Planned share sale by Xencor (XNCR) director under Rule 10b5-1 plan

Rhea-AI Filing Summary

Xencor Inc director Alan Bruce Montgomery reported an open-market sale of Xencor common stock. On June 15, 2026, he sold 5,064 shares of Common Stock at $12.31 per share. After this transaction, he directly owned 15,547 shares of Xencor common stock.

The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on March 4, 2026, indicating the timing of the trade was set in advance rather than decided spontaneously.

Insider Trade Summary 10b5-1

Net Seller: 5,064 shares ($62,338)

Net Sell 1 txn

Insider Montgomery Alan Bruce

Role null

Sold 5,064 shs ($62K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,064	$12.31	$62K

Holdings After Transaction: Common Stock — 15,547 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 5,064 shares Sale price: $12.31 per share Shares held after sale: 15,547 shares +1 more

4 metrics

Shares sold 5,064 shares Open-market sale on June 15, 2026

Sale price $12.31 per share Price for Common Stock sold on June 15, 2026

Shares held after sale 15,547 shares Director’s direct ownership following the transaction

Net shares sold 5,064 shares Net sell direction in transaction summary

Key Terms

Common Stock, open-market sale, Rule 10b5-1 plan

3 terms

Common Stock financial

"Security title for the reported transaction is listed as Common Stock."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open-market sale financial

"The transaction action is described as an open-market sale of shares."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Rule 10b5-1 plan regulatory

"Footnote states the sale was pursuant to a Rule 10b5-1 plan."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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^*

Montgomery Alan Bruce

(Last) (First) (Middle)

C/O XENCOR, INC.

465 N HALSTEAD STREET, SUITE 200

(Street)

PASADENA CALIFORNIA 91107

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Xencor Inc [ XNCR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/15/2026		S(1)		5,064	D	$12.31	15,547	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction is pursuant to a 10b5-1 plan adopted by the Reporting Person on March 4, 2026.

Remarks:

	/s/ Celia E. Eckert, Attorney-in-Fact	06/17/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Xencor (XNCR) disclose in this Form 4?

Xencor disclosed that director Alan Bruce Montgomery sold 5,064 shares of Common Stock in an open-market transaction at $12.31 per share. After the sale, he directly held 15,547 Xencor shares, according to the reported post-transaction ownership figure.

Was the Xencor (XNCR) insider sale made under a 10b5-1 trading plan?

Yes. The filing notes the transaction was made under a Rule 10b5-1 plan adopted on March 4, 2026. Such plans pre-schedule trades, meaning the timing of this sale was set in advance rather than chosen in reaction to near-term market developments.

How many Xencor (XNCR) shares did the director sell and at what price?

The director sold 5,064 shares of Xencor Common Stock at a price of $12.31 per share. This was reported as an open-market sale, with the total number of shares sold and price per share specified in the transaction details.

How many Xencor (XNCR) shares does the insider hold after this transaction?

Following the reported sale, the director’s direct ownership stands at 15,547 shares of Xencor Common Stock. This post-transaction holding figure comes from the Form 4 and reflects only the shares reported in this filing.

Does the Xencor (XNCR) Form 4 show any option exercises or derivative transactions?

No. The filing shows only a single non-derivative transaction: an open-market sale of Common Stock. The derivative transaction summary is empty, indicating no options, warrants, or other derivative securities were exercised or traded in this particular report.