[Form 4] HALOZYME THERAPEUTICS, INC. Insider Trading Activity

Rhea-AI Filing Summary

HALOZYME THERAPEUTICS, INC. President and CEO Helen Torley reported a combination of option exercises and share sales. Over March 2–4, 2026, she exercised options to acquire 50,000 shares of common stock at an exercise price of $12.07 per share.

She then sold 50,000 shares of common stock in multiple open‑market transactions under a pre‑established Rule 10b5‑1 trading plan, at weighted average prices within ranges between $68.22 and $71.36 per share. After these transactions, she directly owned 767,780 common shares.

Insider Trade Summary

Net Seller: 50,000 shares ($3,476,157)

Net Sell 13 txns

Insider Torley Helen

Role PRESIDENT AND CEO

Sold 50,000 shs ($3.48M)

Type	Security	Shares	Price	Value
Exercise	Option to Purchase Common Stock	10,000	$12.07	$121K
Exercise	Common Stock	10,000	$12.07	$121K
Sale	Common Stock	7,329	$69.944	$513K
Sale	Common Stock	2,671	$70.945	$189K
Exercise	Option to Purchase Common Stock	20,000	$12.07	$241K
Exercise	Common Stock	20,000	$12.07	$241K
Sale	Common Stock	13,481	$68.85	$928K
Sale	Common Stock	6,519	$69.333	$452K
Exercise	Option to Purchase Common Stock	20,000	$12.07	$241K
Exercise	Common Stock	20,000	$12.07	$241K
Sale	Common Stock	4,100	$69.197	$284K
Sale	Common Stock	15,322	$69.799	$1.07M
Sale	Common Stock	578	$70.461	$41K

Holdings After Transaction: Option to Purchase Common Stock — 151,923 shares (Direct); Common Stock — 777,780 shares (Direct)

Footnotes (1)

1. The options exercised and sales reported on this Form 4 were made pursuant to a written trading plan adopted by the Reporting Person on March 21, 2025 in accordance with Rule 10b5-1. The sales of common shares reported on this Form 4 represent shares that were acquired following exercise of stock options with a ten-year term expiring in February 2027. Represents a weighted average sales price per share. The shares were sold at prices ranging from $68.375 to $69.370. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Represents a weighted average sales price per share. The shares were sold at prices ranging from $69.380 to $70.340. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Represents a weighted average sales price per share. The shares were sold at prices ranging from $70.380 to $70.620. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Represents a weighted average sales price per share. The shares were sold at prices ranging from $68.220 to $69.210. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Represents a weighted average sales price per share. The shares were sold at prices ranging from $69.220 to $69.520. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Represents a weighted average sales price per share. The shares were sold at prices ranging from $69.400 to $70.390. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Represents a weighted average sales price per share. The shares were sold at prices ranging from $70.400 to $71.360. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Grant to Reporting Person of options, exercisable over a 4-year period measured from the date of grant, 25% after 12 months, then 1/48th of the Option Shares per month thereafter. The date of grant was February 22, 2017.

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^*

Torley Helen

(Last) (First) (Middle)

C/O HALOZYME THERAPEUTICS, INC.

12390 EL CAMINO REAL

(Street)

SAN DIEGO CA 92130

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
HALOZYME THERAPEUTICS, INC. [ HALO ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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

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

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

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	03/02/2026		M(1)		20,000	A	$12.07	787,780	D
Common Stock	03/02/2026		S(1)		4,100	D	$69.197(2)	783,680	D
Common Stock	03/02/2026		S(1)		15,322	D	$69.799(3)	768,358	D
Common Stock	03/02/2026		S(1)		578	D	$70.461(4)	767,780	D
Common Stock	03/03/2026		M(1)		20,000	A	$12.07	787,780	D
Common Stock	03/03/2026		S(1)		13,481	D	$68.85(5)	774,299	D
Common Stock	03/03/2026		S(1)		6,519	D	$69.333(6)	767,780	D
Common Stock	03/04/2026		M(1)		10,000	A	$12.07	777,780	D
Common Stock	03/04/2026		S(1)		7,329	D	$69.944(7)	770,451	D
Common Stock	03/04/2026		S(1)		2,671	D	$70.945(8)	767,780	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
Option to Purchase Common Stock	$12.07	03/02/2026		M(1)			20,000	(9)	02/22/2027	Common Stock	20,000	$12.07	181,923	D
Option to Purchase Common Stock	$12.07	03/03/2026		M(1)			20,000	(9)	02/22/2027	Common Stock	20,000	$12.07	161,923	D
Option to Purchase Common Stock	$12.07	03/04/2026		M(1)			10,000	(9)	02/22/2027	Common Stock	10,000	$12.07	151,923	D

Explanation of Responses:

1. The options exercised and sales reported on this Form 4 were made pursuant to a written trading plan adopted by the Reporting Person on March 21, 2025 in accordance with Rule 10b5-1. The sales of common shares reported on this Form 4 represent shares that were acquired following exercise of stock options with a ten-year term expiring in February 2027.

2. Represents a weighted average sales price per share. The shares were sold at prices ranging from $68.375 to $69.370. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

3. Represents a weighted average sales price per share. The shares were sold at prices ranging from $69.380 to $70.340. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

4. Represents a weighted average sales price per share. The shares were sold at prices ranging from $70.380 to $70.620. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

5. Represents a weighted average sales price per share. The shares were sold at prices ranging from $68.220 to $69.210. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

6. Represents a weighted average sales price per share. The shares were sold at prices ranging from $69.220 to $69.520. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

7. Represents a weighted average sales price per share. The shares were sold at prices ranging from $69.400 to $70.390. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

8. Represents a weighted average sales price per share. The shares were sold at prices ranging from $70.400 to $71.360. The Reporting Person has provided to the issuer, and will provide to any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

9. Grant to Reporting Person of options, exercisable over a 4-year period measured from the date of grant, 25% after 12 months, then 1/48th of the Option Shares per month thereafter. The date of grant was February 22, 2017.

Remarks:

	/s/ James R. Oehler, Attorney-in-Fact	03/04/2026
	** Signature of Reporting Person	Date
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