Ken Griffin
MBSF icon

Ken Griffin’s Regan Floating Rate MBS ETF MBSF Stock Holding History

Ken Griffin’s Portfolio MBSF Stock Details MBSF Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-12,847
Closed -$329K – 14445
2025
Q4 		$329K Sell
12,847
-16,353
-56% -$418K ﹤0.01% 9940
2025
Q3 		$744K Buy
29,200
+6,616
+29% +$169K ﹤0.01% 8199
2025
Q2 		$576K Buy
22,584
+7,713
+52% +$196K ﹤0.01% 8319
2025
Q1 		$379K Buy
+14,871
New +$380K ﹤0.01% 9075
2024
Q4 		– Sell
-8,400
Closed -$215K – 15534
2024
Q3 		$215K Buy
+8,400
New +$215K ﹤0.01% 9989

Other funds holding MBSF

CP
Castleview Partners Dallas, Texas $228M AUM 19.85% 1-Year Est. Return
CFD
Creative Financial Designs Kokomo, Indiana $2.1B AUM 23.1% 1-Year Est. Return
VAG
VisionPoint Advisory Group Dallas, Texas $613M AUM 30.37% 1-Year Est. Return
AI
Auour Investments Woburn, Massachusetts $349M AUM 13.68% 1-Year Est. Return
BFO
Biltmore Family Office Charlotte, North Carolina $761M AUM 31.91% 1-Year Est. Return
Royal Bank of Canada
Royal Bank of Canada Toronto, Ontario, Canada $570B AUM 27.57% 1-Year Est. Return
CA
CWC Advisors Lake Oswego, Oregon $225M AUM 23.94% 1-Year Est. Return
SCM
Sterneck Capital Management Kansas City, Missouri $233M AUM 21.98% 1-Year Est. Return
State of New Jersey Common Pension Fund D
State of New Jersey Common Pension Fund D Trenton, New Jersey $29.3B AUM 38.15% 1-Year Est. Return
UAS
United Asset Strategies Garden City, New York $1.41B AUM 27.73% 1-Year Est. Return

Ken Griffin's MBSF Position: Q1 2026 in Review

Ken Griffin sold out of Regan Floating Rate MBS ETF (MBSF) in Q1 2026, closing a stake of 12,847 shares — an estimated $329K sold.

Ken Griffin first reported a position in MBSF in Q3 2024 and held it in 5 quarters. The position peaked at $744K in Q3 2025. 58 funds tracked by Wall St. Rank hold MBSF as of Q1 2026.

  • Ken Griffin reported no remaining Regan Floating Rate MBS ETF position as of Q1 2026 after selling out during the quarter.
  • Ken Griffin sold 12,847 Regan Floating Rate MBS ETF shares in Q1 2026, an estimated $329K.
  • Ken Griffin first reported a position in Regan Floating Rate MBS ETF in Q3 2024 and held it in 5 quarters.
  • Ken Griffin's Regan Floating Rate MBS ETF position peaked at $744K in Q3 2025.
  • 58 funds tracked by Wall St. Rank held Regan Floating Rate MBS ETF as of Q1 2026.

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