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 | |
|---|---|---|---|---|---|---|
426
Hewlett Packard
HPE
$31B
| $566K | ﹤0.01% |
+38,761
| New | +$566K |
|
427
Caesarstone
CSTE
$48.7M
| $561K | ﹤0.01% |
37,179
+28,186
| +313% | +$425K |
|
|
SIVB
428
DELISTED
SVB Financial Group
SIVB
| $561K | ﹤0.01% |
1,945
-1,361
| -41% | -$393K |
|
429
Nabors Industries
NBR
$560M
| $556K | ﹤0.01% |
1,736
+955
| +122% | +$306K |
|
430
EQT Corp
EQT
$32.2B
| $552K | ﹤0.01% |
18,388
+125
| +0.7% | +$3.75K |
|
|
DISH
431
DELISTED
DISH Network Corp.
DISH
| $552K | ﹤0.01% |
16,426
-6,949
| -30% | -$234K |
|
432
Dave & Buster's
PLAY
$820M
| $550K | ﹤0.01% |
+11,572
| New | +$550K |
|
|
PE
433
DELISTED
PARSLEY ENERGY INC
PE
| $550K | ﹤0.01% |
+18,183
| New | +$550K |
|
|
WPZ
434
DELISTED
Williams Partners L.P.
WPZ
| $546K | ﹤0.01% |
13,454
-8,153
| -38% | -$331K |
|
435
Brunswick
BC
$4.35B
| $545K | ﹤0.01% |
8,464
-2,356
| -22% | -$152K |
|
436
Cullen/Frost Bankers
CFR
$8.24B
| $544K | ﹤0.01% |
+5,028
| New | +$544K |
|
437
Knight Transportation
KNX
$7B
| $540K | ﹤0.01% |
14,141
-136
| -1% | -$5.19K |
|
438
Vanguard FTSE Europe ETF
VGK
$26.9B
| $540K | ﹤0.01% |
+9,633
| New | +$540K |
|
439
Humana
HUM
$37B
| $538K | ﹤0.01% |
+1,808
| New | +$538K |
|
440
Crown Holdings
CCK
$11B
| $534K | ﹤0.01% |
11,948
+3,772
| +46% | +$169K |
|
|
PX
441
DELISTED
Praxair Inc
PX
| $534K | ﹤0.01% |
+3,377
| New | +$534K |
|
|
FNSR
442
DELISTED
Finisar Corp
FNSR
| $534K | ﹤0.01% |
+29,675
| New | +$534K |
|
|
BPL
443
DELISTED
Buckeye Partners, L.P.
BPL
| $531K | ﹤0.01% |
15,120
-7,972
| -35% | -$280K |
|
444
Essential Utilities
WTRG
$11B
| $530K | ﹤0.01% |
15,076
+1,884
| +14% | +$66.2K |
|
|
PRSP
445
DELISTED
Perspecta Inc. Common Stock
PRSP
| $529K | ﹤0.01% |
+25,750
| New | +$529K |
|
|
HTZ
446
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $526K | ﹤0.01% |
+39,503
| New | +$526K |
|
|
BRSL
447
Brightstar Lottery PLC
BRSL
$3.18B
| $525K | ﹤0.01% |
22,595
+3,519
| +18% | +$81.8K |
|
448
Guess, Inc.
GES
$878M
| $520K | ﹤0.01% |
24,306
+1,601
| +7% | +$34.3K |
|
|
ICPT
449
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $520K | ﹤0.01% |
6,203
-1,728
| -22% | -$145K |
|
|
AERI
450
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $519K | ﹤0.01% |
7,696
+5,924
| +334% | +$400K |
|