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 | |
|---|---|---|---|---|---|---|
751
Domino's
DPZ
$15.3B
| $60K | 0.01% |
+603
| New | +$60K |
|
752
CoStar Group
CSGP
$36.6B
| $59K | 0.01% |
3,000
-1,140
| -28% | -$22.4K |
|
753
Hormel Foods
HRL
$13.7B
| $59K | 0.01% |
2,090
+1,998
| +2,172% | +$56.4K |
|
754
iShares Gold Trust
IAU
$53.5B
| $59K | 0.01% |
+2,606
| New | +$59K |
|
|
RCAP
755
DELISTED
RCS CAPITAL CORPORATION CLASS A COM
RCAP
| $59K | 0.01% |
+5,624
| New | +$59K |
|
756
SiriusXM
SIRI
$8.02B
| $58K | 0.01% |
+1,533
| New | +$58K |
|
757
Dentsply Sirona
XRAY
$2.73B
| $58K | 0.01% |
1,154
+898
| +351% | +$45.1K |
|
|
TLGT
758
DELISTED
Teligent, Inc
TLGT
| $58K | 0.01% |
+712
| New | +$58K |
|
|
DNO
759
DELISTED
United States Short Oil Fund
DNO
| $58K | 0.01% |
943
+218
| +30% | +$13.4K |
|
|
XCO
760
DELISTED
Exco Resources
XCO
| $58K | 0.01% |
+2,114
| New | +$58K |
|
761
iShares Select U.S. REIT ETF
ICF
$1.91B
| $57K | 0.01% |
1,144
+1,086
| +1,872% | +$54.1K |
|
762
PENN Entertainment
PENN
$2.93B
| $57K | 0.01% |
+3,665
| New | +$57K |
|
|
MXWL
763
DELISTED
Maxwell Technologies Inc
MXWL
| $57K | 0.01% |
+7,179
| New | +$57K |
|
764
Axon Enterprise
AXON
$58.7B
| $56K | 0.01% |
+2,327
| New | +$56K |
|
765
CommScope
COMM
$3.59B
| $56K | 0.01% |
1,977
+1,508
| +322% | +$42.7K |
|
766
New York Times
NYT
$9.37B
| $56K | 0.01% |
+4,084
| New | +$56K |
|
767
Power Integrations
POWI
$2.5B
| $56K | 0.01% |
+2,152
| New | +$56K |
|
|
NE
768
DELISTED
Noble Corporation
NE
| $56K | 0.01% |
+3,986
| New | +$56K |
|
|
DATA
769
DELISTED
Tableau Software, Inc.
DATA
| $56K | 0.01% |
608
-3,085
| -84% | -$284K |
|
770
Vail Resorts
MTN
$5.37B
| $55K | 0.01% |
539
-5,269
| -91% | -$538K |
|
|
MTOR
771
DELISTED
MERITOR, Inc.
MTOR
| $55K | 0.01% |
+4,378
| New | +$55K |
|
|
CHL
772
DELISTED
China Mobile Limited
CHL
| $55K | 0.01% |
+860
| New | +$55K |
|
773
Harley-Davidson
HOG
$3.65B
| $54K | 0.01% |
892
-7,643
| -90% | -$463K |
|
774
Hasbro
HAS
$10.9B
| $54K | 0.01% |
+866
| New | +$54K |
|
|
STON
775
DELISTED
StoneMor Inc.
STON
| $54K | 0.01% |
+1,890
| New | +$54K |
|