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 |
Advanced Micro Devices
AMD
|
$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 3 |
NIO
NIO
|
$7.66M |
| 4 |
Alibaba
BABA
|
$7.54M |
| 5 |
Micron Technology
MU
|
$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
$101M |
| 2 |
SPDR Gold Trust
GLD
|
$15.2M |
| 3 |
Amazon
AMZN
|
$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
iShares MSCI China ETF
MCHI
$7.91B
| $1.37M | ﹤0.01% |
16,716
-144
| -0.9% | -$11.8K |
|
427
PennyMac Financial
PFSI
$6.08B
| $1.35M | ﹤0.01% |
22,476
+1,401
| +7% | +$84.4K |
|
|
RADA
428
DELISTED
Rada Electronic Industries Ltd
RADA
| $1.35M | ﹤0.01% |
114,282
+45
| +0% | +$533 |
|
429
Envista
NVST
$3.54B
| $1.35M | ﹤0.01% |
30,853
| – | – |
|
430
Walt Disney
DIS
$212B
| $1.34M | ﹤0.01% |
7,585
+730
| +11% | +$129K |
|
431
Intellia Therapeutics
NTLA
$1.29B
| $1.34M | ﹤0.01% |
7,835
+7,348
| +1,509% | +$1.26M |
|
|
PRTY
432
DELISTED
Party City Holdco Inc.
PRTY
| $1.34M | ﹤0.01% |
139,971
+10,954
| +8% | +$105K |
|
433
Sony
SONY
$165B
| $1.34M | ﹤0.01% |
68,145
+3,385
| +5% | +$66.5K |
|
434
Genius Sports
GENI
$3.22B
| $1.34M | ﹤0.01% |
71,940
-6,285
| -8% | -$117K |
|
435
Carrier Global
CARR
$55.8B
| $1.33M | ﹤0.01% |
27,353
+598
| +2% | +$29.1K |
|
436
Marathon Digital Holdings
MARA
$5.63B
| $1.33M | ﹤0.01% |
43,273
-9,187
| -18% | -$282K |
|
437
Mirion Technologies
MIR
$5.28B
| $1.32M | ﹤0.01% |
127,909
-2,802
| -2% | -$28.8K |
|
438
Ericsson
ERIC
$26.7B
| $1.31M | ﹤0.01% |
103,083
+9,000
| +10% | +$115K |
|
439
MarketAxess Holdings
MKTX
$7.01B
| $1.31M | ﹤0.01% |
2,829
-100
| -3% | -$46.4K |
|
440
Enphase Energy
ENPH
$5.18B
| $1.31M | ﹤0.01% |
7,162
-4,145
| -37% | -$759K |
|
441
Marriott Vacations Worldwide
VAC
$2.73B
| $1.3M | ﹤0.01% |
8,075
| – | – |
|
442
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1.03B
| $1.29M | ﹤0.01% |
79,778
| – | – |
|
443
Sprouts Farmers Market
SFM
$13.6B
| $1.29M | ﹤0.01% |
50,934
+18,864
| +59% | +$479K |
|
444
AST SpaceMobile
ASTS
$11.4B
| $1.29M | ﹤0.01% |
99,515
-10,986
| -10% | -$142K |
|
445
ProPetro Holding
PUMP
$496M
| $1.29M | ﹤0.01% |
130,107
| – | – |
|
446
iShares MSCI Europe Financials ETF
EUFN
$4.36B
| $1.29M | ﹤0.01% |
65,116
-3,500
| -5% | -$69.1K |
|
447
H&R Block
HRB
$6.85B
| $1.29M | ﹤0.01% |
54,056
| – | – |
|
448
Edison International
EIX
$21B
| $1.27M | ﹤0.01% |
22,013
+9,878
| +81% | +$572K |
|
449
ARK Web x.0 ETF
ARKW
$2.33B
| $1.27M | ﹤0.01% |
8,410
-204
| -2% | -$30.9K |
|
450
Cenovus Energy
CVE
$28.7B
| $1.27M | ﹤0.01% |
128,580
+13,501
| +12% | +$134K |
|