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 		$25.4K Sell
480
-1,243
-72% -$73.6K ﹤0.01% 6560
2025
Q4 		$104K Buy
+1,723
New +$102K ﹤0.01% 4955
2025
Q3 		– Sell
-4,047
Closed -$262K – 9616
2025
Q2 		$239K Sell
4,047
-16,067
-80% -$888K ﹤0.01% 4322
2025
Q1 		$1.14M Buy
+20,114
New +$1.2M ﹤0.01% 2587
2022
Q4 		– Sell
-5,943
Closed -$217K – 9891
2022
Q3 		$199K Buy
+5,943
New +$245K ﹤0.01% 4614
2021
Q4 		– Sell
-6,783
Closed -$298K – 11000
2021
Q3 		$279K Hold
6,783
– – ﹤0.01% 5038
2021
Q2 		$278K Buy
+6,783
New +$282K ﹤0.01% 5122
2021
Q1 		– Sell
-5,789
Closed -$203K – 9497
2020
Q4 		$186K Sell
5,789
-3,154
-35% -$96.9K ﹤0.01% 4709
2020
Q3 		$264K Buy
8,943
+2,712
+44% +$83.1K ﹤0.01% 3760
2020
Q2 		$193K Buy
+6,231
New +$176K ﹤0.01% 4047
2019
Q1 		– Sell
-9,673
Closed -$360K – 7529
2018
Q4 		$327K Buy
9,673
+6,016
+165% +$224K ﹤0.01% 2632
2018
Q3 		$140K Buy
+3,657
New +$145K ﹤0.01% 4055
2018
Q2 		– Sell
-16,375
Closed -$623K – 7662
2018
Q1 		$604K Buy
16,375
+15,194
+1,287% +$569K 0.03% 632
2017
Q4 		$46K Sell
1,181
-3,351
-74% -$135K ﹤0.01% 2533
2017
Q3 		$180K Buy
4,532
+4,279
+1,691% +$168K 0.01% 1259
2017
Q2 		$9K Buy
+253
New +$9.82K ﹤0.01% 4069
2017
Q1 		– Sell
-2,060
Closed -$76.1K – 6500
2016
Q4 		$75K Buy
+2,060
New +$72.8K ﹤0.01% 1772
2015
Q3 		– Sell
-302
Closed -$8.93K – 5884
2015
Q2 		$9K Buy
+302
New +$9.43K ﹤0.01% 3153

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.