Filing Details

Item 1(a)

Name of Issuer:

Halozyme Therapeutics Inc

Item 1(b)

Address of Issuer's Principal Executive Offices:

11388 Sorrento Valley Road, San Diego, CA 92121

Item 2(a)

Name of Person Filing:

Artisan Partners Limited Partnership ("APLP")

Artisan Investments GP LLC ("Artisan Investments")

Artisan Partners Holdings LP ("Artisan Holdings")

Artisan Partners Asset Management Inc. ("APAM")

Item 2(b)

Address of Principal Business Office:

APLP, Artisan Investments, Artisan Holdings, and APAM are all located at:

875 East Wisconsin Avenue, Suite 800

Milwaukee, WI 53202

Item 2(c)

Citizenship:

APLP is a Delaware limited partnership

Artisan Investments is a Delaware limited liability company

Artisan Holdings is a Delaware limited partnership

APAM is a Delaware corporation

Item 2(d)

Title of Class of Securities:

Common Stock

Item 2(e)

CUSIP Number:

40637H109

Item 3

Type of Person:

(e) APLP is an investment adviser registered under section 203 of the

Investment Advisers Act of 1940.

(g) Artisan Holdings is the sole limited partner of APLP and the sole member of

Artisan Investments; Artisan Investments is the general partner of APLP;

APAM is the general partner of Artisan Holdings.

Item 4

Ownership (at 3/31/2020):

(a)

Amount owned "beneficially" within the meaning of rule 13d-3:

14,430,037

(b)

Percent of class:

10.5% (based on 138,069,410 shares outstanding as of 3/2/2020)

(c)

Number of shares as to which such person has:

(i)

sole power to vote or to direct the vote: None

(ii) shared power to vote or to direct the vote: 11,857,015

(iii) sole power to dispose or to direct the disposition of: None

(iv) shared power to dispose or to direct the disposition of:

14,430,037

Item 5

Ownership of Five Percent or Less of a Class:

Not Applicable

Item 6

Ownership of More than Five Percent on Behalf of Another Person:

The shares reported herein have been acquired on behalf of discretionary clients

of APLP. Persons other than APLP are entitled to receive all dividends from,

and proceeds from the sale of, those shares. None of those persons, to the

knowledge of APLP, Artisan Holdings, APAM, or Artisan Investments has an

economic interest in more than 5% of the class.

Item 7

Identification and Classification of the Subsidiary Which Acquired the Security Being

Reported on by the Parent Holding Company or Control Person:

Not Applicable

Item 8

Identification and Classification of Members of the Group:

Not Applicable

Item 9

Notice of Dissolution of Group:

Not Applicable

Item 10

Certification:

By signing below I certify that, to the best of my knowledge and belief, the

securities referred to above were acquired and are held in the ordinary course of

business and were not acquired and are not held for the purpose of or with the

Exhibit Index

Exhibit 1

Joint Filing Agreement dated 4/9/2020 by and among Artisan Partners Limited

Partnership, Artisan Investments GP LLC, Artisan Partners Holdings LP, and

Artisan Partners Asset Management Inc.