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 | |
|---|---|---|---|---|---|---|
|
AMRI
576
DELISTED
Albany Molecular Research Inc
AMRI
| $116K | 0.01% |
6,600
-9,957
| -60% | -$175K |
|
577
Alerian MLP ETF
AMLP
$10.5B
| $114K | 0.01% |
+1,385
| New | +$114K |
|
578
Monolithic Power Systems
MPWR
$41.2B
| $114K | 0.01% |
+2,168
| New | +$114K |
|
|
EEP
579
DELISTED
Enbridge Energy Partners
EEP
| $114K | 0.01% |
3,177
-852
| -21% | -$30.6K |
|
|
CHMT
580
DELISTED
Chemtura Corporation
CHMT
| $114K | 0.01% |
4,182
+2,206
| +112% | +$60.1K |
|
581
Skechers
SKX
$9.5B
| $113K | 0.01% |
+4,725
| New | +$113K |
|
|
SGEN
582
DELISTED
Seagen Inc. Common Stock
SGEN
| $113K | 0.01% |
3,197
-4,353
| -58% | -$154K |
|
583
ProShares UltraPro Short QQQ
SQQQ
$2.24B
| $112K | 0.01% |
+2
| New | +$112K |
|
584
Barclays
BCS
$71.7B
| $112K | 0.01% |
8,286
-5,616
| -40% | -$75.9K |
|
|
TCS
585
DELISTED
THE CONTAINER STORE GROUP, INC.
TCS
| $111K | 0.01% |
+389
| New | +$111K |
|
|
CHUY
586
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $111K | 0.01% |
4,954
-1,701
| -26% | -$38.1K |
|
|
ARRY
587
DELISTED
Array Biopharma Inc
ARRY
| $111K | 0.01% |
15,186
-3,322
| -18% | -$24.3K |
|
|
588
Gilead Sciences
GILD
$143B
| $110K | 0.01% |
1,121
-318,305
| -100% | -$31.2M |
|
589
Visteon
VC
$3.4B
| $110K | 0.01% |
1,149
-2,798
| -71% | -$268K |
|
|
QIWI
590
DELISTED
QIWI PLC
QIWI
| $110K | 0.01% |
+4,614
| New | +$110K |
|
591
Constellium
CSTM
$1.99B
| $109K | 0.01% |
5,396
+5,230
| +3,151% | +$106K |
|
592
Deluxe
DLX
$852M
| $109K | 0.01% |
+1,578
| New | +$109K |
|
593
Vanguard Energy ETF
VDE
$7.26B
| $109K | 0.01% |
1,000
-1,201
| -55% | -$131K |
|
594
Akamai
AKAM
$11.1B
| $108K | 0.01% |
+1,533
| New | +$108K |
|
|
GLF
595
DELISTED
GulfMark Offshore, Inc. Common Stock
GLF
| $108K | 0.01% |
8,332
+525
| +7% | +$6.81K |
|
596
Advance Auto Parts
AAP
$3.56B
| $107K | 0.01% |
721
-291
| -29% | -$43.2K |
|
597
Dycom Industries
DY
$7.63B
| $107K | 0.01% |
2,197
+1,732
| +372% | +$84.4K |
|
|
WPX
598
DELISTED
WPX Energy, Inc.
WPX
| $107K | 0.01% |
9,855
+4,350
| +79% | +$47.2K |
|
|
OKS
599
DELISTED
Oneok Partners LP
OKS
| $107K | 0.01% |
2,631
-1,169
| -31% | -$47.5K |
|
|
PCL
600
DELISTED
PLUM CREEK TIMBER CO (REIT)
PCL
| $107K | 0.01% |
2,484
-368
| -13% | -$15.9K |
|