Annexon, Inc. Files 8-K: Material Definitive Agreement

Ticker: ANNX · Form: 8-K · Filed: Nov 14, 2025 · CIK: 1528115

Sentiment: neutral

Topics: material-definitive-agreement, filing, corporate-event

TL;DR

Annexon signed a big deal, check the 8-K for details.

AI Summary

On November 12, 2025, Annexon, Inc. entered into a Material Definitive Agreement. The filing also indicates other events and the submission of financial statements and exhibits. The company is incorporated in Delaware and its principal executive offices are located in Brisbane, California.

Why It Matters

This 8-K filing signals a significant contractual development for Annexon, Inc., potentially impacting its business operations and financial standing.

Risk Assessment

Risk Level: medium — Material definitive agreements can introduce new risks or opportunities that require careful evaluation.

Key Numbers

Key Players & Entities

FAQ

What is the nature of the Material Definitive Agreement entered into by Annexon, Inc. on November 12, 2025?

The filing states that Annexon, Inc. entered into a Material Definitive Agreement on November 12, 2025, but the specific details of this agreement are not provided in the excerpt.

What other events are reported in this 8-K filing?

Besides the entry into a Material Definitive Agreement, the filing also reports 'Other Events' and the submission of 'Financial Statements and Exhibits'.

When was this 8-K report filed with the SEC?

This 8-K report was filed as of November 14, 2025.

What is Annexon, Inc.'s principal business address?

Annexon, Inc.'s principal executive offices are located at 1400 Sierra Point Parkway, Bldg C, Suite 200, Brisbane, California 94005.

What is Annexon, Inc.'s fiscal year end?

Annexon, Inc.'s fiscal year ends on December 31.

Filing Stats: 1,332 words · 5 min read · ~4 pages · Grade level 11.7 · Accepted 2025-11-14 16:41:09

Key Financial Figures

Filing Documents

Financial Statements and Exhibits

Financial Statements and Exhibits. (d) Exhibits Exhibit Number Exhibit Description 1.1 Underwriting Agreement, dated November 12, 2025, by and among the Company, Goldman Sachs & Co. LLC, TD Securities (USA) LLC and Wells Fargo Securities, LLC. 4.1 Form of Pre-Funded Warrant. 5.1 Opinion of Cooley LLP. 23.1 Consent of Cooley LLP (included in Exhibit 5.1). 99.1 Pricing Press Release, dated November 12, 2025. 99.2 Closing Press Release, dated November 14, 2025. 104 Cover Page Interactive Data File (formatted as inline XBRL).

SIGNATURES

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. Annexon, Inc. Date: November 14, 2025 By: /s/ Jennifer Lew Jennifer Lew Executive Vice President and Chief Financial Officer

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