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 | |
|---|---|---|---|---|---|---|
|
AET
201
DELISTED
Aetna Inc
AET
| $1.48M | 0.01% |
8,051
-10,547
| -57% | -$1.93M |
|
202
Technology Select Sector SPDR Fund
XLK
$83.7B
| $1.48M | 0.01% |
21,246
-68,511
| -76% | -$4.76M |
|
203
Heron Therapeutics
HRTX
$199M
| $1.47M | 0.01% |
37,950
+30,041
| +380% | +$1.17M |
|
|
GAP
204
The Gap, Inc.
GAP
$8.9B
| $1.47M | 0.01% |
45,314
+29,010
| +178% | +$939K |
|
205
Schlumberger
SLB
$53.5B
| $1.46M | 0.01% |
21,845
-146,478
| -87% | -$9.82M |
|
|
IMMU
206
DELISTED
Immunomedics Inc
IMMU
| $1.46M | 0.01% |
61,734
-10,413
| -14% | -$246K |
|
|
I
207
DELISTED
INTELSAT S. A.
I
| $1.44M | 0.01% |
86,170
+59,009
| +217% | +$983K |
|
|
BBBY
208
Bed Bath & Beyond, Inc.
BBBY
$527M
| $1.41M | 0.01% |
+50,807
| New | +$1.41M |
|
|
SC
209
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $1.41M | 0.01% |
73,758
-60,820
| -45% | -$1.16M |
|
|
GWPH
210
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $1.39M | 0.01% |
+9,965
| New | +$1.39M |
|
|
EGN
211
DELISTED
Energen
EGN
| $1.39M | 0.01% |
19,035
+15,347
| +416% | +$1.12M |
|
212
Brighthouse Financial
BHF
$2.5B
| $1.39M | 0.01% |
34,567
+25,987
| +303% | +$1.04M |
|
213
Williams-Sonoma
WSM
$24.5B
| $1.39M | 0.01% |
+45,148
| New | +$1.39M |
|
214
SolarEdge
SEDG
$2.03B
| $1.38M | 0.01% |
28,839
+2,692
| +10% | +$129K |
|
|
XLNX
215
DELISTED
Xilinx Inc
XLNX
| $1.38M | 0.01% |
21,143
+19,326
| +1,064% | +$1.26M |
|
216
iQIYI
IQ
$2.61B
| $1.37M | 0.01% |
+42,539
| New | +$1.37M |
|
|
VIAB
217
DELISTED
Viacom Inc. Class B
VIAB
| $1.37M | 0.01% |
45,557
+19,654
| +76% | +$592K |
|
218
Wingstop
WING
$8.62B
| $1.36M | 0.01% |
26,168
+12,727
| +95% | +$663K |
|
219
Akamai
AKAM
$11.2B
| $1.36M | 0.01% |
+18,588
| New | +$1.36M |
|
220
Carvana
CVNA
$49.9B
| $1.36M | 0.01% |
32,696
+14,177
| +77% | +$590K |
|
221
Match Group
MTCH
$9.04B
| $1.34M | 0.01% |
34,673
+26,266
| +312% | +$1.02M |
|
222
Factset
FDS
$14B
| $1.34M | 0.01% |
+6,777
| New | +$1.34M |
|
223
Qorvo
QRVO
$8.64B
| $1.34M | 0.01% |
+16,736
| New | +$1.34M |
|
224
ResMed
RMD
$40.4B
| $1.34M | 0.01% |
12,911
+8,515
| +194% | +$882K |
|
|
SLCA
225
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $1.33M | 0.01% |
+51,595
| New | +$1.33M |
|