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 |
NVIDIA
NVDA
|
$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
$18M |
| 4 |
Netflix
NFLX
|
$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
$41.3M |
| 3 |
Walt Disney
DIS
|
$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3576
AutoNation
AN
$8.31B
| – | – |
-1,573
| Closed | -$56K |
|
3577
Andersons Inc
ANDE
$1.39B
| $0 | ﹤0.01% |
+5
| New | – |
|
3578
Arista Networks
ANET
$173B
| – | – |
-2,652
| Closed | -$833K |
|
3579
Deluxe
DLX
$852M
| – | – |
-579
| Closed | -$25K |
|
3580
Dorchester Minerals
DMLP
$1.2B
| – | – |
-1,943
| Closed | -$35K |
|
|
NOAH
3581
Noah Holdings
NOAH
$812M
| – | – |
-1,946
| Closed | -$94K |
|
3582
Valero Energy
VLO
$48.3B
| – | – |
-31,512
| Closed | -$2.67M |
|
3583
Valley National Bancorp
VLY
$5.88B
| – | – |
0
| – | – |
|
3584
Vanda Pharmaceuticals
VNDA
$279M
| – | – |
0
| – | – |
|
|
VNET
3585
VNET Group
VNET
$2.15B
| – | – |
0
| – | – |
|
|
DCPH
3586
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| – | – |
0
| – | – |
|
|
ERF
3587
DELISTED
Enerplus Corporation
ERF
| – | – |
-100
| Closed | – |
|
|
ICD
3588
DELISTED
Independence Contract Drilling, Inc.
ICD
| $0 | ﹤0.01% |
100
-3,146
| -97% | – |
|