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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
751
iShares MSCI Chile ETF
ECH
$726M
| $139K | ﹤0.01% |
+3,366
| New | +$139K |
|
752
Equity Residential
EQR
$25.4B
| $139K | ﹤0.01% |
2,115
-7,532
| -78% | -$495K |
|
753
Pixelworks
PXLW
$69.5M
| $139K | ﹤0.01% |
4,020
-355
| -8% | -$12.3K |
|
754
Teradyne
TER
$18.6B
| $139K | ﹤0.01% |
+4,453
| New | +$139K |
|
755
Reliance Steel & Aluminium
RS
$15.6B
| $138K | ﹤0.01% |
1,941
+1,201
| +162% | +$85.4K |
|
756
Western Alliance Bancorporation
WAL
$9.91B
| $138K | ﹤0.01% |
3,503
-604
| -15% | -$23.8K |
|
|
JO
757
DELISTED
iPath Series B Bloomberg Coffee Subindex Total ReturnSM ETN
JO
| $138K | ﹤0.01% |
+3,708
| New | +$138K |
|
758
Evertec
EVTC
$2.17B
| $137K | ﹤0.01% |
4,778
+4,432
| +1,281% | +$127K |
|
759
Halozyme
HALO
$8.93B
| $137K | ﹤0.01% |
9,406
-3,729
| -28% | -$54.3K |
|
760
Warrior Met Coal
HCC
$3.12B
| $135K | ﹤0.01% |
+5,626
| New | +$135K |
|
|
SA
761
Seabridge Gold
SA
$1.84B
| $135K | ﹤0.01% |
+10,238
| New | +$135K |
|
762
Columbia Sportswear
COLM
$3.02B
| $134K | ﹤0.01% |
+1,600
| New | +$134K |
|
763
E.W. Scripps
SSP
$246M
| $134K | ﹤0.01% |
8,570
-16,667
| -66% | -$261K |
|
764
Hilltop Holdings
HTH
$2.2B
| $133K | ﹤0.01% |
7,514
+6,487
| +632% | +$115K |
|
765
Lloyds Banking Group
LYG
$66.7B
| $133K | ﹤0.01% |
52,300
+47,414
| +970% | +$121K |
|
766
Gibraltar Industries
ROCK
$1.83B
| $133K | ﹤0.01% |
3,764
-1,613
| -30% | -$57K |
|
|
DOOR
767
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $133K | ﹤0.01% |
+2,972
| New | +$133K |
|
768
Quest Diagnostics
DGX
$20.4B
| $132K | ﹤0.01% |
+1,593
| New | +$132K |
|
769
MaxLinear
MXL
$1.36B
| $132K | ﹤0.01% |
7,510
-20,023
| -73% | -$352K |
|
770
Stanley Black & Decker
SWK
$12.3B
| $132K | ﹤0.01% |
1,106
-23,377
| -95% | -$2.79M |
|
|
CORE
771
DELISTED
Core Mark Holding Co., Inc.
CORE
| $132K | ﹤0.01% |
+5,681
| New | +$132K |
|
772
MakeMyTrip
MMYT
$9.39B
| $131K | ﹤0.01% |
5,417
-2,038
| -27% | -$49.3K |
|
|
DESP
773
DELISTED
Despegar.com
DESP
| $130K | ﹤0.01% |
+10,534
| New | +$130K |
|
774
Ecopetrol
EC
$19.2B
| $130K | ﹤0.01% |
+8,211
| New | +$130K |
|
|
MNK
775
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $130K | ﹤0.01% |
8,240
-47,145
| -85% | -$744K |
|