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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
AerCap
AER
$22B
| $277K | ﹤0.01% |
5,956
-6,952
| -54% | -$323K |
|
577
ADT
ADT
$7.13B
| $273K | ﹤0.01% |
42,779
+18,307
| +75% | +$117K |
|
578
ICU Medical
ICUI
$3.24B
| $273K | ﹤0.01% |
+1,143
| New | +$273K |
|
|
NVEE
579
DELISTED
NV5 Global
NVEE
| $271K | ﹤0.01% |
+18,276
| New | +$271K |
|
|
QD
580
Qudian
QD
$733M
| $270K | ﹤0.01% |
53,388
+51,252
| +2,399% | +$259K |
|
581
Darling Ingredients
DAR
$5.07B
| $269K | ﹤0.01% |
12,463
+818
| +7% | +$17.7K |
|
|
INST
582
DELISTED
Instructure, Inc.
INST
| $269K | ﹤0.01% |
5,709
+4,546
| +391% | +$214K |
|
583
Axon Enterprise
AXON
$57.2B
| $266K | ﹤0.01% |
+4,903
| New | +$266K |
|
584
Ryder
R
$7.64B
| $265K | ﹤0.01% |
4,276
-1,757
| -29% | -$109K |
|
585
Safety Insurance
SAFT
$1.08B
| $263K | ﹤0.01% |
3,027
+23
| +0.8% | +$2K |
|
586
Axos Financial
AX
$5.13B
| $262K | ﹤0.01% |
+9,065
| New | +$262K |
|
|
ENDP
587
DELISTED
Endo International plc
ENDP
| $261K | ﹤0.01% |
32,603
-5,286
| -14% | -$42.3K |
|
|
QIWI
588
DELISTED
QIWI PLC
QIWI
| $261K | ﹤0.01% |
18,140
-1,777
| -9% | -$25.6K |
|
|
CRZO
589
DELISTED
Carrizo Oil & Gas Inc
CRZO
| $260K | ﹤0.01% |
+20,929
| New | +$260K |
|
590
Alnylam Pharmaceuticals
ALNY
$59.2B
| $259K | ﹤0.01% |
+2,772
| New | +$259K |
|
591
Alerian MLP ETF
AMLP
$10.5B
| $259K | ﹤0.01% |
+5,182
| New | +$259K |
|
|
BEST
592
DELISTED
BEST Inc. American Depositary Shares, each representing twenty (20) Class A Ordinary Shares
BEST
| $259K | ﹤0.01% |
2,479
+2,144
| +640% | +$224K |
|
593
Euronet Worldwide
EEFT
$3.74B
| $257K | ﹤0.01% |
+1,807
| New | +$257K |
|
594
Alamos Gold
AGI
$13.5B
| $256K | ﹤0.01% |
50,405
+34,748
| +222% | +$176K |
|
595
Commault Systems
CVLT
$7.96B
| $256K | ﹤0.01% |
3,962
+3,777
| +2,042% | +$244K |
|
596
Flowserve
FLS
$7.22B
| $255K | ﹤0.01% |
+5,665
| New | +$255K |
|
|
PVTL
597
DELISTED
Pivotal Software, Inc.
PVTL
| $255K | ﹤0.01% |
+12,276
| New | +$255K |
|
598
Guess, Inc.
GES
$878M
| $254K | ﹤0.01% |
+13,006
| New | +$254K |
|
|
CONN
599
DELISTED
Conn's Inc.
CONN
| $254K | ﹤0.01% |
+11,119
| New | +$254K |
|
600
Pixelworks
PXLW
$46.2M
| $252K | ﹤0.01% |
5,357
+1,337
| +33% | +$62.9K |
|