?

**About F5**

F5, Inc. (NASDAQ: FFIV) is the global leader that delivers and secures every app. Backed by three decades of expertise, F5 has built the industry's premier platform—F5 Application Delivery and Security Platform (ADSP)—to deliver and secure every app, every API, anywhere: on-premises, in the cloud, at the edge, and across hybrid, multicloud environments. F5 is committed to innovating and partnering with the world's largest and most advanced organizations to deliver fast, available, and secure digital experiences. Together, we help each other thrive and bring a better digital world to life.

**About CalypsoAI** 

CalypsoAI provides the only full-lifecycle platform to secure AI models and applications at the inference layer, deploying Agentic Warfare™ to protect organizations from evolving adversaries. Trusted by global enterprises including Palantir and SGK, CalypsoAI's industry-leading team of experts is doing the hard miles to ensure security keeps pace with AI innovation.

CalypsoAI was founded in 2018 and has secured over $40 million in venture funding from investors including Paladin Capital Group, Lockheed Martin Ventures and Hakluyt Capital. CalypsoAI was a Top-Two Finalist in the 2025 RSAC Innovation Sandbox contest and one of Fast Company's Most Innovative Companies in AI for 2025.

Source: F5, Inc.

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*Forward-Looking Statements*

 

<sup>i</sup> Gartner, Market Guide for AI Trust, Risk, and Security Management, 18 February 2025.

GARTNER is a registered trademark and service mark of Gartner, Inc. and/or its affiliates in the U.S. and internationally and is used herein with permission. All rights reserved.

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