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
|
$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$38.8M |
| 4 |
Amazon
AMZN
|
$38.6M |
| 5 |
Tesla
TSLA
|
$36M |
Top Sells
| 1 |
Alibaba
BABA
|
$46.4M |
| 2 |
Boeing
BA
|
$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
NVIDIA
NVDA
|
$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
251
Dollar General
DG
$24.1B
| $1.12M | ﹤0.01% |
7,212
-363
| -5% | -$56.6K |
|
252
Verint Systems
VRNT
$1.23B
| $1.12M | ﹤0.01% |
+39,719
| New | +$1.12M |
|
253
Ralph Lauren
RL
$18.9B
| $1.12M | ﹤0.01% |
9,550
-5,693
| -37% | -$667K |
|
254
Extreme Networks
EXTR
$2.87B
| $1.12M | ﹤0.01% |
+151,380
| New | +$1.12M |
|
|
FLXN
255
DELISTED
Flexion Therapeutics, Inc.
FLXN
| $1.11M | ﹤0.01% |
53,745
+48,176
| +865% | +$997K |
|
256
Check Point Software Technologies
CHKP
$20.7B
| $1.11M | ﹤0.01% |
10,007
-2,821
| -22% | -$313K |
|
|
ATCO
257
DELISTED
Atlas Corp.
ATCO
| $1.11M | ﹤0.01% |
78,003
+71,909
| +1,180% | +$1.02M |
|
258
J.M. Smucker
SJM
$12B
| $1.1M | ﹤0.01% |
10,558
+7,334
| +227% | +$763K |
|
259
Target
TGT
$42.3B
| $1.1M | ﹤0.01% |
8,567
-9,117
| -52% | -$1.17M |
|
260
Carlyle Group
CG
$23.1B
| $1.1M | ﹤0.01% |
+34,204
| New | +$1.1M |
|
261
Deere & Co
DE
$128B
| $1.09M | ﹤0.01% |
6,316
-19,181
| -75% | -$3.32M |
|
262
Innoviva
INVA
$1.29B
| $1.09M | ﹤0.01% |
+77,323
| New | +$1.09M |
|
263
SPDR S&P Homebuilders ETF
XHB
$2.01B
| $1.09M | ﹤0.01% |
+23,886
| New | +$1.09M |
|
264
Bilibili
BILI
$9.25B
| $1.09M | ﹤0.01% |
58,287
+27,247
| +88% | +$507K |
|
265
WEC Energy
WEC
$34.7B
| $1.08M | ﹤0.01% |
11,752
-24,428
| -68% | -$2.25M |
|
266
Madison Square Garden
MSGS
$4.71B
| $1.07M | ﹤0.01% |
5,114
+2,774
| +119% | +$582K |
|
267
Brinker International
EAT
$7.04B
| $1.07M | ﹤0.01% |
25,424
+10,280
| +68% | +$431K |
|
268
Fastly
FSLY
$1.1B
| $1.06M | ﹤0.01% |
53,040
+40,444
| +321% | +$811K |
|
|
AIMT
269
DELISTED
Aimmune Therapeutics, Inc.
AIMT
| $1.06M | ﹤0.01% |
31,762
+15,030
| +90% | +$503K |
|
270
Merit Medical Systems
MMSI
$5.51B
| $1.05M | ﹤0.01% |
+33,571
| New | +$1.05M |
|
|
SINA
271
DELISTED
Sina Corp
SINA
| $1.05M | ﹤0.01% |
26,259
+23,449
| +834% | +$936K |
|
272
Envista
NVST
$3.54B
| $1.05M | ﹤0.01% |
+35,351
| New | +$1.05M |
|
273
TEGNA Inc
TGNA
$3.38B
| $1.04M | ﹤0.01% |
+62,452
| New | +$1.04M |
|
|
CS
274
DELISTED
Credit Suisse Group
CS
| $1.04M | ﹤0.01% |
76,998
-53,844
| -41% | -$724K |
|
275
Wells Fargo
WFC
$253B
| $1.03M | ﹤0.01% |
+19,146
| New | +$1.03M |
|