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 |
Amazon
AMZN
|
+$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$57.4M |
| 4 |
Citigroup
C
|
+$23.4M |
| 5 |
Goldman Sachs
GS
|
+$23M |
Top Sells
| 1 |
Apple
AAPL
|
+$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$42.2M |
| 4 |
Micron Technology
MU
|
+$26.1M |
| 5 |
Adobe
ADBE
|
+$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MLNX
601
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $327K | ﹤0.01% |
4,457
-14,528
| -77% | -$1.07M |
|
602
Textron
TXT
$14.4B
| $326K | ﹤0.01% |
4,572
+3,044
| +199% | +$217K |
|
603
Affiliated Managers Group
AMG
$6.6B
| $325K | ﹤0.01% |
2,380
+88
| +4% | +$12K |
|
|
MDSO
604
DELISTED
Medidata Solutions, Inc.
MDSO
| $324K | ﹤0.01% |
+4,425
| New | +$324K |
|
605
Mercado Libre
MELI
$119B
| $323K | ﹤0.01% |
951
-4,072
| -81% | -$1.38M |
|
606
SPDR Euro Stoxx 50 ETF
FEZ
$4.54B
| $322K | ﹤0.01% |
+8,433
| New | +$322K |
|
|
DM
607
DELISTED
Dominion Energy Midstream Ptr LP
DM
| $321K | ﹤0.01% |
17,962
+6,670
| +59% | +$119K |
|
608
MBIA
MBI
$374M
| $320K | ﹤0.01% |
29,986
-14,557
| -33% | -$155K |
|
609
Mohawk Industries
MHK
$8.41B
| $320K | ﹤0.01% |
1,827
-7,908
| -81% | -$1.39M |
|
|
MBFI
610
DELISTED
MB Financial Corp
MBFI
| $320K | ﹤0.01% |
6,952
+362
| +5% | +$16.7K |
|
611
Galicia Financial Group
GGAL
$5.15B
| $319K | ﹤0.01% |
12,563
+4,890
| +64% | +$124K |
|
612
Towne Bank
TOWN
$2.84B
| $319K | ﹤0.01% |
+10,370
| New | +$319K |
|
613
BJs Wholesale Club
BJ
$12.8B
| $318K | ﹤0.01% |
+11,908
| New | +$318K |
|
614
Baytex Energy
BTE
$1.83B
| $318K | ﹤0.01% |
109,334
+104,336
| +2,088% | +$303K |
|
615
iRobot
IRBT
$107M
| $318K | ﹤0.01% |
+2,898
| New | +$318K |
|
616
NETSCOUT
NTCT
$1.8B
| $318K | ﹤0.01% |
12,599
+3,904
| +45% | +$98.5K |
|
|
REN
617
DELISTED
Resolute Energy Corporaton
REN
| $313K | ﹤0.01% |
+8,281
| New | +$313K |
|
618
Cheniere Energy
LNG
$52.1B
| $312K | ﹤0.01% |
4,498
+2,042
| +83% | +$142K |
|
619
Tronox
TROX
$755M
| $312K | ﹤0.01% |
26,174
+9,067
| +53% | +$108K |
|
|
AEL
620
DELISTED
American Equity Investment Life Holding Company
AEL
| $311K | ﹤0.01% |
8,813
+8,291
| +1,588% | +$293K |
|
621
JB Hunt Transport Services
JBHT
$13.3B
| $310K | ﹤0.01% |
+2,608
| New | +$310K |
|
622
Corpay
CPAY
$21.5B
| $310K | ﹤0.01% |
+1,362
| New | +$310K |
|
623
1-800-Flowers.com
FLWS
$326M
| $308K | ﹤0.01% |
+26,114
| New | +$308K |
|
624
Popular Inc
BPOP
$8.45B
| $307K | ﹤0.01% |
+6,001
| New | +$307K |
|
625
Puma Biotechnology
PBYI
$229M
| $304K | ﹤0.01% |
6,632
-11,997
| -64% | -$550K |
|