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 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
526
Infosys
INFY
$70.5B
| $299K | 0.01% |
39,930
-33,592
| -46% | -$252K |
|
527
Aon
AON
$79B
| $298K | 0.01% |
+2,245
| New | +$298K |
|
528
Designer Brands
DBI
$215M
| $297K | 0.01% |
16,815
-15,360
| -48% | -$271K |
|
529
Wolfspeed
WOLF
$285M
| $296K | 0.01% |
12,045
-5,532
| -31% | -$136K |
|
|
MBT
530
DELISTED
Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares
MBT
| $296K | 0.01% |
35,431
+6,198
| +21% | +$51.8K |
|
531
Thor Industries
THO
$5.92B
| $294K | 0.01% |
2,814
+784
| +39% | +$81.9K |
|
|
ACOR
532
DELISTED
Acorda Therapeutics, Inc.
ACOR
| $292K | 0.01% |
124
+106
| +589% | +$250K |
|
533
CACI
CACI
$10.4B
| $291K | 0.01% |
2,335
+2,155
| +1,197% | +$269K |
|
|
GRA
534
DELISTED
W.R. Grace & Co.
GRA
| $291K | 0.01% |
4,048
-12,191
| -75% | -$876K |
|
535
Essent Group
ESNT
$6.21B
| $290K | 0.01% |
7,827
-8,174
| -51% | -$303K |
|
|
OIL
536
DELISTED
Barclays Bank PLC iPath Exchange Traded Notes Linked to Goldman Sachs Crude Oil Total Return In
OIL
| $290K | 0.01% |
59,838
-8,622
| -13% | -$41.8K |
|
537
AngloGold Ashanti
AU
$31.3B
| $289K | 0.01% |
29,809
-9,382
| -24% | -$91K |
|
|
ANDX
538
DELISTED
Andeavor Logistics LP
ANDX
| $289K | 0.01% |
5,597
-982
| -15% | -$50.7K |
|
539
abrdn Physical Gold Shares ETF
SGOL
$5.78B
| $288K | 0.01% |
+23,970
| New | +$288K |
|
540
SPS Commerce
SPSC
$4.19B
| $287K | 0.01% |
9,006
+5,212
| +137% | +$166K |
|
|
PRAH
541
DELISTED
PRA Health Sciences, Inc.
PRAH
| $287K | 0.01% |
+3,831
| New | +$287K |
|
|
B
542
Barrick Mining Corporation
B
$49.7B
| $285K | 0.01% |
+17,972
| New | +$285K |
|
543
Sensata Technologies
ST
$4.66B
| $283K | 0.01% |
6,645
-30,633
| -82% | -$1.3M |
|
544
Comtech Telecommunications
CMTL
$69.7M
| $282K | 0.01% |
14,916
+8
| +0.1% | +$151 |
|
|
SPN
545
DELISTED
Superior Energy Services, Inc.
SPN
| $282K | 0.01% |
27,133
-15,402
| -36% | -$160K |
|
546
Rockwell Automation
ROK
$38.8B
| $281K | 0.01% |
1,735
+1,633
| +1,601% | +$264K |
|
547
Embraer
ERJ
$11.1B
| $280K | 0.01% |
+15,391
| New | +$280K |
|
548
Xylem
XYL
$34.1B
| $279K | 0.01% |
5,048
-6,797
| -57% | -$376K |
|
|
NSR
549
DELISTED
Neustar Inc
NSR
| $279K | 0.01% |
8,374
-20,656
| -71% | -$688K |
|
|
HSNI
550
DELISTED
HSN, Inc.
HSNI
| $277K | 0.01% |
+8,714
| New | +$277K |
|