Across its top 20 institutional holders, HALO's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 4/100, avg. turnover score 27/100).

Quarterly Activity

Recent Activity

+$4.5B

Total Buy Value

$3.8B

Total Sell Value

New buy83

Trim212

Add237

Sold out68

320

Net Buyers

280

Net Sellers

Smart Money Convergence

HALO does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

Filings (90d)

$548K

Total Est. Value

7K shares

Planned Shares

Last Filed 2026-06-29

Filer	Title/Relationship	Filing Date	Planned Shares	Est. Value
Krishnan Mahesh	Director	2026-06-29	7K shares	$548K

Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

Filings (14d)

Data as of 2026-07-02

2026-07-02

Halozyme Therapeutics announced on June 30, 2026, that its Chief Operating Officer, Cortney Caudill, is leaving the company. The announcement also mentioned an update to the senior management structure. The company thanked Ms. Caudill for her contributions.

View Full Filing (SEC EDGAR)

View all Form 8-K filings

CUSIP

40637H109

FAQ

Who are the top institutional investors holding HALOZYME THERAPEUTICS INC (HALO)?

Major stakeholders currently include BlackRock, Inc. ($857.3M), Vanguard Capital Management LLC ($340.7M), Vanguard Portfolio Management LLC ($339.3M). Based on the latest 13F filings, there are a total of 630 tracked investment funds and institutions maintaining positions in HALO.

What is the overall institutional sentiment toward HALO recently?

Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $485.1M, driven by 320 managers accumulating shares while 280 reduced their exposure.

Which institutions have been selling or reducing their HALO positions?

In the latest period, 212 funds trimmed their holdings, and 68 managers completely exited their positions. The aggregate reported sell value was $3.8B.

Are there any notable investors adding HALO to their portfolios?

Yes, buying activity remains notable. 83 institutions opened new positions in {ticker}, and 237 existing holders added to their shares. The total reported buy value for the quarter amounted to $4.5B.