Citadel Advisors
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Citadel Advisors’s Halozyme HALO Stock Holding History

Citadel Advisors’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
Q1 		$2.77M Buy
42,800
+26,600
+164% +$1.88M ﹤0.01% 5431
2025
Q4 		$1.09M Sell
16,200
-23,400
-59% -$1.57M ﹤0.01% 7203
2025
Q3 		$2.9M Sell
39,600
-14,700
-27% -$976K ﹤0.01% 5357
2025
Q2 		$2.82M Buy
54,300
+23,700
+77% +$1.35M ﹤0.01% 5074
2025
Q1 		$1.95M Sell
30,600
-81,000
-73% -$4.71M ﹤0.01% 5575
2024
Q4 		$5.34M Buy
111,600
+67,900
+155% +$3.48M ﹤0.01% 3855
2024
Q3 		$2.5M Buy
43,700
+32,400
+287% +$1.86M ﹤0.01% 5108
2024
Q2 		$592K Sell
11,300
-6,800
-38% -$298K ﹤0.01% 7706
2024
Q1 		$736K Buy
18,100
+3,100
+21% +$116K ﹤0.01% 7558
2023
Q4 		$554K Buy
15,000
+7,600
+103% +$286K ﹤0.01% 7877
2023
Q3 		$283K Sell
7,400
-6,000
-45% -$246K ﹤0.01% 9281
2023
Q2 		$483K Sell
13,400
-4,400
-25% -$150K ﹤0.01% 8015
2023
Q1 		$680K Sell
17,800
-4,700
-21% -$220K ﹤0.01% 7646
2022
Q4 		$1.28M Buy
22,500
+1,800
+9% +$92.2K ﹤0.01% 6337
2022
Q3 		$818K Buy
20,700
+4,800
+30% +$212K ﹤0.01% 7428
2022
Q2 		$700K Sell
15,900
-2,500
-14% -$108K ﹤0.01% 7869
2022
Q1 		$734K Sell
18,400
-4,600
-20% -$164K ﹤0.01% 8449
2021
Q4 		$925K Sell
23,000
-3,300
-13% -$123K ﹤0.01% 8145
2021
Q3 		$1.07M Buy
26,300
+1,400
+6% +$58.5K ﹤0.01% 7976
2021
Q2 		$1.13M Sell
24,900
-2,100
-8% -$92.9K ﹤0.01% 8042
2021
Q1 		$1.13M Buy
27,000
+10,900
+68% +$498K ﹤0.01% 7810
2020
Q4 		$688K Sell
16,100
-2,100
-12% -$75.5K ﹤0.01% 7533
2020
Q3 		$478K Sell
18,200
-3,000
-14% -$83.5K ﹤0.01% 7377
2020
Q2 		$568K Sell
21,200
-500
-2% -$11.3K ﹤0.01% 6850
2020
Q1 		$390K Sell
21,700
-32,100
-60% -$609K ﹤0.01% 6867
2019
Q4 		$954K Buy
53,800
+5,400
+11% +$93.5K ﹤0.01% 5670
2019
Q3 		$751K Buy
48,400
+25,500
+111% +$420K ﹤0.01% 6083
2019
Q2 		$393K Sell
22,900
-2,200
-9% -$35.5K ﹤0.01% 7174
2019
Q1 		$404K Sell
25,100
-75,900
-75% -$1.23M ﹤0.01% 7148
2018
Q4 		$1.48M Buy
101,000
+49,300
+95% +$786K ﹤0.01% 4661
2018
Q3 		$939K Buy
51,700
+15,500
+43% +$272K ﹤0.01% 5669
2018
Q2 		$611K Buy
36,200
+15,800
+77% +$299K ﹤0.01% 6048
2018
Q1 		$400K Sell
20,400
-11,900
-37% -$230K ﹤0.01% 6266
2017
Q4 		$654K Buy
32,300
+9,700
+43% +$178K ﹤0.01% 5273
2017
Q3 		$393K Buy
22,600
+6,000
+36% +$81.3K ﹤0.01% 5655
2017
Q2 		$213K Sell
16,600
-16,200
-49% -$216K ﹤0.01% 6474
2017
Q1 		$425K Buy
32,800
+21,700
+195% +$274K ﹤0.01% 5296
2016
Q4 		$110K Sell
11,100
-1,700
-13% -$18.6K ﹤0.01% 6635
2016
Q3 		$155K Buy
+12,800
New +$131K ﹤0.01% 6448
2016
Q1 		– Sell
-15,800
Closed -$274K – 7244
2015
Q4 		$274K Sell
15,800
-2,400
-13% -$38.3K ﹤0.01% 5350
2015
Q3 		$244K Sell
18,200
-3,600
-17% -$72.3K ﹤0.01% 5865
2015
Q2 		$492K Sell
21,800
-7,500
-26% -$132K ﹤0.01% 5005
2015
Q1 		$418K Buy
29,300
+12,400
+73% +$179K ﹤0.01% 5197
2014
Q4 		$163K Sell
16,900
-1,100
-6% -$9.77K ﹤0.01% 6200
2014
Q3 		$164K Sell
18,000
-9,500
-35% -$90.5K ﹤0.01% 5930
2014
Q2 		$272K Buy
27,500
+12,100
+79% +$103K ﹤0.01% 5186
2014
Q1 		$196K Sell
15,400
-30,300
-66% -$450K ﹤0.01% 5536
2013
Q4 		$685K Buy
45,700
+2,500
+6% +$32.2K ﹤0.01% 3645
2013
Q3 		$477K Buy
43,200
+23,600
+120% +$197K ﹤0.01% 3865
2013
Q2 		$156K Buy
+19,600
New +$125K ﹤0.01% 4875

Other funds holding HALO

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Citadel Advisors's HALO Position: Q1 2026 in Review

Citadel Advisors opened a new position in Halozyme (HALO) in Q1 2026: 191,051 shares worth $12.3M. The stake represents ﹤0.01% of the portfolio and ranks #2954 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in HALO as recently as Q3 2025.

Citadel Advisors first reported a position in HALO in Q2 2013 and has held it in 49 quarters since. The position peaked at $60.4M in Q4 2024. 634 funds tracked by Wall St. Rank hold HALO as of Q1 2026.

  • Citadel Advisors held 191,051 shares of Halozyme worth $12.3M as of Q1 2026.
  • Halozyme was a new Citadel Advisors position in Q1 2026.
  • Halozyme made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #2954 holding.
  • Citadel Advisors first reported a position in Halozyme in Q2 2013 and has held it in 49 quarters since.
  • Citadel Advisors's Halozyme position peaked at $60.4M in Q4 2024.
  • 634 funds tracked by Wall St. Rank held Halozyme as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.