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Joel Greenblatt's Halozyme Therapeutics, Inc. (HALO) position

Yes: as of Q1 2026, Joel Greenblatt holds 747K shares of HALO worth an amount we cannot price (0.1% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
an amount we cannot price
Shares held
747K
% of portfolio
0.1%
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

HALO price vs Greenblatt's position

Dates
Average closing price · filing quarter
Price range · filing quarter

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +307K +69.8% 747K May 15, 2026
Q4 2025 Added +187K +73.8% 440K Feb 17, 2026
Q3 2025 Added +185K +271.7% 253K Nov 14, 2025
Q2 2025 Added +36K +109.2% 68K Aug 14, 2025
Q1 2025 Reduced −15K −31.4% 33K May 15, 2025
Q4 2024 Added +4K +9.7% 47K Feb 14, 2025
Q3 2024 Added +15K +52.5% 43K Nov 14, 2024
Q2 2024 Reduced −14K −32.3% 28K Aug 14, 2024
Q1 2024 Reduced −56K −57.2% 42K May 15, 2024
Q4 2023 Added +56K +132.5% 98K Feb 14, 2024
Q3 2023 Added +6K +17.1% 42K Nov 14, 2023
Q2 2023 Reduced −8K −18.0% 36K Aug 14, 2023
Q1 2023 Added +16K +59.8% 44K May 15, 2023
Q4 2022 Reduced −2K −7.2% 27K Feb 14, 2023
Q3 2022 Reduced −905 −3.0% 30K Nov 14, 2022
Q2 2022 Reduced −8K −21.6% 30K Aug 15, 2022
Q1 2022 Reduced −6K −13.8% 39K May 16, 2022
Q4 2021 Added +22K +92.6% 45K Feb 14, 2022
Q3 2021 Reduced −11K −31.8% 23K Nov 15, 2021
Q2 2021 Reduced −12K −25.8% 34K Aug 16, 2021
Q1 2021 First covered 46K May 17, 2021
Data through Q1 2026 · filed May 15, 2026
21 grouped rows from 21 quarters

More Greenblatt positions

Common questions

Does Joel Greenblatt own HALO?

Yes. As of Q1 2026, Joel Greenblatt disclosed 747K shares of HALO, worth an amount we cannot price. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Joel Greenblatt buy HALO?

Joel Greenblatt held HALO since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Joel Greenblatt sell HALO?

The quarter-by-quarter table above shows each sale and reduction Joel Greenblatt disclosed in HALO. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of HALO does Joel Greenblatt own?

Joel Greenblatt disclosed 747K shares of HALO as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Joel Greenblatt pay for HALO?

Joel Greenblatt began building the HALO position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.