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 |
Financial Select Sector SPDR Fund
XLF
|
+$42.3M |
| 2 |
Shopify
SHOP
|
+$37.4M |
| 3 |
Verizon
VZ
|
+$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Merck
MRK
|
+$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
+$38.3M |
| 2 |
Carnival Corp
CCL
|
+$37.6M |
| 3 |
GE Aerospace
GE
|
+$33M |
| 4 |
Advanced Micro Devices
AMD
|
+$30.6M |
| 5 |
Micron Technology
MU
|
+$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
751
iShares US Technology ETF
IYW
$23.8B
| $520K | ﹤0.01% |
4,535
-2,606
| -36% | -$299K |
|
|
ONEM
752
DELISTED
1Life Healthcare, Inc. Common Stock
ONEM
| $520K | ﹤0.01% |
+29,620
| New | +$520K |
|
|
MGLN
753
DELISTED
Magellan Health Services, Inc.
MGLN
| $520K | ﹤0.01% |
5,478
+154
| +3% | +$14.6K |
|
754
Sabesp
SBS
$15.8B
| $519K | ﹤0.01% |
70,776
-77,016
| -52% | -$565K |
|
|
TCDA
755
DELISTED
Tricida, Inc. Common Stock
TCDA
| $519K | ﹤0.01% |
54,311
+44,046
| +429% | +$421K |
|
756
PG&E
PCG
$33.5B
| $517K | ﹤0.01% |
+42,633
| New | +$517K |
|
|
WE
757
DELISTED
WeWork Inc.
WE
| $517K | ﹤0.01% |
+1,505
| New | +$517K |
|
|
BERY
758
DELISTED
Berry Global Group, Inc.
BERY
| $516K | ﹤0.01% |
7,618
-10,868
| -59% | -$736K |
|
759
Vanguard Consumer Discretionary ETF
VCR
$6.44B
| $515K | ﹤0.01% |
1,512
-878
| -37% | -$299K |
|
|
SP
760
DELISTED
SP Plus Corporation
SP
| $514K | ﹤0.01% |
18,223
-18,387
| -50% | -$519K |
|
|
ADAM
761
Adamas Trust, Inc. Common Stock
ADAM
$659M
| $513K | ﹤0.01% |
34,530
+33,805
| +4,663% | +$502K |
|
|
VRAY
762
DELISTED
ViewRay, Inc.
VRAY
| $513K | ﹤0.01% |
93,165
+44,876
| +93% | +$247K |
|
763
iShare MSCI Eurozone ETF
EZU
$7.89B
| $510K | ﹤0.01% |
10,419
+7,151
| +219% | +$350K |
|
764
Royalty Pharma
RPRX
$15.6B
| $510K | ﹤0.01% |
12,798
+11,774
| +1,150% | +$469K |
|
765
Frontier Group Holdings
ULCC
$1.17B
| $510K | ﹤0.01% |
37,592
+23,265
| +162% | +$316K |
|
766
Equitable Holdings
EQH
$15.8B
| $508K | ﹤0.01% |
15,501
+15,189
| +4,868% | +$498K |
|
767
National Beverage
FIZZ
$3.68B
| $506K | ﹤0.01% |
11,181
-9,441
| -46% | -$427K |
|
768
Heidrick & Struggles
HSII
$1.02B
| $504K | ﹤0.01% |
11,545
+11,272
| +4,129% | +$492K |
|
769
Casey's General Stores
CASY
$20B
| $502K | ﹤0.01% |
2,547
+1,868
| +275% | +$368K |
|
770
ProShares UltraShort Euro
EUO
$33.8M
| $502K | ﹤0.01% |
19,442
+19,343
| +19,538% | +$499K |
|
|
BIG
771
DELISTED
Big Lots, Inc.
BIG
| $502K | ﹤0.01% |
+11,162
| New | +$502K |
|
772
Celldex Therapeutics
CLDX
$1.66B
| $501K | ﹤0.01% |
12,990
-23,921
| -65% | -$923K |
|
773
BlueLinx
BXC
$628M
| $498K | ﹤0.01% |
5,209
+950
| +22% | +$90.8K |
|
774
CenterPoint Energy
CNP
$24.7B
| $497K | ﹤0.01% |
17,838
-25,350
| -59% | -$706K |
|
|
HES
775
DELISTED
Hess
HES
| $496K | ﹤0.01% |
6,709
-10,884
| -62% | -$805K |
|