Simplex Trading
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Simplex Trading’s Main Street Capital MAIN Stock Holding History

Simplex Trading’s Portfolio MAIN Stock Details MAIN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.35M Sell
25,400
-26,200
-51% -$1.55M ﹤0.01% 2192
2025
Q4 		$3.12M Sell
51,600
-20,100
-28% -$1.19M ﹤0.01% 1627
2025
Q3 		$4.56M Buy
71,700
+29,900
+72% +$1.93M ﹤0.01% 1549
2025
Q2 		$2.47M Sell
41,800
-8,400
-17% -$464K ﹤0.01% 1919
2025
Q1 		$2.84M Buy
50,200
+46,600
+1,294% +$2.77M ﹤0.01% 1713
2024
Q4 		$210K Buy
3,600
+400
+13% +$21.3K ﹤0.01% 4462
2024
Q3 		$160K Sell
3,200
-300
-9% -$15K ﹤0.01% 4745
2024
Q2 		$176K Buy
3,500
+3,100
+775% +$151K ﹤0.01% 4781
2024
Q1 		$18K Sell
400
-2,900
-88% -$131K ﹤0.01% 7176
2023
Q4 		$142K Buy
3,300
+300
+10% +$12.3K ﹤0.01% 5026
2023
Q3 		$121K Sell
3,000
-5,000
-63% -$204K ﹤0.01% 4898
2023
Q2 		$320K Sell
8,000
-5,500
-41% -$218K ﹤0.01% 3761
2023
Q1 		$532K Buy
13,500
+10,300
+322% +$406K ﹤0.01% 3202
2022
Q4 		$118K Sell
3,200
-23,500
-88% -$859K ﹤0.01% 4874
2022
Q3 		$898K Buy
26,700
+21,900
+456% +$902K ﹤0.01% 2774
2022
Q2 		$184K Sell
4,800
-25,400
-84% -$993K ﹤0.01% 4718
2022
Q1 		$1.29M Buy
30,200
+16,900
+127% +$724K ﹤0.01% 2599
2021
Q4 		$596K Buy
13,300
+900
+7% +$39.6K ﹤0.01% 3561
2021
Q3 		$510K Buy
12,400
+100
+0.8% +$4.16K ﹤0.01% 4082
2021
Q2 		$505K Buy
12,300
+12,003
+4,041% +$499K ﹤0.01% 4148
2021
Q1 		$1.16M Buy
297
+83
+39% +$2.91K ﹤0.01% 2228
2020
Q4 		$690K Sell
214
-51
-19% -$1.57K ﹤0.01% 3031
2020
Q3 		$783K Buy
265
+25
+10% +$766 ﹤0.01% 2505
2020
Q2 		$747K Buy
240
+37
+18% +$1.04K ﹤0.01% 2426
2020
Q1 		$416K Buy
203
+166
+449% +$6.21K ﹤0.01% 2791
2019
Q4 		$159K Buy
37
+34
+1,133% +$1.45K ﹤0.01% 4001
2019
Q3 		$12K Sell
3
-13
-81% -$555 ﹤0.01% 6146
2019
Q2 		$65K Sell
16
-12
-43% -$478 ﹤0.01% 4618
2019
Q1 		$104K Sell
28
-75
-73% -$2.79K ﹤0.01% 4301
2018
Q4 		$348K Buy
103
+84
+442% +$3.12K ﹤0.01% 2569
2018
Q3 		$73K Buy
19
+18
+1,800% +$713 ﹤0.01% 4763
2018
Q2 		$3K Sell
1
-212
-100% -$8.07K ﹤0.01% 6929
2018
Q1 		$65K Buy
213
+194
+1,021% +$7.27K ﹤0.01% 2169
2017
Q4 		$1K Sell
19
-65
-77% -$2.62K ﹤0.01% 5561
2017
Q3 		$4K Buy
+84
New +$3.3K ﹤0.01% 4571
2017
Q2 		– Sell
-61
Closed -$1K – 6493
2017
Q1 		$1K Sell
61
-14
-19% -$517 ﹤0.01% 5698
2016
Q4 		$8K Buy
75
+37
+97% +$1.31K ﹤0.01% 3935
2016
Q3 		$7K Sell
38
-141
-79% -$4.77K ﹤0.01% 3951
2016
Q2 		$9K Buy
179
+78
+77% +$2.48K ﹤0.01% 3686
2016
Q1 		$5K Buy
+101
New +$2.93K ﹤0.01% 4092
2015
Q4 		– Sell
-5
Closed -$1K – 5808
2015
Q3 		$1K Buy
+5
New +$148 ﹤0.01% 5059

Other funds holding MAIN

T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Legal & General Group
Legal & General Group London, United Kingdom $432B AUM 29.4% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return
MC
Muzinich & Co New York $286M AUM 21.05% 1-Year Est. Return
AHC
Adell Harriman & Carpenter Houston, Texas $1.64B AUM 36.77% 1-Year Est. Return

Simplex Trading's MAIN Position: Q1 2026 in Review

Simplex Trading reduced its Main Street Capital (MAIN) stake by 72% in Q1 2026, selling an estimated $73.6K and leaving 480 shares worth $25.4K. The position accounts for ﹤0.01% of the portfolio, ranked #6560.

Simplex Trading first reported a position in MAIN in Q2 2015 and has held it in 18 quarters since. The position peaked at $1.14M in Q1 2025. 421 funds tracked by Wall St. Rank hold MAIN as of Q1 2026.

  • Simplex Trading held 480 shares of Main Street Capital worth $25.4K as of Q1 2026.
  • Simplex Trading sold 1,243 Main Street Capital shares in Q1 2026, an estimated $73.6K.
  • Main Street Capital made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #6560 holding.
  • Simplex Trading first reported a position in Main Street Capital in Q2 2015 and has held it in 18 quarters since.
  • Simplex Trading's Main Street Capital position peaked at $1.14M in Q1 2025.
  • 421 funds tracked by Wall St. Rank held Main Street Capital as of Q1 2026.

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