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 |
Apple
AAPL
|
+$35.2M |
| 2 |
Micron Technology
MU
|
+$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$29.5M |
| 4 |
NVIDIA
NVDA
|
+$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$33.4M |
| 3 |
Tesla
TSLA
|
+$19.8M |
| 4 |
Netflix
NFLX
|
+$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
+$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1026
Ecopetrol
EC
$19.3B
| $97K | ﹤0.01% |
4,725
-25,133
| -84% | -$516K |
|
1027
Esperion Therapeutics
ESPR
$518M
| $97K | ﹤0.01% |
2,498
+1,336
| +115% | +$51.9K |
|
1028
Monarch Casino & Resort
MCRI
$1.86B
| $97K | ﹤0.01% |
+2,219
| New | +$97K |
|
1029
Willis Towers Watson
WTW
$32.2B
| $97K | ﹤0.01% |
641
+360
| +128% | +$54.5K |
|
|
BCOV
1030
DELISTED
Brightcove, Inc.
BCOV
| $97K | ﹤0.01% |
10,082
+4,259
| +73% | +$41K |
|
1031
Banco Macro
BMA
$3.03B
| $96K | ﹤0.01% |
1,634
-10,412
| -86% | -$612K |
|
1032
Energy Transfer Partners
ET
$59.7B
| $96K | ﹤0.01% |
5,605
-55,774
| -91% | -$955K |
|
1033
Owens Corning
OC
$12.8B
| $96K | ﹤0.01% |
+1,516
| New | +$96K |
|
1034
Rogers Corp
ROG
$1.43B
| $96K | ﹤0.01% |
+870
| New | +$96K |
|
|
AT
1035
DELISTED
Atlantic Power Corporation
AT
| $96K | ﹤0.01% |
43,962
+33,097
| +305% | +$72.3K |
|
1036
AGNC Investment
AGNC
$10.7B
| $95K | ﹤0.01% |
+5,147
| New | +$95K |
|
1037
CommScope
COMM
$3.6B
| $95K | ﹤0.01% |
+3,253
| New | +$95K |
|
1038
Diana Shipping
DSX
$213M
| $95K | ﹤0.01% |
28,366
+27,268
| +2,483% | +$91.3K |
|
|
VNET
1039
VNET Group
VNET
$2.13B
| $95K | ﹤0.01% |
9,873
-1,702
| -15% | -$16.4K |
|
|
AMRS
1040
DELISTED
Amyris Inc.
AMRS
| $95K | ﹤0.01% |
+14,922
| New | +$95K |
|
1041
Odyssey Marine Exploration
OMEX
$74.6M
| $94K | ﹤0.01% |
11,438
+6,883
| +151% | +$56.6K |
|
1042
Star Bulk Carriers
SBLK
$2.23B
| $94K | ﹤0.01% |
7,338
+87
| +1% | +$1.11K |
|
1043
Universal Corp
UVV
$1.38B
| $94K | ﹤0.01% |
+1,430
| New | +$94K |
|
1044
Home BancShares
HOMB
$5.8B
| $93K | ﹤0.01% |
+4,139
| New | +$93K |
|
1045
Rambus
RMBS
$8.29B
| $93K | ﹤0.01% |
+7,445
| New | +$93K |
|
1046
RenaissanceRe
RNR
$11.2B
| $93K | ﹤0.01% |
+774
| New | +$93K |
|
|
PAY
1047
DELISTED
Verifone Systems Inc
PAY
| $93K | ﹤0.01% |
4,100
-20,705
| -83% | -$470K |
|
1048
St. Joe Company
JOE
$2.91B
| $92K | ﹤0.01% |
5,147
-26,632
| -84% | -$476K |
|
1049
MEI Pharma
MEIP
$99.2M
| $92K | ﹤0.01% |
+1,168
| New | +$92K |
|
|
RDS.B
1050
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $92K | ﹤0.01% |
+1,267
| New | +$92K |
|