Portolan Capital Management’s Halozyme HALO Stock Holding History

Portolan Capital Management’s Portfolio HALO Stock Details HALO Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$9.98M	Buy	+127,498	New	+$8.69M	0.37%	82
2021 Q2	–	Sell	-146,239	Closed	-$6.1M	–	141
2021 Q1	$6.1M	Sell	146,239 -62,661	-30%	-$2.86M	0.48%	93
2020 Q4	$8.92M	Sell	208,900 -197,034	-49%	-$7.08M	0.81%	45
2020 Q3	$10.7M	Sell	405,934 -127,376	-24%	-$3.55M	1.21%	19
2020 Q2	$14.3M	Buy	533,310 +224,040	+72%	+$5.05M	1.63%	13
2020 Q1	$5.56M	Buy	+309,270	New	+$5.87M	0.83%	41

Other funds holding HALO

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return

Portolan Capital Management's HALO Position: Q2 2026 in Review

Portolan Capital Management opened a new position in Halozyme (HALO) in Q2 2026: 127,498 shares worth $9.98M. The stake represents 0.37% of the portfolio and ranks #82 among its holdings. This is a return to the name: Portolan Capital Management previously reported a position in HALO as recently as Q1 2021.

Portolan Capital Management first reported a position in HALO in Q1 2020 and has held it in 6 quarters since. The position peaked at $14.3M in Q2 2020. 671 funds tracked by Wall St. Rank hold HALO as of Q2 2026.

Portolan Capital Management held 127,498 shares of Halozyme worth $9.98M as of Q2 2026.
Halozyme was a new Portolan Capital Management position in Q2 2026.
Halozyme made up 0.37% of Portolan Capital Management's portfolio in Q2 2026, its #82 holding.
Portolan Capital Management first reported a position in Halozyme in Q1 2020 and has held it in 6 quarters since.
Portolan Capital Management's Halozyme position peaked at $14.3M in Q2 2020.
671 funds tracked by Wall St. Rank held Halozyme as of Q2 2026.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.