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 | |
|---|---|---|---|---|---|---|
|
MUDS
1051
DELISTED
Mudrick Capital Acquisition Corporation II Class A Common Stock
MUDS
| $266K | ﹤0.01% |
26,789
-53,713
| -67% | -$533K |
|
1052
Celanese
CE
$4.84B
| $263K | ﹤0.01% |
1,570
-13,321
| -89% | -$2.23M |
|
1053
iShares US Aerospace & Defense ETF
ITA
$9.31B
| $263K | ﹤0.01% |
2,561
-3,925
| -61% | -$403K |
|
1054
iShares US Healthcare ETF
IYH
$2.79B
| $263K | ﹤0.01% |
+4,380
| New | +$263K |
|
1055
Paylocity
PCTY
$9.48B
| $263K | ﹤0.01% |
1,114
+821
| +280% | +$194K |
|
|
ATIP
1056
DELISTED
ATI Physical Therapy, Inc.
ATIP
| $263K | ﹤0.01% |
1,554
+930
| +149% | +$157K |
|
1057
Entegris
ENTG
$12B
| $262K | ﹤0.01% |
+1,894
| New | +$262K |
|
1058
Frontline
FRO
$5.12B
| $262K | ﹤0.01% |
37,140
-64,689
| -64% | -$456K |
|
1059
Interactive Brokers
IBKR
$28.2B
| $262K | ﹤0.01% |
13,200
-92,336
| -87% | -$1.83M |
|
1060
First Trust Natural Gas ETF
FCG
$332M
| $261K | ﹤0.01% |
15,235
+8,947
| +142% | +$153K |
|
1061
Qfin Holdings, Inc. American Depositary Shares
QFIN
$3.73B
| $261K | ﹤0.01% |
11,399
-19,232
| -63% | -$440K |
|
|
SGEN
1062
DELISTED
Seagen Inc. Common Stock
SGEN
| $261K | ﹤0.01% |
1,694
-5,217
| -75% | -$804K |
|
1063
iShares Asia 50 ETF
AIA
$995M
| $260K | ﹤0.01% |
3,398
+1,244
| +58% | +$95.2K |
|
1064
Siren ETF Trust Siren Nasdaq NexGen Economy ETF
BLCN
$47.9M
| $260K | ﹤0.01% |
6,123
-2,660
| -30% | -$113K |
|
1065
Cellebrite
CLBT
$4.18B
| $260K | ﹤0.01% |
+32,424
| New | +$260K |
|
1066
Kezar Life Sciences
KZR
$29.3M
| $259K | ﹤0.01% |
+1,551
| New | +$259K |
|
1067
Robert Half
RHI
$3.56B
| $259K | ﹤0.01% |
2,328
-2,824
| -55% | -$314K |
|
|
WPRT
1068
Westport Fuel Systems
WPRT
$40.9M
| $259K | ﹤0.01% |
10,968
+4,099
| +60% | +$96.8K |
|
1069
Babcock & Wilcox
BW
$250M
| $257K | ﹤0.01% |
28,520
+23,042
| +421% | +$208K |
|
1070
iShares S&P 500 Value ETF
IVE
$41.3B
| $257K | ﹤0.01% |
+1,643
| New | +$257K |
|
1071
Alliant Energy
LNT
$16.4B
| $257K | ﹤0.01% |
4,184
+413
| +11% | +$25.4K |
|
1072
GXO Logistics
GXO
$5.76B
| $256K | ﹤0.01% |
+2,822
| New | +$256K |
|
1073
USA Compression Partners
USAC
$2.84B
| $256K | ﹤0.01% |
+14,675
| New | +$256K |
|
1074
ProShares UltraShort FTSE Europe
EPV
$15.7M
| $255K | ﹤0.01% |
4,614
+866
| +23% | +$47.9K |
|
1075
Wayfair
W
$11.3B
| $255K | ﹤0.01% |
1,345
-1,446
| -52% | -$274K |
|