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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
376
HUB Group
HUBG
$2.29B
| $1.08M | ﹤0.01% |
+31,958
| New | +$1.08M |
|
377
iShares US Real Estate ETF
IYR
$3.76B
| $1.07M | ﹤0.01% |
+11,671
| New | +$1.07M |
|
378
MarketAxess Holdings
MKTX
$7.01B
| $1.07M | ﹤0.01% |
2,148
+1,219
| +131% | +$607K |
|
379
Direxion Daily MSCI India Bull 2X Shares
INDL
$66.3M
| $1.06M | ﹤0.01% |
22,602
+13,112
| +138% | +$617K |
|
380
Equity Residential
EQR
$25.5B
| $1.06M | ﹤0.01% |
14,848
-13,894
| -48% | -$995K |
|
381
VictoryShares US 500 Volatility Wtd ETF
CFA
$533M
| $1.06M | ﹤0.01% |
+15,803
| New | +$1.06M |
|
382
SPDR S&P Biotech ETF
XBI
$5.39B
| $1.06M | ﹤0.01% |
+7,791
| New | +$1.06M |
|
|
QUOT
383
DELISTED
Quotient Technology Inc
QUOT
| $1.05M | ﹤0.01% |
64,415
+24,263
| +60% | +$396K |
|
384
Heron Therapeutics
HRTX
$201M
| $1.04M | ﹤0.01% |
+64,103
| New | +$1.04M |
|
385
Frontline
FRO
$4.93B
| $1.03M | ﹤0.01% |
144,659
+114,338
| +377% | +$817K |
|
386
ProShares Ultra Financials
UYG
$864M
| $1.03M | ﹤0.01% |
19,600
+779
| +4% | +$41.1K |
|
387
Madison Square Garden
MSGS
$4.71B
| $1.03M | ﹤0.01% |
5,737
+1,949
| +51% | +$350K |
|
|
ABMD
388
DELISTED
Abiomed Inc
ABMD
| $1.02M | ﹤0.01% |
3,211
-12,841
| -80% | -$4.09M |
|
|
BZUN
389
Baozun
BZUN
$223M
| $1.02M | ﹤0.01% |
26,822
+2,248
| +9% | +$85.7K |
|
390
United States 12 Month Oil Fund,
USL
$42.3M
| $1.02M | ﹤0.01% |
48,768
+16,021
| +49% | +$335K |
|
|
HAAC
391
DELISTED
Health Assurance Acquisition Corp. Class A Common Stock
HAAC
| $1.02M | ﹤0.01% |
+99,872
| New | +$1.02M |
|
|
RADA
392
DELISTED
Rada Electronic Industries Ltd
RADA
| $1.02M | ﹤0.01% |
84,795
+52,407
| +162% | +$629K |
|
|
DQ
393
Daqo New Energy
DQ
$1.96B
| $1.01M | ﹤0.01% |
13,432
-5,605
| -29% | -$423K |
|
394
Southern Copper
SCCO
$83.6B
| $1.01M | ﹤0.01% |
15,620
-12,733
| -45% | -$823K |
|
|
WIMI
395
WiMi Hologram Cloud
WIMI
$38.1M
| $1M | ﹤0.01% |
15,205
+12,682
| +503% | +$837K |
|
|
TTM
396
DELISTED
Tata Motors Limited
TTM
| $1M | ﹤0.01% |
+48,253
| New | +$1M |
|
397
RLX Technology
RLX
$3.18B
| $998K | ﹤0.01% |
+96,333
| New | +$998K |
|
398
Magnachip Semiconductor
MX
$107M
| $995K | ﹤0.01% |
39,983
+28,271
| +241% | +$704K |
|
|
APHA
399
DELISTED
Aphria Inc. Common Shares
APHA
| $992K | ﹤0.01% |
54,005
-1,607
| -3% | -$29.5K |
|
400
CDW
CDW
$22.2B
| $984K | ﹤0.01% |
5,939
+4,520
| +319% | +$749K |
|