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XNCR · Current Report (Form 8-K) · Filed March 4, 2026

Xencor Inc — Current Report (Form 8-K)

Form
8-K
Filed
March 4, 2026
Period
Mar 4, 2026
Ticker
XNCR
Accession
0001326732-26-000021
Boardroom Alpha · Filing insights

Alexion asserts no further US Ultomiris royalties; Xencor evaluating options, expects $100–$120M patent royalties through 2028; cash runway to mid-2028.

About Xencor Inc
Market cap
$831M
1Y TSR
+36.7%
3Y TSR
−23.1%
Board grade
C
Sector
Healthcare
CEO
Bassil I Dahiyat
Last annual meeting: Jun 16, 2026 · View full Xencor Inc profile →
xncr-20260304

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):  March 4, 2026
___________________________________________________
XENCOR, INC.
(Exact name of registrant as specified in its charter)
___________________________________________________
Delaware
001-3618220-1622502
(State or Other Jurisdiction of
Incorporation)
(Commission
File Number)
(IRS Employer
Identification Number)
465 North Halstead Street, Suite 200
Pasadena, California
91107
(Address of Principal Executive Offices)
(Zip Code)
(626) 305-5900
(Registrant’s telephone number, including area code)
(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:
o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o 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 ClassTrading Symbol(s)Name of Each Exchange on Which Registered
Common Stock, par value $0.01 per shareXNCRNasdaq Global 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 o
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. o



Item 7.01. Regulation FD Disclosure.

On March 2, 2026, Alexion Pharmaceuticals, Inc. (the “Licensee”) informed Xencor, Inc. (the “Company”) that it has taken the position that the Licensee does not owe any additional royalties for sales of Ultomiris® in the United States and that the Licensee does not intend to make any future payments under the parties’ Option and License Agreement (the “Agreement”) for sales in the United States. Licensee informed the Company that it intends to continue making royalty payments for sales of Ultomiris outside the United States.

The Company disagrees with the position taken by the Licensee and is actively evaluating its options.

On December 9, 2025, the Company announced the issuance of U.S. Patent 12,492,253 and its expectation to receive an estimated additional $100 to $120 million in aggregate through 2028 in low single-digit royalties on net sales of Ultomiris® in the United States from the Licensee pursuant to the Agreement.

Based on current operating plans, Xencor expects to end 2026 with between $380 million and $400 million in cash, cash equivalents and marketable debt securities, and to have sufficient cash resources to fund research and development programs and operations into mid-2028.

The Company does not undertake, and hereby disclaims, any duty to update the statements contained in this Current Report on Form 8-K except as required by law.

The information furnished under this Item 7.01 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.
Item 9.01. Financial Statements and Exhibits.
(d)Exhibits.
Exhibit No.Description
99.1
104Cover Page Interactive Data File, formatted in Inline Extensible Business Reporting Language (iXBRL).



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.
Date: March 4, 2026
XENCOR, INC.
By:/s/ Celia Eckert
Celia Eckert
General Counsel & Corporate Secretary

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Reference

Frequently asked questions

When did Xencor Inc file this 8-K?
Xencor Inc (XNCR) filed this Current Report (Form 8-K) with the SEC on March 4, 2026. The accession number assigned by EDGAR is 0001326732-26-000021.
What does an 8-K disclose?
Form 8-K is the SEC's current-report form, used to disclose material events between periodic reports (10-K / 10-Q). Triggers include CEO/CFO departures, acquisitions, bankruptcies, earnings releases, auditor changes, changes in fiscal year, and amendments to corporate governance. Each 8-K is keyed to one or more Item numbers (1.01 through 9.01).
What is the key takeaway from this filing?
Alexion asserts no further US Ultomiris royalties; Xencor evaluating options, expects $100–$120M patent royalties through 2028; cash runway to mid-2028. This is Boardroom Alpha's one-line summary of the current report; see the full filing text above for the formal disclosure.
What Item codes does an 8-K cover?
An 8-K's Item codes (1.01 through 9.01) specify what kind of event is being disclosed — e.g. Item 1.01 for entering a material agreement, Item 5.02 for departure/election of directors and executive officers, Item 8.01 for other events. The Item codes for this 8-K appear in the filing text above.
Where can I find Xencor Inc's prior current reports on EDGAR?
The SEC EDGAR browser lists every 8-K Xencor Inc has filed under CIK 1326732, sortable by date. Use the "View on SEC EDGAR" link in the page header, or browse directly via https://www.sec.gov/cgi-bin/browse-edgar.
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