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 |
Goldman Sachs
GS
|
$38.4M |
| 2 |
Micron Technology
MU
|
$23.7M |
| 3 |
NVIDIA
NVDA
|
$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$21.7M |
| 5 |
Wells Fargo
WFC
|
$20.4M |
Top Sells
| 1 |
Citigroup
C
|
$21.6M |
| 2 |
Apple
AAPL
|
$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
$13.3M |
| 4 |
Eli Lilly
LLY
|
$9.69M |
| 5 |
Mastercard
MA
|
$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3526
CSG Systems International
CSGS
$1.85B
| – | – | -609 | Closed | -$29K |
|
|
CSR
3527
Centerspace
CSR
$997M
| – | – | -882 | Closed | -$6K |
|
3528
Constellium
CSTM
$2.02B
| – | – | -68 | Closed | – |
|
3529
Cintas
CTAS
$84.6B
| – | – | -2,395 | Closed | -$276K |
|
3530
CSX Corp
CSX
$60.6B
| – | – | -3,920 | Closed | -$140K |
|
3531
Cantaloupe
CTLP
$797M
| – | – | -1,818 | Closed | -$7K |
|
3532
Cognizant
CTSH
$35.3B
| – | – | 0 | – | – |
|
3533
Customers Bancorp
CUBI
$2.27B
| – | – | 0 | – | – |
|
3534
Carnival PLC
CUK
$38.2B
| – | – | 0 | – | – |
|
3535
Curtiss-Wright
CW
$18B
| – | – | 0 | – | – |
|
3536
Clearway Energy Class C
CWEN
$3.51B
| – | – | 0 | – | – |
|
3537
Cemex
CX
$13.2B
| – | – | 0 | – | – |
|
3538
Crane NXT
CXT
$3.43B
| – | – | 0 | – | – |
|
3539
Axogen
AXGN
$743M
| – | – | 0 | – | – |
|
3540
Axon Enterprise
AXON
$58.7B
| – | – | -9,040 | Closed | -$219K |
|
3541
American Express
AXP
$231B
| – | – | 0 | – | – |
|
3542
Axalta
AXTA
$6.77B
| – | – | -23,961 | Closed | -$651K |
|