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 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$16.3M |
| 3 |
Walt Disney
DIS
|
+$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.4M |
| 5 |
Gilead Sciences
GILD
|
+$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$95.3M |
| 2 |
Apple
AAPL
|
+$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
601
iShares Russell Mid-Cap Value ETF
IWS
$14.1B
| $130K | 0.01% |
+1,942
| New | +$130K |
|
602
TriNet
TNET
$3.3B
| $130K | 0.01% |
7,763
+7,168
| +1,205% | +$120K |
|
|
CPN
603
DELISTED
Calpine Corporation
CPN
| $130K | 0.01% |
+8,943
| New | +$130K |
|
604
Allegiant Air
ALGT
$1.16B
| $128K | 0.01% |
+592
| New | +$128K |
|
605
Ameriprise Financial
AMP
$46.4B
| $128K | 0.01% |
1,173
-249
| -18% | -$27.2K |
|
606
SPDR Euro Stoxx 50 ETF
FEZ
$4.54B
| $128K | 0.01% |
3,805
-155
| -4% | -$5.21K |
|
|
ZAYO
607
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $128K | 0.01% |
5,053
+2,138
| +73% | +$54.2K |
|
|
WIN
608
DELISTED
Windstream Holdings Inc
WIN
| $128K | 0.01% |
+4,175
| New | +$128K |
|
609
American Coastal Insurance
ACIC
$526M
| $127K | 0.01% |
9,661
+329
| +4% | +$4.33K |
|
610
Simon Property Group
SPG
$58.5B
| $127K | 0.01% |
695
-2,945
| -81% | -$538K |
|
611
Karyopharm Therapeutics
KPTI
$53.8M
| $126K | 0.01% |
804
+767
| +2,073% | +$120K |
|
612
Travel + Leisure Co
TNL
$4B
| $126K | 0.01% |
3,896
+3,158
| +428% | +$102K |
|
613
Waters Corp
WAT
$17.4B
| $126K | 0.01% |
+1,072
| New | +$126K |
|
|
SIOX
614
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $126K | 0.01% |
+1,225
| New | +$126K |
|
|
ZLTQ
615
DELISTED
ZELTIQ Aesthetics, Inc.
ZLTQ
| $126K | 0.01% |
3,951
-8,194
| -67% | -$261K |
|
616
Ligand Pharmaceuticals
LGND
$3.24B
| $125K | 0.01% |
+2,344
| New | +$125K |
|
617
Sinclair Inc
SBGI
$933M
| $125K | 0.01% |
4,950
+3,290
| +198% | +$83.1K |
|
618
Hasbro
HAS
$10.9B
| $124K | 0.01% |
+1,722
| New | +$124K |
|
619
Pitney Bowes
PBI
$1.96B
| $124K | 0.01% |
6,265
+140
| +2% | +$2.77K |
|
620
Western Digital
WDC
$33B
| $124K | 0.01% |
2,073
-40,808
| -95% | -$2.44M |
|
|
CST
621
DELISTED
CST Brands, Inc.
CST
| $124K | 0.01% |
3,692
-953
| -21% | -$32K |
|
622
AMN Healthcare
AMN
$751M
| $123K | 0.01% |
+4,123
| New | +$123K |
|
623
TripAdvisor
TRIP
$2.06B
| $122K | 0.01% |
1,951
-9,990
| -84% | -$625K |
|
|
FMI
624
DELISTED
Foundation Medicine, Inc.
FMI
| $122K | 0.01% |
6,639
+4,740
| +250% | +$87.1K |
|
|
VA
625
DELISTED
Virgin America Inc.
VA
| $122K | 0.01% |
3,577
+1,989
| +125% | +$67.8K |
|