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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 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 13 listed it in both
Shares listed
18,204,184
combined, among listed positions
Reported value
$1.2bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 15 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -883,539.

Managers listing HALO in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Invesco Ltd4,012,494$259munder 0.1%Added+364,43112 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,918,149$124m0.07%Trimmed-1,304,35814 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,868,708$121m0.07%Added+219,24215 May 2026 (the filing on sec.gov)
AllianceBernstein LP1,736,501$117munder 0.1%Trimmed-98,98515 May 2026 (the filing on sec.gov)
Two Sigma Investments LP1,584,961$102m0.08%Added+867,59215 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd1,233,658$80munder 0.1%Added+369,70218 May 2026 (the filing on sec.gov)
AQR Capital Management LLC1,016,429$65munder 0.1%Trimmed-141,93015 May 2026 (the filing on sec.gov)
Capital World Investors871,902$56munder 0.1%Trimmed-7,97213 May 2026 (the filing on sec.gov)
Jane Street Group LLC831,707$54munder 0.1%Added+667,36312 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC731,811$47m0.07%Added+169,10014 May 2026 (the filing on sec.gov)
Bridgewater Associates LP511,429$33m0.15%Trimmed-50,14815 May 2026 (the filing on sec.gov)
Millennium Management LLC471,284$30munder 0.1%Trimmed-992,66415 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC310,515$20m0.08%Trimmed-443,99915 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc259,390$17munder 0.1%Added+17,35215 May 2026 (the filing on sec.gov)
Citadel Advisors LLC191,051$12munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Man Group PLC141,488$9.1munder 0.1%Added+69,87615 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP130,000$8.4munder 0.1%Added+5,00013 May 2026 (the filing on sec.gov)
Marshall Wace LLP121,006$7.8munder 0.1%Trimmed-376,19415 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC62,292$4.0munder 0.1%Trimmed-351,22915 May 2026 (the filing on sec.gov)
Walleye Capital LLC53,364$3.4munder 0.1%Added+8,69613 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP44,486$2.9munder 0.1%Trimmed-17,22015 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC27,413$1.8munder 0.1%Added+47727 Oct 2026 (the filing on sec.gov)
Fidelity (FMR LLC)21,707$1.4munder 0.1%Added+52415 May 2026 (the filing on sec.gov)
Freestone Grove Partners LP20,719$1.3munder 0.1%Added+5,18315 May 2026 (the filing on sec.gov)
Wellington Management Group LLP10,288$665kunder 0.1%Trimmed-26,95315 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, 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 (2)

Exited (2)

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 →