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 |
Alibaba
BABA
|
$48.9M |
| 2 |
Boeing
BA
|
$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
FedEx
FDX
|
$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
$17.5M |
| 4 |
Netflix
NFLX
|
$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3601
AvalonBay Communities
AVB
$27.1B
| – | – |
-2,642
| Closed | -$536K |
|
3602
American Vanguard Corp
AVD
$155M
| – | – |
-120
| Closed | -$1K |
|
3603
Avanos Medical
AVNS
$555M
| – | – |
-882
| Closed | -$38K |
|
3604
Avnet
AVT
$4.37B
| – | – |
-2,187
| Closed | -$99K |
|
3605
Avantor
AVTR
$8.88B
| – | – |
-7,363
| Closed | -$140K |
|
3606
Avery Dennison
AVY
$13B
| – | – |
-4,269
| Closed | -$493K |
|
3607
Armstrong World Industries
AWI
$8.39B
| – | – |
-23,663
| Closed | -$2.3M |
|