Citadel Advisors
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Citadel Advisors’s Research Frontiers REFR Stock Holding History

Citadel Advisors’s Portfolio REFR Stock Details REFR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q1 		– Sell
-6,300
Closed -$10.8K – 15393
2024
Q4 		$10.8K Buy
+6,300
New +$12.3K ﹤0.01% 13582
2024
Q3 		– Sell
-300
Closed -$552 – 15067
2024
Q2 		$552 Hold
300
– – ﹤0.01% 13964
2024
Q1 		$390 Buy
300
+100
+50% +$110 ﹤0.01% 14344
2023
Q4 		$202 Buy
+200
New +$208 ﹤0.01% 14095
2022
Q1 		– Sell
-15,400
Closed -$26K – 14413
2021
Q4 		$26K Sell
15,400
-6,200
-29% -$13.3K ﹤0.01% 13523
2021
Q3 		$55K Buy
+21,600
New +$49.9K ﹤0.01% 13320
2021
Q2 		– Sell
-14,300
Closed -$41K – 14293
2021
Q1 		$41K Buy
+14,300
New +$55.5K ﹤0.01% 12969
2019
Q4 		– Sell
-15,100
Closed -$48K – 9641
2019
Q3 		$48K Buy
+15,100
New +$57.4K ﹤0.01% 8718
2016
Q1 		– Sell
-4,500
Closed -$23K – 7756
2015
Q4 		$23K Buy
+4,500
New +$22.6K ﹤0.01% 7836
2015
Q2 		– Sell
-1,500
Closed -$9K – 9025
2015
Q1 		$9K Sell
1,500
-1,500
-50% -$7.8K ﹤0.01% 8221
2014
Q4 		$15K Buy
3,000
+800
+36% +$4.05K ﹤0.01% 7984
2014
Q3 		$13K Sell
2,200
-3,600
-62% -$18.9K ﹤0.01% 7677
2014
Q2 		$35K Sell
5,800
-1,400
-19% -$7.47K ﹤0.01% 6987
2014
Q1 		$37K Buy
7,200
+2,900
+67% +$18.4K ﹤0.01% 6959
2013
Q4 		$25K Buy
+4,300
New +$23.4K ﹤0.01% 6348

Other funds holding REFR

MOS
MGO One Seven Beachwood, Ohio $4.98B AUM 22.72% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Focus Partners Wealth
Focus Partners Wealth Boston, Massachusetts $89.9B AUM 20.5% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
SRC
Shufro Rose & Co New York $1.47B AUM 19.38% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Citadel Advisors's REFR Position: Q1 2026 in Review

Citadel Advisors sold out of Research Frontiers (REFR) in Q1 2026, closing a stake of 60,312 shares — an estimated $79K sold.

Citadel Advisors first reported a position in REFR in Q4 2013 and held it in 28 quarters. The position peaked at $121K in Q2 2020. 35 funds tracked by Wall St. Rank hold REFR as of Q1 2026.

  • Citadel Advisors reported no remaining Research Frontiers position as of Q1 2026 after selling out during the quarter.
  • Citadel Advisors sold 60,312 Research Frontiers shares in Q1 2026, an estimated $79K.
  • Citadel Advisors first reported a position in Research Frontiers in Q4 2013 and held it in 28 quarters.
  • Citadel Advisors's Research Frontiers position peaked at $121K in Q2 2020.
  • 35 funds tracked by Wall St. Rank held Research Frontiers as of Q1 2026.

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