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 |
Apple
AAPL
|
$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$38.8M |
| 4 |
Amazon
AMZN
|
$38.6M |
| 5 |
Tesla
TSLA
|
$36M |
Top Sells
| 1 |
Alibaba
BABA
|
$46.4M |
| 2 |
Boeing
BA
|
$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
NVIDIA
NVDA
|
$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3601
American Axle
AXL
$701M
| – | – |
0
| – | – |
|
3602
AXIS Capital
AXS
$7.7B
| – | – |
-1,343
| Closed | -$89K |
|
3603
AZZ Inc
AZZ
$3.36B
| – | – |
0
| – | – |
|
|
3604
Boeing
BA
$176B
| – | – |
-78,444
| Closed | -$29.8M |
|
3605
Banner Corp
BANR
$2.32B
| – | – |
0
| – | – |
|
3606
Atlanta Braves Holdings Series A
BATRA
$2.92B
| $0 | ﹤0.01% |
+1
| New | – |
|
3607
BBVA Argentina
BBAR
$2.52B
| – | – |
0
| – | – |
|
3608
Brunswick
BC
$4.17B
| – | – |
0
| – | – |
|
3609
BCE
BCE
$22.7B
| – | – |
0
| – | – |
|
|
BCLI
3610
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| – | – |
0
| – | – |
|
3611
Brink's
BCO
$4.72B
| – | – |
0
| – | – |
|
3612
Barclays
BCS
$68.7B
| – | – |
0
| – | – |
|
3613
Belden
BDC
$5.01B
| – | – |
0
| – | – |
|
|
BDN
3614
Brandywine Realty Trust
BDN
$733M
| – | – |
0
| – | – |
|
3615
Becton Dickinson
BDX
$53B
| – | – |
0
| – | – |
|
|
BELFB
3616
Bel Fuse Class B
BELFB
$1.75B
| – | – |
0
| – | – |
|
3617
Franklin Resources
BEN
$13.3B
| – | – |
-675
| Closed | -$19K |
|
3618
Bright Horizons
BFAM
$6.57B
| – | – |
-573
| Closed | -$87K |
|
3619
Big 5 Sporting Goods
BGFV
$32.8M
| – | – |
0
| – | – |
|
3620
Bausch Health
BHC
$2.8B
| – | – |
-28,287
| Closed | -$618K |
|