Simplex Trading
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Simplex Trading’s Research Frontiers REFR Stock Holding History

Simplex Trading’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
Q4 		– Sell
-13,400
Closed -$21K – 9812
2025
Q3 		$21K Sell
13,400
-500
-4% -$756 ﹤0.01% 7297
2025
Q2 		$22K Buy
13,900
+7,300
+111% +$10.7K ﹤0.01% 6700
2025
Q1 		$7K Sell
6,600
-300
-4% -$429 ﹤0.01% 7364
2024
Q4 		$11K Buy
6,900
+900
+15% +$1.76K ﹤0.01% 7142
2024
Q3 		$13K Buy
6,000
+1,400
+30% +$2.9K ﹤0.01% 7021
2024
Q2 		$8K Buy
+4,600
New +$8.05K ﹤0.01% 7608
2023
Q1 		– Sell
-2,800
Closed -$5K – 9941
2022
Q4 		$5K Hold
2,800
– – ﹤0.01% 8090
2022
Q3 		$5K Buy
+2,800
New +$5.72K ﹤0.01% 8804
2022
Q1 		– Sell
-33,500
Closed -$57K – 11225
2021
Q4 		$57K Buy
33,500
+8,100
+32% +$17.3K ﹤0.01% 7087
2021
Q3 		$59K Hold
25,400
– – ﹤0.01% 7320
2021
Q2 		$60K Buy
+25,400
New +$63.3K ﹤0.01% 7433
2020
Q4 		– Sell
-212
Closed -$57K – 8933
2020
Q3 		$57K Sell
212
-165
-44% -$478 ﹤0.01% 5487
2020
Q2 		$153K Buy
377
+248
+192% +$920 ﹤0.01% 4304
2020
Q1 		$30K Buy
129
+19
+17% +$61 ﹤0.01% 5627
2019
Q4 		$33K Sell
110
-123
-53% -$394 ﹤0.01% 5580
2019
Q3 		$74K Buy
233
+196
+530% +$745 ﹤0.01% 4649
2019
Q2 		$12K Buy
+37
New +$105 ﹤0.01% 6011
2016
Q2 		– Sell
-47
Closed -$9K – 6347
2016
Q1 		$9K Buy
+47
New +$211 ﹤0.01% 3588
2015
Q3 		– Sell
-77
Closed -$3K – 6068
2015
Q2 		$3K Buy
+77
New +$453 ﹤0.01% 4089

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

Simplex Trading's REFR Position: Q1 2026 in Review

Simplex Trading opened a new position in Research Frontiers (REFR) in Q1 2026: 332 shares worth $305. The stake represents ﹤0.01% of the portfolio and ranks #8794 among its holdings. This is a return to the name: Simplex Trading previously reported a position in REFR as recently as Q2 2024.

Simplex Trading first reported a position in REFR in Q3 2015 and has held it in 18 quarters since. The position peaked at $72K in Q4 2019. 35 funds tracked by Wall St. Rank hold REFR as of Q1 2026.

  • Simplex Trading held 332 shares of Research Frontiers worth $305 as of Q1 2026.
  • Research Frontiers was a new Simplex Trading position in Q1 2026.
  • Research Frontiers made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #8794 holding.
  • Simplex Trading first reported a position in Research Frontiers in Q3 2015 and has held it in 18 quarters since.
  • Simplex Trading's Research Frontiers position peaked at $72K in Q4 2019.
  • 35 funds tracked by Wall St. Rank held Research Frontiers as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.