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Halozyme Therapeutics, Inc. (HALO) institutional ownership

Market cap$7.3B SectorHealthcare
Funds holding · Q1 2026
598
reported HALO position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
324 buyers · 274 sellers

Halozyme Therapeutics, Inc. (HALO) price and institutional activity

Dates

Q1 2026

$0 bought by 324 investors
Boston PartnersTwo Sigma Investments, LP +322 more
$0 sold by 274 investors
NorgesArrowstreet Capital, Limited Partnership +272 more
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Bought Sold Totals per quarter; hover a bar for the names.

Halozyme Therapeutics, Inc. (HALO) institutional activity · 598

Investor Type Est. change Change Δ Own Date
Boston Partners · Added
Change +2.2M Date Q1 2026
Boston Partners Added· Q1 2026 +2.2M Q1 2026
Norges · Exited
Change −1.9M Δ Own −100.0% Date Q1 2026
Norges Exited· Q1 2026 −1.9M −100.0% Q1 2026
Arrowstreet Capital, Limited Partnership · Reduced
Change −1.3M Date Q1 2026
Arrowstreet Capital, Limited Partnership Reduced· Q1 2026 −1.3M Q1 2026
Millennium Management LLC · Reduced
Change −993K Date Q1 2026
Millennium Management LLC Reduced· Q1 2026 −993K Q1 2026
Pacer Advisors, Inc. · Exited
Change −937K Δ Own −100.0% Date Q1 2026
Pacer Advisors, Inc. Exited· Q1 2026 −937K −100.0% Q1 2026
Two Sigma Investments, LP · Added
Change +868K Δ Own +120.9% Date Q1 2026
Two Sigma Investments, LP Added· Q1 2026 +868K +120.9% Q1 2026
William Blair Investment Management, LLC · Added
Change +683K Date Q1 2026
William Blair Investment Management, LLC Added· Q1 2026 +683K Q1 2026
Jane Street Group, LLC · Added
Change +667K Date Q1 2026
Jane Street Group, LLC Added· Q1 2026 +667K Q1 2026
Epoch Investment Partners, Inc. · Added
Change +605K Date Q1 2026
Epoch Investment Partners, Inc. Added· Q1 2026 +605K Q1 2026
First Trust Advisors LP · Added
Change +471K Date Q1 2026
First Trust Advisors LP Added· Q1 2026 +471K Q1 2026
Natixis · Reduced
Change −466K Date Q1 2026
Natixis Reduced· Q1 2026 −466K Q1 2026
UBS Group AG · Reduced
Change −452K Date Q1 2026
UBS Group AG Reduced· Q1 2026 −452K Q1 2026
Federated Hermes, Inc. · Reduced
Change −451K Date Q1 2026
Federated Hermes, Inc. Reduced· Q1 2026 −451K Q1 2026
Voloridge Investment Management, LLC · Reduced
Change −444K Date Q1 2026
Voloridge Investment Management, LLC Reduced· Q1 2026 −444K Q1 2026
Qube Research & Technologies Ltd · Exited
Change −412K Δ Own −100.0% Date Q1 2026
Qube Research & Technologies Ltd Exited· Q1 2026 −412K −100.0% Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 598

Famous investor activity in Halozyme Therapeutics, Inc. (HALO)

Halozyme Therapeutics, Inc. (HALO) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Torley Helen · Director 2 operations −$153K
Price $79.28–$80.19 Qty −2K Owned 768K ΔOwn −0.2% Trade date Jul 8, 2026 Filed date Jul 9, 2026
Torley Helen Director 2 operations $79.28–$80.19 −2K −$153K 768K −0.2% Jul 8, 2026 Jul 9, 2026
Torley Helen · Director 2 operations $0
Price $12.07 Qty 0 Owned 0 Trade date Jul 8, 2026 Filed date Jul 9, 2026
Torley Helen Director 2 operations $12.07 0 $0 0 Jul 8, 2026 Jul 9, 2026
Ramsay David A. · Officer 2 operations 56K
Owned 40K Trade date Jul 1, 2026 Filed date Jul 2, 2026
Ramsay David A. Officer 2 operations 56K 40K Jul 1, 2026 Jul 2, 2026
Snellgrove Darren · Officer 2 operations 169K
Owned 127K Trade date Jul 1, 2026 Filed date Jul 2, 2026
Snellgrove Darren Officer 2 operations 169K 127K Jul 1, 2026 Jul 2, 2026
Connaughton Bernadette · Director 2 operations −$125K
Price $76.39–$77.21 Qty −2K Owned 42K ΔOwn −3.7% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Connaughton Bernadette Director 2 operations $76.39–$77.21 −2K −$125K 42K −3.7% Jul 1, 2026 Jul 2, 2026
Ramsay David A. · Officer 2 operations 0
Owned 0 Trade date Jun 30, 2026 Filed date Jul 2, 2026
Ramsay David A. Officer 2 operations 0 0 Jun 30, 2026 Jul 2, 2026
Ramsay David A. · Officer Tax withholding or exercise payment (F) -$423K
Price $78.27 Qty -5K Owned 5K ΔOwn −54.1% Trade date Jun 30, 2026 Filed date Jul 2, 2026
Ramsay David A. Officer Tax withholding or exercise payment (F) $78.27 -5K -$423K 5K −54.1% Jun 30, 2026 Jul 2, 2026
Krishnan Mahesh · Director Sell −$548K
Price $75.00 Qty −7K Owned 14K ΔOwn −33.6% Trade date Jun 29, 2026 Filed date Jun 30, 2026
Krishnan Mahesh Director Sell $75.00 −7K −$548K 14K −33.6% Jun 29, 2026 Jun 30, 2026
Krishnan Mahesh · Director 2 operations 0
Price $38.46 Owned 2K Trade date Jun 29, 2026 Filed date Jun 30, 2026
Krishnan Mahesh Director 2 operations $38.46 0 2K Jun 29, 2026 Jun 30, 2026
Snyder Mark Howard · Officer 2 operations 0
Owned 10K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Snyder Mark Howard Officer 2 operations 0 10K Jun 12, 2026 Jun 15, 2026
Snyder Mark Howard · Officer Tax withholding or exercise payment (F) -$189K
Price $69.50 Qty -3K Owned 50K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Snyder Mark Howard Officer Tax withholding or exercise payment (F) $69.50 -3K -$189K 50K Jun 12, 2026 Jun 15, 2026
Torley Helen · Director 4 operations −$691K
Price $66.37–$69.69 Qty −10K Owned 768K Trade date Jun 3, 2026 Filed date Jun 3, 2026
Torley Helen Director 4 operations $66.37–$69.69 −10K −$691K 768K Jun 3, 2026 Jun 3, 2026
Torley Helen · Director 2 operations $0
Price $12.07 Qty 0 Owned 2K Trade date Jun 3, 2026 Filed date Jun 3, 2026
Torley Helen Director 2 operations $12.07 0 $0 2K Jun 3, 2026 Jun 3, 2026
Torley Helen · Director 2 operations −$1.3M
Price $66.31–$66.75 Qty −20K Owned 768K Trade date Jun 2, 2026 Filed date Jun 3, 2026
Torley Helen Director 2 operations $66.31–$66.75 −20K −$1.3M 768K Jun 2, 2026 Jun 3, 2026
Torley Helen · Director 2 operations $0
Price $12.07 Qty 0 Owned 12K Trade date Jun 2, 2026 Filed date Jun 3, 2026
Torley Helen Director 2 operations $12.07 0 $0 12K Jun 2, 2026 Jun 3, 2026
15 of 92
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Halozyme Therapeutics, Inc. (HALO) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 18.6M
% of shares outstanding 14.1% Filing date Jan 23, 2024
BlackRock Inc. 18.6M 14.1% Jan 23, 2024
Vanguard Group Inc 13.3M
% of shares outstanding 10.0% Filing date Feb 13, 2024
Vanguard Group Inc 13.3M 10.0% Feb 13, 2024
Vanguard Capital Management 6.2M
% of shares outstanding 5.2% Filing date Apr 30, 2026
Vanguard Capital Management 6.2M 5.2% Apr 30, 2026
State Street Corp 6.6M
% of shares outstanding 5.2% Filing date Oct 17, 2024
State Street Corp 6.6M 5.2% Oct 17, 2024
Artisan Partners Limited Partnership 3.1M
% of shares outstanding 2.5% Filing date Nov 12, 2024
Artisan Partners Limited Partnership 3.1M 2.5% Nov 12, 2024
Invesco Ltd. 2.8M
% of shares outstanding 2.1% Filing date Feb 1, 2024
Invesco Ltd. 2.8M 2.1% Feb 1, 2024
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Halozyme Therapeutics, Inc. (HALO) ownership FAQ

Who owns HALO?

598 reporting institutions disclosed HALO position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.