# EDGAR Filing Document

**Accession Number:** 0000791908
**File Stem:** 0001214659-23-000341
**Filing Date:** 2023-1
**Character Count:** 9510
**Document Hash:** e74776a73eb4e543c133a80a764d7bdb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001214659-23-000341.hdr.sgml**: 20230106

**ACCESSION NUMBER**: 0001214659-23-000341

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230103

**FILED AS OF DATE**: 20230106

**DATE AS OF CHANGE**: 20230106

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Sitko Bradley
- **CENTRAL INDEX KEY:** 0001959809

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39801
- **FILM NUMBER:** 23515440

**MAIL ADDRESS:**
- **STREET 1:** C/O XOMA CORPORATION
- **STREET 2:** 2200 POWELL STREET, SUITE 310
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** XOMA Corp
- **CENTRAL INDEX KEY:** 0000791908
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 522154066
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2200 POWELL STREET
- **STREET 2:** SUITE 310
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608
- **BUSINESS PHONE:** 510-204-7239

**MAIL ADDRESS:**
- **STREET 1:** 2200 POWELL STREET
- **STREET 2:** SUITE 310
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** XOMA LTD /DE/
- **DATE OF NAME CHANGE:** 19990107

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** XOMA CORP /DE/
- **DATE OF NAME CHANGE:** 19920703

## Ex-24

```
<pre>
      LIMITED POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Thomas Burns, Christine Theriault, and Christopher Baldwin,  signing
individually, as the undersigned's true and lawful attorneys-in-fact to:
(1)	Prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary or appropriate
to obtain codes and passwords enabling the undersigned to make electronic
filings with the SEC of reports required by Section 16(a) of the Securities
Exchange Act of 1934 (the "Exchange Act")  or any rule or regulation of the SEC;
(2)	Execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer, director and/or stockholder of XOMA Corporation (the "Company"),
Forms 3, 4, and 5 and amendments thereto in accordance with Section 16(a) of the
Exchange Act and the rules thereunder;
(2)	Do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4, or 5
or amendment thereto and timely file such form with the SEC and any stock
exchange or similar authority; and
(3)	Take any other action of any type whatsoever which, in the opinion of any
such attorney-in-fact, may be necessary or desirable in connection with the
foregoing authority, it being understood that the documents executed by and such
attorney-in-fact on behalf of the undersigned pursuant to this Limited Power of
Attorney shall be in such form and shall contain such terms and conditions as
such attorney-in-fact may approve in such attorney-in-fact's discretion.
The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever required,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Limited Power of Attorney and the rights and powers
herein granted.  The undersigned acknowledges that each of the foregoing
attorney-in-facts, in serving in such capacity at the request of the
undersigned, is not assuming, nor is any Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.
This Limited Power of Attorney shall remain in full force and effect until the
earlier to occur of (a) undersigned is no longer required to file Forms 3, 4,
and 5 with respect to any securities issued by the Company, (b) revocation by
the undersigned in a signed writing delivered to the foregoing attorney-in-fact
and (c) as to any attorney-in-fact individually, until such attorney-in-fact is
no longer employed by the Company.  This Limited Power of Attorney may be filed
with the SEC as a confirming statement of the authority granted herein.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of December 22, 2022.

/s/ Bradley Sitko
    </pre>
```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Sitko Bradley<br><sub>(Last) (First) (Middle)</sub><br>C/O XOMA CORPORATION<br>2200 POWELL STREET, SUITE 310<br><sub>(Street)</sub><br>EMERYVILLE, CA 94608<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-01-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Investment Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>XOMA Corp [ XOMA ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Employee Stock Option (right to buy) | $18.66 | 2023-01-03 |  | A |  | 300000 |  | <sup>(1)</sup> | 2033-01-03 | Common Stock | 300000 | $0 | 300000 | D |  |
| Employee Stock Option (right to buy) | $30.00 | 2023-01-03 |  | A |  | 250000 |  | <sup>(1)</sup> | 2033-01-03 | Common Stock | 250000 | $0 | 250000 | D |  |

---

### Footnotes:

(1) Shares subject to this option shall vest over four years with a 25% vest on the one-year anniversary of vesting commencement date, and the remaining shares vest monthly over the following 36 months.

**Signature:** /s/ Thomas Burns, Attorney-in-Fact for Bradley Sitko  
**Date:** 2023-01-06

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**