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 | |
|---|---|---|---|---|---|---|
76
ServiceNow
NOW
$191B
| $3.76M | 0.01% |
21,786
+12,940
| +146% | +$2.23M |
|
77
Trip.com Group
TCOM
$46.6B
| $3.75M | 0.01% |
78,729
+17,187
| +28% | +$818K |
|
78
United Airlines
UAL
$34.4B
| $3.72M | 0.01% |
53,326
+31,798
| +148% | +$2.22M |
|
79
Ulta Beauty
ULTA
$23.8B
| $3.65M | 0.01% |
+15,617
| New | +$3.65M |
|
80
NXP Semiconductors
NXPI
$57.5B
| $3.64M | 0.01% |
33,276
+28,081
| +541% | +$3.07M |
|
|
BLUE
81
DELISTED
bluebird bio
BLUE
| $3.61M | 0.01% |
23,011
+22,911
| +22,911% | +$3.59M |
|
82
US Bancorp
USB
$75.5B
| $3.6M | 0.01% |
72,017
+67,434
| +1,471% | +$3.37M |
|
|
AABA
83
DELISTED
Altaba Inc. Common Stock
AABA
| $3.57M | 0.01% |
48,832
-16,223
| -25% | -$1.19M |
|
84
Gilead Sciences
GILD
$140B
| $3.47M | 0.01% |
+49,006
| New | +$3.47M |
|
85
VF Corp
VFC
$5.79B
| $3.44M | 0.01% |
+42,157
| New | +$3.44M |
|
86
SPDR S&P Biotech ETF
XBI
$5.29B
| $3.37M | 0.01% |
+35,406
| New | +$3.37M |
|
|
RHT
87
DELISTED
Red Hat Inc
RHT
| $3.35M | 0.01% |
24,917
+11,086
| +80% | +$1.49M |
|
88
iShares MSCI South Korea ETF
EWY
$5.17B
| $3.34M | 0.01% |
+49,378
| New | +$3.34M |
|
89
Cigna
CI
$80.2B
| $3.3M | 0.01% |
19,404
+6,431
| +50% | +$1.09M |
|
|
RTN
90
DELISTED
Raytheon Company
RTN
| $3.18M | 0.01% |
16,485
-14,229
| -46% | -$2.75M |
|
|
ESRX
91
DELISTED
Express Scripts Holding Company
ESRX
| $3.1M | 0.01% |
40,142
-57,154
| -59% | -$4.41M |
|
92
ProShares Ultra S&P500
SSO
$7.13B
| $3.1M | 0.01% |
27,822
+16,994
| +157% | +$1.89M |
|
|
NBIS
93
Nebius Group N.V. Class A Ordinary Shares
NBIS
$15.7B
| $3.08M | 0.01% |
85,843
+52,402
| +157% | +$1.88M |
|
94
Petrobras
PBR
$79.3B
| $3.06M | 0.01% |
+304,797
| New | +$3.06M |
|
95
ProShares UltraPro QQQ
TQQQ
$26B
| $3.04M | 0.01% |
53,296
+12,734
| +31% | -$3.9M |
|
96
Spotify
SPOT
$143B
| $3.02M | 0.01% |
+17,958
| New | +$3.02M |
|
|
ALXN
97
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $3M | 0.01% |
24,187
-25,804
| -52% | -$3.2M |
|
|
AGN
98
DELISTED
Allergan plc
AGN
| $2.87M | 0.01% |
+17,195
| New | +$2.87M |
|
99
Johnson & Johnson
JNJ
$429B
| $2.86M | 0.01% |
23,581
-27,361
| -54% | -$3.32M |
|
100
Twilio
TWLO
$16.1B
| $2.84M | 0.01% |
50,692
+6,852
| +16% | +$384K |
|