STOCK TITAN

Major Kezar (KZR) shareholder signs merger support pact and drops bid

(Moderate)
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Tang Capital Management and related entities filed an amended Schedule 13D for Kezar Life Sciences. They report beneficial ownership of 664,314 shares of Kezar common stock, representing 9.0% of the outstanding shares based on 7,371,527 shares as of March 23, 2026.

On March 30, 2026, the reporting persons entered into a tender and support agreement related to an Agreement and Plan of Merger among Kezar and Aurinia-affiliated entities. Under this agreement, they agreed to tender all of their Kezar shares, subject to specified exceptions, and accepted restrictions on actions involving these shares. Concentra Biosciences also rescinded its prior proposal to acquire 100% of Kezar’s equity. The group reports no Kezar share transactions in the past 60 days.

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Insights

Large Kezar holder supports Aurinia merger and withdraws its own bid.

The filing shows Tang Capital Management and affiliated entities holding 664,314 Kezar shares, or 9.0% of the company based on 7,371,527 shares outstanding as of March 23, 2026. This makes them a significant shareholder in the merger context.

They signed a tender and support agreement on March 30, 2026, committing to tender all of their Kezar shares in connection with the Merger Agreement involving Aurinia entities and Kezar. This aligns a major holder in favor of the deal and places limits on actions they can take with these shares.

The filing also notes that Concentra Biosciences, one of the reporting entities, has rescinded its earlier proposal to acquire all of Kezar’s equity. That withdrawal reduces competing deal uncertainty and clarifies that the reporting group is now supporting the Aurinia transaction rather than pursuing an alternative acquisition path.

Beneficial ownership 664,314 shares Aggregate Kezar common shares beneficially owned by reporting persons
Percent of class 9.0% Portion of Kezar common stock represented by 664,314 shares
Shares outstanding 7,371,527 shares Kezar common stock outstanding as of March 23, 2026
TCPI holdings 272,272 shares Tang Capital Partners International, LP beneficial ownership (3.7% of class)
TCP III holdings 392,042 shares Tang Capital Partners III, Inc. beneficial ownership (5.3% of class)
Event date March 30, 2026 Date triggering amended Schedule 13D and tender/support agreement
Schedule 13D regulatory
"This /A (this "Statement") amends the (the "Original ") filed on October 8, 2024."
A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.
tender and support agreement regulatory
"the Reporting Persons entered into a tender and support agreement (attached as Exhibit 4)"
Agreement and Plan of Merger regulatory
"in connection with the execution of the Agreement and Plan of Merger, dated as of March 30, 2026"
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
beneficially own financial
"As of the date hereof the Reporting Persons beneficially own an aggregate of 664,314 shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
percent of class financial
"Percent of class represented by amount in Row (11) 9.0 %"
Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What ownership stake in Kezar Life Sciences (KZR) does Tang Capital report?

Tang Capital and related entities report beneficial ownership of 664,314 Kezar shares, representing 9.0% of the outstanding common stock. This percentage is based on 7,371,527 shares outstanding as of March 23, 2026, according to Kezar’s Form 10-K.

What agreement did Tang Capital enter regarding the Kezar (KZR) and Aurinia merger?

On March 30, 2026, the reporting persons entered a tender and support agreement tied to an Agreement and Plan of Merger among Kezar and Aurinia entities. They agreed to tender all their Kezar shares and accept certain restrictions on actions involving these shares.

Did Concentra Biosciences keep its proposal to acquire Kezar Life Sciences (KZR)?

No. The filing states that Concentra Biosciences has rescinded its acquisition proposal to buy 100% of Kezar’s equity. That proposal was originally sent on October 8, 2024, and its withdrawal clarifies Concentra is no longer pursuing a standalone acquisition.

Have Tang Capital and affiliates traded Kezar (KZR) shares recently?

The reporting persons state there have been no transactions in Kezar common stock by them during the past 60 days. Their reported position of 664,314 shares, or 9.0% of the class, reflects holdings without recent trading activity over that period.

Which entities are included as reporting persons in this Kezar (KZR) Schedule 13D/A?

Reporting persons include Tang Capital Management, LLC, Kevin Tang, Tang Capital Partners, LP, Tang Capital Partners International, LP, Tang Capital Partners III, Inc., Tang Capital Partners IV, Inc., and Concentra Biosciences, LLC. Their roles and control relationships are detailed in Item 2 of the filing.





49372L209

(CUSIP Number)
Kevin Tang
4747 Executive Drive, Suite 210
San Diego, CA, 92121
858-200-3830

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
03/30/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D




Comment for Type of Reporting Person:
Tang Capital Management, LLC ("TCM") shares voting and dispositive power over such shares with Tang Capital Partners III, Inc. ("TCP III"), Tang Capital Partners International, LP ("TCPI") and Kevin Tang. The percentages used herein are based on 7,371,527 shares of Common Stock outstanding as of March 23, 2026, as set forth in the Issuer's Annual Report filed on Form 10-K that was filed with the Securities and Exchange Commission on March 27, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Kevin Tang shares voting and dispositive power over such shares with TCPI, TCP III and TCM.


SCHEDULE 13D






SCHEDULE 13D




Comment for Type of Reporting Person:
TCPI shares voting and dispositive power over such shares with TCM and Kevin Tang.


SCHEDULE 13D




Comment for Type of Reporting Person:
TCP III shares voting and dispositive power over such shares with TCM and Kevin Tang.


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


TANG CAPITAL MANAGEMENT, LLC
Signature:/s/ Kevin Tang
Name/Title:Manager
Date:04/01/2026
KEVIN TANG
Signature:/s/ Kevin Tang
Name/Title:Self
Date:04/01/2026
TANG CAPITAL PARTNERS, LP
Signature:/s/ Kevin Tang
Name/Title:Manager, Tang Capital Management, LLC, General Partner
Date:04/01/2026
TANG CAPITAL PARTNERS INTERNATIONAL, LP
Signature:/s/ Kevin Tang
Name/Title:Manager, Tang Capital Management, LLC, General Partner
Date:04/01/2026
TANG CAPITAL PARTNERS III, INC
Signature:/s/ Kevin Tang
Name/Title:Chief Executive Officer
Date:04/01/2026
TANG CAPITAL PARTNERS IV, INC
Signature:/s/ Kevin Tang
Name/Title:Chief Executive Officer
Date:04/01/2026
CONCENTRA BIOSCIENCES, LLC
Signature:/s/ Kevin Tang
Name/Title:Chief Executive Officer
Date:04/01/2026