Matthew L. Posard - 16 Sep 2026 Form 4 Insider Report for HALOZYME THERAPEUTICS, INC. (HALO)

Reporting relationship: Director
Issuer ticker: HALO
Reported as of: 16 Sep 2026
Net transaction value: -$2,046,581
SEC form: 4
Accepted by SEC: 17 Sep 2026, 17:19:45 UTC
Prior SEC filing: 22 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ James R. Oehler, Attorney-in-Fact

Key filing fact

Matthew L. Posard filed Form 4 for HALOZYME THERAPEUTICS, INC. (HALO) on 17 Sep 2026.

Key facts

This page summarizes Matthew L. Posard's Form 4 filing for HALOZYME THERAPEUTICS, INC. (HALO).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 17 Sep 2026, 17:19.

Change

Previous filing in this sequence was filed on 22 Jun 2026.
Current net transaction value: -$2,046,581.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001543792 Primary reporting owner

Posard Matthew L.

Relationship: Director
Address: C/O HALOZYME THERAPEUTICS, INC., 12390 EL CAMINO REAL, SAN DIEGO
Signature: /s/ James R. Oehler, Attorney-in-Fact
Signature date: 17 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

HALO transaction

Common Stock

Sale

Transaction value: $329,009
Shares: -3,100
Change %: -4%
Price: $106.13
Shares after: 74,735
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2

HALO transaction

Common Stock

Sale

Transaction value: $320,484
Shares: -3,000
Change %: -4%
Price: $106.83
Shares after: 71,735
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F3

HALO transaction

Common Stock

Sale

Transaction value: $961,124
Shares: -8,896
Change %: -12%
Price: $108.04
Shares after: 62,839
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F4

HALO transaction

Common Stock

Sale

Transaction value: $435,964
Shares: -4,000
Change %: -6.4%
Price: $108.99
Shares after: 58,839
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

The sales reported on this Form 4 were made pursuant to a written trading plan adopted by the Reporting Person on June 15, 2026 in accordance with Rule 10b5-1.

Footnote F2

Represents a weighted average sales price per share. The shares were sold at prices ranging from $105.550 to $106.540. 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.

Footnote F3

Represents a weighted average sales price per share. The shares were sold at prices ranging from $106.580 to $107.310. 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.

Footnote F4

Represents a weighted average sales price per share. The shares were sold at prices ranging from $107.600 to $108.450. 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.

Footnote F5

Represents a weighted average sales price per share. The shares were sold at prices ranging from $108.605 to $109.460. 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.