SECURITIES AND EXCHANGE
COMMISSION

Washington, DC 20549

SCHEDULE 13D/A

(Amendment No. 10)

Under the Securities Exchange Act of 1934

Xencor, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

98401F 105

(CUSIP Number)

John S. Stafford III

350 N. Orleans Street, Suite 2N

Chicago, IL 60654

312-244-5000

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

June 1, 2020

(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. o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

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).

(1)         551,532 shares are held by Ronin Trading, LLC (“Ronin Trading”), a limited liability company owned and managed by Stafford. 2,357,649 shares are held in a Class C Capital Account of John S. Stafford, III at Ronin Capital, LLC (“Ronin Capital”), a limited liability company owned and managed by Mr. Stafford. Mr. Stafford is the indirect beneficial owner of all of the shares of common stock of the Issuer held of record by Ronin Capital and Ronin Trading.

(2)         This percentage is calculated based upon the 57,004,786 shares of the Issuer’s Common Stock reported to be outstanding as of April 29, 2020 in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020.

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(1)         The shares are held in a Class C Capital Account of John S. Stafford, III at Ronin Capital. Mr. Stafford is the indirect beneficial owner of all of the shares of common stock of the Issuer held of record by Ronin Capital.

(2)         This percentage is calculated based upon the 57,004,786 shares of the Issuer’s Common Stock reported to be outstanding as of April 29, 2020 in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020.

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(1)         The shares are held by Ronin Trading.  Mr. Stafford is the indirect beneficial owner of all of the shares of common stock of the Issuer held of record by Ronin Trading.

(2)         This percentage is calculated based upon the 57,004,786 shares of the Issuer’s Common Stock reported to be outstanding as of April 29, 2020 in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020.

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Item 5(a) of the Schedule 13D is amended and supplemented as follows:

All of the percentages of beneficial ownership  of the Reporting Persons set forth in this Schedule 13D are based on 57,004,786 shares of the Issuer’s Common Stock reported to be outstanding as of April 29, 2020 in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020.

As of June 2, 2020, John S. Stafford III beneficially owns 2,909,181 shares of the Common Stock of the Issuer, representing approximately 5.1% of the Issuer’s outstanding shares of Common Stock.  Mr. Stafford is the indirect beneficial owner of all 2,357,649 shares of Common Stock beneficially owned by Ronin Capital, LLC, representing approximately 4.1% of the Issuer’s outstanding shares of Common Stock.  Mr. Stafford, as the manager of Ronin Trading, LLC, also may be deemed to beneficially own the 551,532 shares of Common Stock beneficially owned by Ronin Trading, LLC, representing approximately 1.0% of the outstanding shares of Common Stock.

Subsequent to the filing of Amendment No. 9 to the Schedule 13D, the Reporting Persons engaged in the following transactions with respect to the Issuer’s securities within the last sixty days prior to the filing of this Amendment:

Ronin Capital, LLC

·                                          On May 20, 2020,  Ronin Capital, LLC sold  172,516 shares at an average price of $31.995 per share.

·                                          On May 21, 2020,  Ronin Capital, LLC sold  35,127 shares at an average price of $31.5333 per share.

·                                          On May 22, 2020,  Ronin Capital, LLC sold 32,927 shares at an average price of $31.3784 per share.

·                                          On May 26, 2020,  Ronin Capital, LLC sold 138,077 shares at a price of $32.2247 per share.

·                                          On May 27, 2020,  Ronin Capital, LLC sold  72,305 shares at an average price of $32.1256 per share.

·                                          On May 28, 2020,  Ronin Capital, LLC sold  21,418 shares at an average price of $31.7781 per share.

·                                          On May 29, 2020,  Ronin Capital, LLC sold 8,935 shares at a price of $30.1960 per share.

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·                                          On June 1, 2020,  Ronin Capital, LLC sold  51,969 shares at an average price of $30.7453 per share.

·                                          On June 2, 2020,  Ronin Capital, LLC sold  74,276 shares at an average price of $30.8985 per share.

Except as expressly modified hereby, all provisions of the Schedule 13D shall continue in full force and effect.

SIGNATURE

After reasonable inquiry and to the best of their knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Date:  June 3, 2020

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