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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 		$1.17M Sell
18,231
-365,580
-95% -$19M ﹤0.01% 7811
2026
Q1 		$18.5M Buy
383,811
+340,914
+795% +$15.1M ﹤0.01% 2333
2025
Q4 		$1.77M Buy
42,897
+35,958
+518% +$1.44M ﹤0.01% 5905
2025
Q3 		$269K Sell
6,939
-132,843
-95% -$4.32M ﹤0.01% 10363
2025
Q2 		$3.87M Buy
139,782
+85,503
+158% +$2.18M ﹤0.01% 4465
2025
Q1 		$1.21M Sell
54,279
-23,829
-31% -$490K ﹤0.01% 6790
2024
Q4 		$1.54M Buy
78,108
+11,541
+17% +$263K ﹤0.01% 5891
2024
Q3 		$1.66M Buy
66,567
+55,957
+527% +$1.36M ﹤0.01% 5672
2024
Q2 		$198K Sell
10,610
-120,613
-92% -$2.26M ﹤0.01% 10370
2024
Q1 		$2.59M Buy
131,223
+95,330
+266% +$1.86M ﹤0.01% 4804
2023
Q4 		$630K Sell
35,893
-173,527
-83% -$2.85M ﹤0.01% 8105
2023
Q3 		$3.64M Buy
209,420
+195,772
+1,434% +$3.3M ﹤0.01% 4062
2023
Q2 		$192K Sell
13,648
-83,430
-86% -$1.12M ﹤0.01% 10315
2023
Q1 		$1.04M Buy
97,078
+52,776
+119% +$695K ﹤0.01% 6706
2022
Q4 		$664K Buy
+44,302
New +$645K ﹤0.01% 7149
2022
Q2 		– Sell
-30,868
Closed -$288K – 13449
2022
Q1 		$307K Sell
30,868
-86,673
-74% -$918K ﹤0.01% 10226
2021
Q4 		$1.38M Sell
117,541
-9,650
-8% -$119K ﹤0.01% 6413
2021
Q3 		$1.45M Buy
127,191
+32,178
+34% +$419K ﹤0.01% 6575
2021
Q2 		$1.32M Buy
95,013
+34,140
+56% +$519K ﹤0.01% 6979
2021
Q1 		$1.13M Buy
60,873
+49,112
+418% +$1M ﹤0.01% 7420
2020
Q4 		$208K Sell
11,761
-4,524
-28% -$79.5K ﹤0.01% 9971
2020
Q3 		$249K Buy
+16,285
New +$306K ﹤0.01% 9072

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. 266 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.
  • 266 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.