Janus Henderson Group
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Janus Henderson Group’s SIGA Technologies SIGA Stock Holding History

Janus Henderson Group’s Portfolio SIGA Stock Details SIGA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1M Sell
187,521
-1,196
-0.6% -$7.46K ﹤0.01% 1692
2025
Q4 		$1.15M Sell
188,717
-100,369
-35% -$714K ﹤0.01% 1600
2025
Q3 		$2.65M Buy
289,086
+269,507
+1,377% +$2.15M ﹤0.01% 1202
2025
Q2 		$128K Hold
19,579
– – ﹤0.01% 2380
2025
Q1 		$109K Hold
19,579
– – ﹤0.01% 2455
2024
Q4 		$118K Hold
19,579
– – ﹤0.01% 2500
2024
Q3 		$132K Hold
19,579
– – ﹤0.01% 2491
2024
Q2 		$148K Sell
19,579
-210
-1% -$1.71K ﹤0.01% 2461
2024
Q1 		$169K Buy
19,789
+5
+0% +$29 ﹤0.01% 2454
2023
Q4 		$111K Sell
19,784
-36
-0.2% -$193 ﹤0.01% 2520
2023
Q3 		$104K Sell
19,820
-1
-0% -$5 ﹤0.01% 2511
2023
Q2 		$100K Sell
19,821
-131,224
-87% -$746K ﹤0.01% 2567
2023
Q1 		$868K Buy
151,045
+57,270
+61% +$383K ﹤0.01% 1715
2022
Q4 		$690K Sell
93,775
-108,111
-54% -$948K ﹤0.01% 1543
2022
Q3 		$2.08M Buy
201,886
+100,945
+100% +$1.62M ﹤0.01% 1274
2022
Q2 		$1.17M Buy
+100,941
New +$910K ﹤0.01% 1255
2020
Q1 		– Sell
-47,051
Closed -$224K – 1407
2019
Q4 		$224K Buy
47,051
+2,449
+5% +$12.5K ﹤0.01% 1385
2019
Q3 		$228K Buy
44,602
+6,060
+16% +$32.7K ﹤0.01% 1367
2019
Q2 		$219K Buy
+38,542
New +$213K ﹤0.01% 1346

Other funds holding SIGA

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
AC
AltraVue Capital Bellevue, Washington $1.16B AUM 46.45% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
FWSM
First Wilshire Securities Management Pasadena, California $444M AUM 42.88% 1-Year Est. Return

Janus Henderson Group's SIGA Position: Q1 2026 in Review

Janus Henderson Group reduced its SIGA Technologies (SIGA) stake by 0.63% in Q1 2026, selling an estimated $7.46K and leaving 187,521 shares worth $1M. The position accounts for ﹤0.01% of the portfolio, ranked #1692.

Janus Henderson Group first reported a position in SIGA in Q2 2019 and has held it in 19 quarters since. The position peaked at $2.65M in Q3 2025. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

  • Janus Henderson Group held 187,521 shares of SIGA Technologies worth $1M as of Q1 2026.
  • Janus Henderson Group sold 1,196 SIGA Technologies shares in Q1 2026, an estimated $7.46K.
  • SIGA Technologies made up ﹤0.01% of Janus Henderson Group's portfolio in Q1 2026, its #1692 holding.
  • Janus Henderson Group first reported a position in SIGA Technologies in Q2 2019 and has held it in 19 quarters since.
  • Janus Henderson Group's SIGA Technologies position peaked at $2.65M in Q3 2025.
  • 183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.