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 | +$234M | |
| 2 | +$97.5M | |
| 3 | +$96.8M | |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| 1 | +$129M | |
| 2 | +$92.9M | |
| 3 | +$82.9M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| 1 | Technology | 34.08% |
| 2 | Consumer Discretionary | 12.8% |
| 3 | Healthcare | 10.63% |
| 4 | Financials | 7.25% |
| 5 | Industrials | 3.96% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
976
Qfin Holdings
QFIN
$1.59B
| $280K | 0.01% |
9,762
+3,781
|
|
||
977
Wheels Up
UP
$302M
| $280K | 0.01% |
152,479
+149,478
|
|
||
978
HNI Corp
HNI
$2.71B
| $279K | 0.01% |
5,972
+5,792
|
|
||
979
VanEck Vietnam ETF
VNM
$559M
| $279K | 0.01% |
+15,690
|
|
||
|
TGEN
980
Tecogen Inc
TGEN
$128M
| $278K | 0.01% |
+31,562
|
|
||
981
Designer Brands
DBI
$411M
| $274K | 0.01% |
77,624
-10,897
|
|
||
982
Domo
DOMO
$176M
| $274K | 0.01% |
17,298
-100,340
|
|
||
983
LifeMD
LFMD
$220M
| $274K | 0.01% |
40,379
-58,505
|
|
||
984
Akebia Therapeutics
AKBA
$383M
| $273K | 0.01% |
100,103
-92,931
|
|
||
985
Virtu Financial
VIRT
$4.2B
| $273K | 0.01% |
+7,694
|
|
||
986
Krispy Kreme
DNUT
$677M
| $272K | 0.01% |
70,448
+25,467
|
|
||
987
Seadrill
SDRL
$3B
| $271K | 0.01% |
8,977
-2,692
|
|
||
988
Iridium Communications
IRDM
$4.12B
| $270K | 0.01% |
+15,516
|
|
||
989
Open Text
OTEX
$5.62B
| $270K | 0.01% |
+7,242
|
|
||
990
Denison Mines
DNN
$3.44B
| $269K | 0.01% |
+97,984
|
|
||
991
Howard Hughes
HHH
$3.82B
| $267K | 0.01% |
3,256
-12,063
|
|
||
992
Cipher Digital Inc
CIFR
$7.39B
| $265K | 0.01% |
21,061
-139,117
|
|
||
993
iShares MSCI Mexico ETF
EWW
$2.27B
| $265K | 0.01% |
+3,898
|
|
||
994
Absci
ABSI
$603M
| $264K | 0.01% |
87,162
-57,361
|
|
||
995
JELD-WEN Holding
JELD
$126M
| $264K | 0.01% |
53,817
+51,241
|
|
||
996
Natera
NTRA
$28.9B
| $263K | 0.01% |
+1,638
|
|
||
997
Toro Company
TTC
$9.23B
| $263K | 0.01% |
3,460
+3,243
|
|
||
998
SFL Corp
SFL
$1.45B
| $261K | 0.01% |
+34,720
|
|
||
999
AptarGroup
ATR
$7.91B
| $258K | 0.01% |
1,934
+847
|
|
||
1000
BTCS Inc
BTCS
$93.6M
| $258K | 0.01% |
+53,427
|
|