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 | |
|---|---|---|---|---|---|---|
1926
FormFactor
FORM
$2.32B
| $1K | ﹤0.01% |
91
-9,877
| -99% | -$109K |
|
1927
Forward Air
FWRD
$904M
| $1K | ﹤0.01% |
+17
| New | +$1K |
|
1928
GigaMedia
GIGM
$19.9M
| $1K | ﹤0.01% |
+448
| New | +$1K |
|
1929
Genasys
GNSS
$99.3M
| $1K | ﹤0.01% |
426
+217
| +104% | +$509 |
|
1930
Installed Building Products
IBP
$7.27B
| $1K | ﹤0.01% |
22
-468
| -96% | -$21.3K |
|
|
JKS
1931
JinkoSolar
JKS
$1.3B
| $1K | ﹤0.01% |
80
-53,961
| -100% | -$675K |
|
1932
Korn Ferry
KFY
$3.79B
| $1K | ﹤0.01% |
22
-1,706
| -99% | -$77.5K |
|
1933
LeMaitre Vascular
LMAT
$2.09B
| $1K | ﹤0.01% |
+49
| New | +$1K |
|
1934
Lantheus
LNTH
$3.6B
| $1K | ﹤0.01% |
120
-979
| -89% | -$8.16K |
|
1935
LXP Industrial Trust
LXP
$2.72B
| $1K | ﹤0.01% |
+196
| New | +$1K |
|
1936
Lexicon Pharmaceuticals
LXRX
$418M
| $1K | ﹤0.01% |
109
-25
| -19% | -$229 |
|
1937
Marchex
MCHX
$86.6M
| $1K | ﹤0.01% |
333
-458
| -58% | -$1.38K |
|
1938
Monolithic Power Systems
MPWR
$39.9B
| $1K | ﹤0.01% |
9
-368
| -98% | -$40.9K |
|
1939
Minerva Neurosciences
NERV
$15.2M
| $1K | ﹤0.01% |
+27
| New | +$1K |
|
1940
Nova
NVMI
$8.69B
| $1K | ﹤0.01% |
+53
| New | +$1K |
|
1941
Northwest Bancshares
NWBI
$1.83B
| $1K | ﹤0.01% |
+73
| New | +$1K |
|
1942
Old National Bancorp
ONB
$8.88B
| $1K | ﹤0.01% |
76
-102
| -57% | -$1.34K |
|
1943
SCYNEXIS
SCYX
$47M
| $1K | ﹤0.01% |
+96
| New | +$1K |
|
1944
TIM SA
TIMB
$10.3B
| $1K | ﹤0.01% |
71
-657
| -90% | -$9.25K |
|
1945
Trupanion
TRUP
$1.87B
| $1K | ﹤0.01% |
32
-3,642
| -99% | -$114K |
|
1946
TTM Technologies
TTMI
$4.83B
| $1K | ﹤0.01% |
+94
| New | +$1K |
|
1947
Telus
TU
$24.3B
| $1K | ﹤0.01% |
+66
| New | +$1K |
|
1948
Direxion Daily 7-10 Year Treasury Bull 3X Shares
TYD
$51.6M
| $1K | ﹤0.01% |
+43
| New | +$1K |
|
1949
Veru
VERU
$50.5M
| $1K | ﹤0.01% |
57
-482
| -89% | -$8.46K |
|
1950
W.P. Carey
WPC
$15B
| $1K | ﹤0.01% |
+22
| New | +$1K |
|