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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
SFS
1026
DELISTED
Smart & Final Stores, Inc.
SFS
| $58K | ﹤0.01% |
+12,310
| New | +$58K |
|
1027
VanEck ChiNext ETF
CNXT
$39.6M
| $57K | ﹤0.01% |
+2,734
| New | +$57K |
|
1028
Qualys
QLYS
$4.9B
| $57K | ﹤0.01% |
+768
| New | +$57K |
|
1029
Simply Good Foods
SMPL
$2.78B
| $57K | ﹤0.01% |
3,025
-2,106
| -41% | -$39.7K |
|
1030
Alamos Gold
AGI
$13.8B
| $56K | ﹤0.01% |
15,657
+10,684
| +215% | +$38.2K |
|
|
CMRX
1031
DELISTED
Chimerix, Inc.
CMRX
| $56K | ﹤0.01% |
+22,041
| New | +$56K |
|
1032
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.48B
| $55K | ﹤0.01% |
826
+789
| +2,132% | +$52.5K |
|
1033
FNB Corp
FNB
$5.9B
| $55K | ﹤0.01% |
+5,637
| New | +$55K |
|
1034
iShares Core MSCI Emerging Markets ETF
IEMG
$106B
| $55K | ﹤0.01% |
+1,181
| New | +$55K |
|
1035
LyondellBasell Industries
LYB
$17.8B
| $55K | ﹤0.01% |
664
-17,754
| -96% | -$1.47M |
|
1036
Qiagen
QGEN
$9.99B
| $55K | ﹤0.01% |
1,525
+1,431
| +1,522% | +$51.6K |
|
1037
Varonis Systems
VRNS
$6.41B
| $55K | ﹤0.01% |
+3,138
| New | +$55K |
|
|
CBMG
1038
DELISTED
Cellular Biomedicine Group, Inc.
CBMG
| $55K | ﹤0.01% |
3,125
+2,712
| +657% | +$47.7K |
|
1039
Vanguard Total Bond Market
BND
$135B
| $54K | ﹤0.01% |
685
-2,482
| -78% | -$196K |
|
1040
Landstar System
LSTR
$4.59B
| $54K | ﹤0.01% |
+567
| New | +$54K |
|
1041
Ternium
TX
$6.87B
| $54K | ﹤0.01% |
+2,006
| New | +$54K |
|
1042
Vanguard Value ETF
VTV
$146B
| $54K | ﹤0.01% |
+555
| New | +$54K |
|
|
NTRI
1043
DELISTED
NutriSystem, Inc.
NTRI
| $54K | ﹤0.01% |
+1,232
| New | +$54K |
|
1044
Adeia
ADEA
$1.71B
| $53K | ﹤0.01% |
10,913
+6,630
| +155% | +$32.2K |
|
1045
Caterpillar
CAT
$202B
| $53K | ﹤0.01% |
420
-74,172
| -99% | -$9.36M |
|
1046
Diodes
DIOD
$2.52B
| $53K | ﹤0.01% |
1,652
-750
| -31% | -$24.1K |
|
1047
Group 1 Automotive
GPI
$6.32B
| $53K | ﹤0.01% |
+1,013
| New | +$53K |
|
1048
Honda
HMC
$44.3B
| $53K | ﹤0.01% |
+2,010
| New | +$53K |
|
1049
Orion
OEC
$581M
| $53K | ﹤0.01% |
2,123
-2,947
| -58% | -$73.6K |
|
|
NTUS
1050
DELISTED
Natus Medical Inc
NTUS
| $53K | ﹤0.01% |
+1,583
| New | +$53K |
|