Ken Griffin
BY icon

Ken Griffin’s Byline Bancorp BY Stock Holding History

Ken Griffin’s Portfolio BY Stock Details BY Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2024
Q2 		– Sell
-500
Closed -$10.9K – 14313
2024
Q1 		$10.9K Buy
+500
New +$10.8K ﹤0.01% 13444
2023
Q2 		– Sell
-300
Closed -$6.49K – 14394
2023
Q1 		$6.49K Buy
+300
New +$7K ﹤0.01% 13802

Other funds holding BY

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
ACB
Aristotle Capital Boston Boston, Massachusetts $1.61B AUM 19.82% 1-Year Est. Return

Ken Griffin's BY Position: Q1 2026 in Review

Ken Griffin reduced its Byline Bancorp (BY) stake by 13% in Q1 2026, selling an estimated $252K and leaving 55,022 shares worth $1.74M. The position accounts for ﹤0.01% of the portfolio, ranked #6392.

Ken Griffin first reported a position in BY in Q2 2017 and has held it in 23 quarters since. The position peaked at $5.53M in Q2 2025. 188 funds tracked by Wall St. Rank hold BY as of Q1 2026.

  • Ken Griffin held 55,022 shares of Byline Bancorp worth $1.74M as of Q1 2026.
  • Ken Griffin sold 8,043 Byline Bancorp shares in Q1 2026, an estimated $252K.
  • Byline Bancorp made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #6392 holding.
  • Ken Griffin first reported a position in Byline Bancorp in Q2 2017 and has held it in 23 quarters since.
  • Ken Griffin's Byline Bancorp position peaked at $5.53M in Q2 2025.
  • 188 funds tracked by Wall St. Rank held Byline Bancorp as of Q1 2026.

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