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 | |
|---|---|---|---|---|---|---|
251
Children's Place
PLCE
$121M
| $1.22M | ﹤0.01% |
10,076
+4,941
| +96% | +$597K |
|
252
LiveRamp
RAMP
$1.86B
| $1.2M | ﹤0.01% |
40,085
+28,448
| +244% | +$852K |
|
|
EVHC
253
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $1.2M | ﹤0.01% |
27,235
-5,994
| -18% | -$264K |
|
254
Rio Tinto
RIO
$104B
| $1.19M | ﹤0.01% |
21,417
-3,594
| -14% | -$199K |
|
255
Insperity
NSP
$2.03B
| $1.18M | ﹤0.01% |
12,428
+8,051
| +184% | +$766K |
|
|
GRA
256
DELISTED
W.R. Grace & Co.
GRA
| $1.18M | ﹤0.01% |
16,125
+12,112
| +302% | +$888K |
|
257
Cheesecake Factory
CAKE
$3.02B
| $1.18M | ﹤0.01% |
21,379
+20,974
| +5,179% | +$1.15M |
|
|
CS
258
DELISTED
Credit Suisse Group
CS
| $1.16M | ﹤0.01% |
+78,195
| New | +$1.16M |
|
|
AKRX
259
DELISTED
Akorn, Inc.
AKRX
| $1.16M | ﹤0.01% |
70,104
+51,999
| +287% | +$863K |
|
|
LSI
260
DELISTED
Life Storage, Inc.
LSI
| $1.15M | ﹤0.01% |
17,799
-17,114
| -49% | -$1.11M |
|
261
Harley-Davidson
HOG
$3.67B
| $1.15M | ﹤0.01% |
+27,398
| New | +$1.15M |
|
|
SRG
262
Seritage Growth Properties
SRG
$211M
| $1.15M | ﹤0.01% |
27,093
+23,181
| +593% | +$983K |
|
|
ULTI
263
DELISTED
Ultimate Software Group Inc
ULTI
| $1.15M | ﹤0.01% |
+4,462
| New | +$1.15M |
|
264
Citizens Financial Group
CFG
$22.3B
| $1.15M | ﹤0.01% |
29,464
+29,064
| +7,266% | +$1.13M |
|
265
Trade Desk
TTD
$25.5B
| $1.14M | ﹤0.01% |
122,050
+107,490
| +738% | +$1.01M |
|
266
EPAM Systems
EPAM
$9.44B
| $1.13M | ﹤0.01% |
9,115
+6,341
| +229% | +$788K |
|
267
Simon Property Group
SPG
$59.5B
| $1.13M | ﹤0.01% |
6,641
-2,167
| -25% | -$369K |
|
268
Citigroup
C
$176B
| $1.12M | ﹤0.01% |
+16,739
| New | +$1.12M |
|
269
Puma Biotechnology
PBYI
$253M
| $1.1M | ﹤0.01% |
+18,629
| New | +$1.1M |
|
270
Novo Nordisk
NVO
$245B
| $1.1M | ﹤0.01% |
47,664
+26,958
| +130% | +$622K |
|
271
BGC Group
BGC
$4.71B
| $1.08M | ﹤0.01% |
148,918
+107,518
| +260% | +$783K |
|
272
ProShares Short 20+ Year Treasury ETF
TBF
$70.1M
| $1.08M | ﹤0.01% |
47,660
+29,338
| +160% | +$664K |
|
273
First Trust Dow Jones Internet Index Fund ETF
FDN
$7.31B
| $1.07M | ﹤0.01% |
7,755
+1,026
| +15% | +$141K |
|
274
Stryker
SYK
$150B
| $1.07M | ﹤0.01% |
+6,319
| New | +$1.07M |
|
|
USCR
275
DELISTED
U S Concrete, Inc.
USCR
| $1.06M | ﹤0.01% |
20,282
-753
| -4% | -$39.5K |
|