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Jeff Yass’s Kiniksa Pharmaceuticals KNSA Stock Holding History

Jeff Yass’s Portfolio KNSA Stock Details KNSA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.77M Buy
27,700
+15,000
+118% +$778K ﹤0.01% 6773
2026
Q1 		$612K Sell
12,700
-42,900
-77% -$1.9M ﹤0.01% 9138
2025
Q4 		$2.29M Sell
55,600
-35,200
-39% -$1.41M ﹤0.01% 5353
2025
Q3 		$3.53M Buy
+90,800
New +$2.95M ﹤0.01% 4677
2025
Q1 		– Sell
-55,700
Closed -$1.1M – 13012
2024
Q4 		$1.1M Sell
55,700
-1,100
-2% -$25.1K ﹤0.01% 6714
2024
Q3 		$1.42M Sell
56,800
-5,400
-9% -$132K ﹤0.01% 6030
2024
Q2 		$1.16M Sell
62,200
-69,600
-53% -$1.3M ﹤0.01% 6234
2024
Q1 		$2.6M Buy
131,800
+39,500
+43% +$771K ﹤0.01% 4791
2023
Q4 		$1.62M Buy
92,300
+48,600
+111% +$799K ﹤0.01% 5821
2023
Q3 		$759K Buy
43,700
+23,900
+121% +$403K ﹤0.01% 7266
2023
Q2 		$279K Buy
+19,800
New +$265K ﹤0.01% 9591
2023
Q1 		– Sell
-19,800
Closed -$297K – 13070
2022
Q4 		$297K Sell
19,800
-87,100
-81% -$1.27M ﹤0.01% 9127
2022
Q3 		$1.37M Buy
106,900
+40,100
+60% +$457K ﹤0.01% 5804
2022
Q2 		$647K Buy
66,800
+42,000
+169% +$392K ﹤0.01% 7635
2022
Q1 		$247K Sell
24,800
-54,000
-69% -$572K ﹤0.01% 10745
2021
Q4 		$927K Sell
78,800
-11,300
-13% -$139K ﹤0.01% 7506
2021
Q3 		$1.03M Sell
90,100
-15,800
-15% -$206K ﹤0.01% 7498
2021
Q2 		$1.48M Buy
105,900
+37,600
+55% +$571K ﹤0.01% 6688
2021
Q1 		$1.26M Sell
68,300
-4,200
-6% -$85.9K ﹤0.01% 7102
2020
Q4 		$1.28M Buy
72,500
+57,000
+368% +$1M ﹤0.01% 6094
2020
Q3 		$237K Sell
15,500
-14,200
-48% -$267K ﹤0.01% 9173
2020
Q2 		$757K Buy
+29,700
New +$620K ﹤0.01% 6501

Other funds holding KNSA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
TCM
Tang Capital Management San Diego, California $2.2B AUM 156.35% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
SSC
Spruce Street Capital New York $510M AUM

Jeff Yass's KNSA Position: Q2 2026 in Review

Jeff Yass reduced its Kiniksa Pharmaceuticals (KNSA) stake by 95% in Q2 2026, selling an estimated $19M and leaving 18,231 shares worth $1.17M. The position accounts for ﹤0.01% of the portfolio, ranked #7811.

Jeff Yass first reported a position in KNSA in Q3 2020 and has held it in 22 quarters since. The position peaked at $18.5M in Q1 2026. 265 funds tracked by Wall St. Rank hold KNSA as of Q2 2026.

  • Jeff Yass held 18,231 shares of Kiniksa Pharmaceuticals worth $1.17M as of Q2 2026.
  • Jeff Yass sold 365,580 Kiniksa Pharmaceuticals shares in Q2 2026, an estimated $19M.
  • Kiniksa Pharmaceuticals made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #7811 holding.
  • Jeff Yass first reported a position in Kiniksa Pharmaceuticals in Q3 2020 and has held it in 22 quarters since.
  • Jeff Yass's Kiniksa Pharmaceuticals position peaked at $18.5M in Q1 2026.
  • 265 funds tracked by Wall St. Rank held Kiniksa Pharmaceuticals as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.