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 |
Alphabet (Google) Class C
GOOG
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3226
American Financial Group
AFG
$11.5B
| – | – |
0
| – | – |
|
3227
AerCap
AER
$22.2B
| – | – |
-69
| Closed | -$3K |
|
3228
American Eagle Outfitters
AEO
$2.36B
| – | – |
-6,722
| Closed | -$93K |
|
3229
Agnico Eagle Mines
AEM
$74.7B
| – | – |
-1,892
| Closed | -$47K |
|
3230
Ameren
AEE
$27B
| – | – |
-1,352
| Closed | -$62K |
|
3231
Adtran
ADTN
$743M
| – | – |
0
| – | – |
|
3232
Analog Devices
ADI
$120B
| – | – |
-1,300
| Closed | -$72K |
|
3233
Adobe
ADBE
$148B
| – | – |
-463
| Closed | -$34K |
|
3234
Achieve Life Sciences
ACHV
$146M
| – | – |
0
-61
| -100% | – |
|
3235
Acadia Pharmaceuticals
ACAD
$4.34B
| – | – |
0
| – | – |
|
3236
Asbury Automotive
ABG
$4.99B
| – | – |
-1,772
| Closed | -$135K |
|
3237
Ambev
ABEV
$33.5B
| – | – |
-1
| Closed | – |
|
3238
Ameris Bancorp
ABCB
$5B
| – | – |
0
| – | – |
|
3239
AllianceBernstein
AB
$4.37B
| – | – |
0
| – | – |
|
3240
Aaon
AAON
$6.54B
| – | – |
0
| – | – |
|
3241
American Airlines Group
AAL
$8.87B
| – | – |
0
| – | – |
|
3242
Unum
UNM
$12.4B
| – | – |
0
| – | – |
|