Ken Griffin
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Ken Griffin’s Flexible Solutions FSI Stock Holding History

Ken Griffin’s Portfolio FSI Stock Details FSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$201K Buy
37,237
+2,412
+7% +$13.9K ﹤0.01% 11410
2025
Q4 		$234K Buy
+34,825
New +$275K ﹤0.01% 10696
2025
Q3 		– Sell
-24,605
Closed -$119K – 13212
2025
Q2 		$119K Sell
24,605
-7,220
-23% -$30.3K ﹤0.01% 11166
2025
Q1 		$161K Buy
31,825
+8,612
+37% +$47.4K ﹤0.01% 10769
2024
Q4 		$83.8K Buy
23,213
+2,590
+13% +$9.89K ﹤0.01% 11725
2024
Q3 		$75.2K Buy
+20,623
New +$53.9K ﹤0.01% 11478
2024
Q2 		– Sell
-22,392
Closed -$42.1K – 14644
2024
Q1 		$42.1K Buy
+22,392
New +$42.1K ﹤0.01% 12343
2023
Q4 		– Sell
-23,584
Closed -$64.1K – 14609
2023
Q3 		$64.1K Sell
23,584
-1,379
-6% -$3.75K ﹤0.01% 11443
2023
Q2 		$66.7K Buy
+24,963
New +$73.2K ﹤0.01% 11461
2021
Q4 		– Sell
-20,968
Closed -$75K – 14115
2021
Q3 		$75K Buy
20,968
+8,234
+65% +$30.9K ﹤0.01% 13109
2021
Q2 		$50K Buy
+12,734
New +$43.5K ﹤0.01% 13333
2019
Q1 		– Sell
-10,742
Closed -$15K – 9465
2018
Q4 		$15K Buy
+10,742
New +$15.6K ﹤0.01% 8839
2017
Q1 		– Sell
-25,523
Closed -$35K – 7630
2016
Q4 		$35K Buy
+25,523
New +$42.1K ﹤0.01% 6949
2016
Q2 		– Sell
-24,261
Closed -$22K – 6990
2016
Q1 		$22K Buy
+24,261
New +$21.5K ﹤0.01% 6440
2015
Q4 		– Sell
-14,981
Closed -$15K – 8858
2015
Q3 		$15K Sell
14,981
-33,916
-69% -$40.1K ﹤0.01% 8323
2015
Q2 		$100K Buy
+48,897
New +$89.6K ﹤0.01% 7075
2015
Q1 		– Sell
-12,214
Closed -$14K – 8618
2014
Q4 		$14K Sell
12,214
-39
-0.3% -$44 ﹤0.01% 8011
2014
Q3 		$16K Sell
12,253
-11,015
-47% -$14.2K ﹤0.01% 7585
2014
Q2 		$20K Sell
23,268
-6,908
-23% -$4.92K ﹤0.01% 7277
2014
Q1 		$24K Buy
30,176
+9,812
+48% +$8.57K ﹤0.01% 7204
2013
Q4 		$19K Buy
+20,364
New +$19.5K ﹤0.01% 6489

Other funds holding FSI

Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
NSIM
North Star Investment Management Chicago, Illinois $1.84B AUM 28.81% 1-Year Est. Return
BCM
Beartown Capital Management Huntington Woods, Michigan $209M AUM
RIA
Regal Investment Advisors Kentwood, Michigan $1.73B AUM 17.74% 1-Year Est. Return
EIM
Essex Investment Management Boston, Massachusetts $632M AUM 95.36% 1-Year Est. Return
CAG
Crestwood Advisors Group Boston, Massachusetts $6.74B AUM 30.22% 1-Year Est. Return
QCM
Quantinno Capital Management New York $83.3B AUM 37.97% 1-Year Est. Return
OSAM
O'Shaughnessy Asset Management Stamford, Connecticut $21.7B AUM 41.93% 1-Year Est. Return

Ken Griffin's FSI Position: Q1 2026 in Review

Ken Griffin increased its Flexible Solutions (FSI) stake by 6.9% in Q1 2026, buying an estimated $13.9K and bringing the position to 37,237 shares worth $201K. The position accounts for ﹤0.01% of the portfolio, ranked #11410.

Ken Griffin first reported a position in FSI in Q4 2013 and has held it in 21 quarters since. The position peaked at $234K in Q4 2025. 31 funds tracked by Wall St. Rank hold FSI as of Q1 2026.

  • Ken Griffin held 37,237 shares of Flexible Solutions worth $201K as of Q1 2026.
  • Ken Griffin bought 2,412 Flexible Solutions shares in Q1 2026, an estimated $13.9K.
  • Flexible Solutions made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #11410 holding.
  • Ken Griffin first reported a position in Flexible Solutions in Q4 2013 and has held it in 21 quarters since.
  • Ken Griffin's Flexible Solutions position peaked at $234K in Q4 2025.
  • 31 funds tracked by Wall St. Rank held Flexible Solutions as of Q1 2026.

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