Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 | +$237M | |
| 2 | +$103M | |
| 3 | +$93.9M | |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.5M |
| 5 |
Pinduoduo
PDD
|
+$61.3M |
Top Sells
| 1 | +$129M | |
| 2 | +$108M | |
| 3 | +$89.1M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$79.3M |
| 5 |
Micron Technology
MU
|
+$64.3M |
Sector Composition
| 1 | Technology | 34.04% |
| 2 | Consumer Discretionary | 13.08% |
| 3 | Healthcare | 10.63% |
| 4 | Financials | 7.02% |
| 5 | Industrials | 3.96% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
976
Qfin Holdings
QFIN
$3.08B
| $280K | ﹤0.01% |
9,762
+3,781
|
|
||
977
Wheels Up
UP
$816M
| $280K | ﹤0.01% |
152,479
+149,478
|
|
||
978
HNI Corp
HNI
$1.79B
| $279K | ﹤0.01% |
5,972
+5,792
|
|
||
979
VanEck Vietnam ETF
VNM
$568M
| $279K | ﹤0.01% |
+15,690
|
|
||
|
TGEN
980
Tecogen Inc
TGEN
$206M
| $278K | ﹤0.01% |
+31,562
|
|
||
981
Designer Brands
DBI
$189M
| $274K | ﹤0.01% |
77,624
-10,897
|
|
||
982
Domo
DOMO
$510M
| $274K | ﹤0.01% |
17,298
-100,340
|
|
||
983
LifeMD
LFMD
$219M
| $274K | ﹤0.01% |
40,379
-58,505
|
|
||
984
Akebia Therapeutics
AKBA
$467M
| $273K | ﹤0.01% |
100,103
-92,931
|
|
||
985
Virtu Financial
VIRT
$3.02B
| $273K | ﹤0.01% |
+7,694
|
|
||
986
Krispy Kreme
DNUT
$671M
| $272K | ﹤0.01% |
70,448
+25,467
|
|
||
987
Seadrill
SDRL
$1.85B
| $271K | ﹤0.01% |
8,977
-2,692
|
|
||
988
Iridium Communications
IRDM
$1.75B
| $270K | ﹤0.01% |
+15,516
|
|
||
989
Open Text
OTEX
$8.64B
| $270K | ﹤0.01% |
+7,242
|
|
||
990
Denison Mines
DNN
$2.23B
| $269K | ﹤0.01% |
+97,984
|
|
||
991
Howard Hughes
HHH
$5.17B
| $267K | ﹤0.01% |
3,256
-12,063
|
|
||
992
Cipher Mining
CIFR
$5.9B
| $265K | ﹤0.01% |
21,061
-139,117
|
|
||
993
iShares MSCI Mexico ETF
EWW
$2.03B
| $265K | ﹤0.01% |
+3,898
|
|
||
994
Absci
ABSI
$397M
| $264K | ﹤0.01% |
87,162
-57,361
|
|
||
995
JELD-WEN Holding
JELD
$182M
| $264K | ﹤0.01% |
53,817
+51,241
|
|
||
996
Natera
NTRA
$27.7B
| $263K | ﹤0.01% |
+1,638
|
|
||
997
Toro Company
TTC
$7.01B
| $263K | ﹤0.01% |
3,460
+3,243
|
|
||
998
SFL Corp
SFL
$1.18B
| $261K | ﹤0.01% |
+34,720
|
|
||
999
AptarGroup
ATR
$7.89B
| $258K | ﹤0.01% |
1,934
+847
|
|
||
1000
BTCS Inc
BTCS
$129M
| $258K | ﹤0.01% |
+53,427
|
|