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HALO in the 13F filings

Halozyme Therapeutics Inc · CUSIP 40637H109

Sector · Pharmaceuticals and biotechnologyTheme · Biological productsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Mar 2025
the date the book describes
Filed
15 May 2025
latest of these filings; the earliest 12 May 2025
Managers listing it
9
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 6 listed it in both
Shares listed
8,442,714
combined, among listed positions
Reported value
$539m
combined, at the quarter end

Among the 95 comparable managers: 7 buyers (opened or added shares) and 1 seller (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing HALO in Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

9 of 9 holders

ActionFiling
AllianceBernstein LP3,215,109$205m0.07%Added+146,67715 May 2025 (the filing on sec.gov)
Artisan Partners LP1,138,651$73m0.12%Trimmed-234,43814 May 2025 (the filing on sec.gov)
Arrowstreet Capital LP1,115,507$71m0.06%Added+122,62014 May 2025 (the filing on sec.gov)
Capital World Investors748,230$48munder 0.1%Held012 May 2025 (the filing on sec.gov)
Janus Henderson Group Ltd714,727$46munder 0.1%Added+12,64215 May 2025 (the filing on sec.gov)
Two Sigma Investments LP646,028$41m0.09%Addedn.a.15 May 2025 (the filing on sec.gov)
Marshall Wace LLP463,608$30munder 0.1%Addedn.a.15 May 2025 (the filing on sec.gov)
Two Sigma Advisers LP293,729$19munder 0.1%Addedn.a.15 May 2025 (the filing on sec.gov)
PDT Partners LLC107,125$6.8m0.49%Added+23,06315 May 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2024 to Q1 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (0)

No new position among listed positions.

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 11 in Q2 2026

Tracked managers listing it, at least.

0510152014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
HALO by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20131$19mn.a.n.a.
Q1 20141$18mn.a.n.a.
Q2 20141$28mn.a.n.a.
Q3 20141$33mn.a.n.a.
Q4 20143$46mn.a.n.a.
Q1 20152$123mn.a.n.a.
Q2 20152$218mn.a.n.a.
Q3 20152$96mn.a.n.a.
Q4 20152$75mn.a.n.a.
Q1 20161$63mn.a.n.a.
Q2 20161$61mn.a.n.a.
Q3 20162$90mn.a.n.a.
Q4 20163$77mn.a.n.a.
Q1 20173$110mn.a.n.a.
Q2 20173$109mn.a.n.a.
Q3 20173$150mn.a.n.a.
Q4 20175$169mn.a.n.a.
Q1 20187$159mn.a.n.a.
Q2 20184$87mn.a.n.a.
Q3 20184$105mn.a.n.a.
Q4 20185$86mn.a.n.a.
Q1 20196$86mn.a.n.a.
Q2 20197$98mn.a.n.a.
Q3 20195$79mn.a.n.a.
Q4 20198$177mn.a.n.a.
Q1 20209$378mn.a.n.a.
Q2 20208$619mn.a.n.a.
Q3 20208$540mn.a.n.a.
Q4 20209$752mn.a.n.a.
Q1 20217$712mn.a.n.a.
Q2 20217$769mn.a.n.a.
Q3 20217$648mn.a.n.a.
Q4 20218$635mn.a.n.a.
Q1 20227$611mn.a.n.a.
Q2 202210$634mn.a.n.a.
Q3 20228$537mn.a.n.a.
Q4 20229$886mn.a.n.a.
Q1 20236$339mn.a.n.a.
Q2 20236$394mn.a.n.a.
Q3 20233$527mn.a.n.a.
Q4 20236$407m42
Q1 20245$326m33
Q2 20245$384m24
Q3 20245$409m22
Q4 20248$335m53
Q1 20259$539m71
Q2 202510$422m64
Q3 202514$1.1bn104
Q4 202513$885m1323
Q1 202611$710m1515
Q2 202611$732m1716

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

HALO and GILD →HALO and AMGN →HALO and ARGX →Choose a stock to compare with HALO →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own HALO, latest filings →Back to the 13F Explorer →