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 | |
|---|---|---|---|---|---|---|
326
Dycom Industries
DY
$7.19B
| $836K | ﹤0.01% |
8,854
+4,529
| +105% | +$428K |
|
327
Varonis Systems
VRNS
$6.28B
| $833K | ﹤0.01% |
33,561
-5,802
| -15% | -$144K |
|
|
XOG
328
DELISTED
Extraction Oil & Gas, Inc. Common Stock
XOG
| $829K | ﹤0.01% |
+56,476
| New | +$829K |
|
|
JO
329
DELISTED
iPath Series B Bloomberg Coffee Subindex Total ReturnSM ETN
JO
| $828K | ﹤0.01% |
18,646
+7,280
| +64% | +$323K |
|
|
HOME
330
DELISTED
At Home Group Inc.
HOME
| $825K | ﹤0.01% |
21,077
-7,686
| -27% | -$301K |
|
331
Mattel
MAT
$6.06B
| $823K | ﹤0.01% |
50,164
+13,854
| +38% | +$227K |
|
332
Evercore
EVR
$12.3B
| $820K | ﹤0.01% |
7,779
+4,022
| +107% | +$424K |
|
333
Arrowhead Research
ARWR
$4.02B
| $818K | ﹤0.01% |
60,189
+49,576
| +467% | +$674K |
|
334
MSCI
MSCI
$42.9B
| $800K | ﹤0.01% |
4,839
+3,128
| +183% | +$517K |
|
335
Vipshop
VIPS
$8.45B
| $798K | ﹤0.01% |
+73,559
| New | +$798K |
|
|
LL
336
DELISTED
LL Flooring Holdings, Inc.
LL
| $795K | ﹤0.01% |
+32,664
| New | +$795K |
|
337
Zillow
Z
$21.3B
| $792K | ﹤0.01% |
13,425
+4,965
| +59% | +$293K |
|
338
Goodyear
GT
$2.43B
| $790K | ﹤0.01% |
33,933
-7,295
| -18% | -$170K |
|
339
Lumentum
LITE
$10.4B
| $789K | ﹤0.01% |
+13,640
| New | +$789K |
|
|
APTI
340
DELISTED
Apptio, Inc. Class A Common Stock
APTI
| $788K | ﹤0.01% |
+21,777
| New | +$788K |
|
341
Direxion Daily MSCI Brazil Bull 2X Shares
BRZU
$133M
| $781K | ﹤0.01% |
1,255
+1,227
| +4,382% | +$764K |
|
|
ENV
342
DELISTED
ENVESTNET, INC.
ENV
| $778K | ﹤0.01% |
+14,171
| New | +$778K |
|
343
Axalta
AXTA
$6.89B
| $777K | ﹤0.01% |
25,655
-787
| -3% | -$23.8K |
|
344
TechTarget
TTGT
$403M
| $775K | ﹤0.01% |
27,320
+25,077
| +1,118% | +$711K |
|
|
ORBK
345
DELISTED
Orbotech Ltd
ORBK
| $771K | ﹤0.01% |
12,484
-21,822
| -64% | -$1.35M |
|
|
UFS
346
DELISTED
DOMTAR CORPORATION (New)
UFS
| $766K | ﹤0.01% |
+16,049
| New | +$766K |
|
347
Hyatt Hotels
H
$13.8B
| $762K | ﹤0.01% |
9,887
+8,445
| +586% | +$651K |
|
348
MPLX
MPLX
$51.5B
| $760K | ﹤0.01% |
22,264
+12,483
| +128% | +$426K |
|
|
LOGM
349
DELISTED
LogMein, Inc.
LOGM
| $756K | ﹤0.01% |
7,331
+7,226
| +6,882% | +$745K |
|
350
Atlassian
TEAM
$45.2B
| $753K | ﹤0.01% |
12,057
-2,928
| -20% | -$183K |
|