Ken Griffin
FBLG icon

Ken Griffin’s FibroBiologics FBLG Stock Holding History

Ken Griffin’s Portfolio FBLG Stock Details FBLG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-10,557
Closed -$115K – 14311
2025
Q3 		$115K Sell
10,557
-1,111
-10% -$13.3K ﹤0.01% 11745
2025
Q2 		$145K Buy
11,668
+9,257
+384% +$167K ﹤0.01% 10988
2025
Q1 		$43.4K Buy
+2,411
New +$68.9K ﹤0.01% 12453

Other funds holding FBLG

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
CFP
Cascade Financial Partners San Diego, California $1.15B AUM 33.6% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
ANTB
AMG National Trust Bank Greenwood Village, Colorado $4.88B AUM 24.08% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Ken Griffin's FBLG Position: Q4 2025 in Review

Ken Griffin sold out of FibroBiologics (FBLG) in Q4 2025, closing a stake of 10,557 shares — an estimated $115K sold.

Ken Griffin first reported a position in FBLG in Q1 2025 and held it in 3 quarters. The position peaked at $145K in Q2 2025. 45 funds tracked by Wall St. Rank hold FBLG as of Q4 2025.

  • Ken Griffin reported no remaining FibroBiologics position as of Q4 2025 after selling out during the quarter.
  • Ken Griffin sold 10,557 FibroBiologics shares in Q4 2025, an estimated $115K.
  • Ken Griffin first reported a position in FibroBiologics in Q1 2025 and held it in 3 quarters.
  • Ken Griffin's FibroBiologics position peaked at $145K in Q2 2025.
  • 45 funds tracked by Wall St. Rank held FibroBiologics as of Q4 2025.

Based on Citadel Advisors's 13F filing for Q4 2025, filed 17 Feb 2026.