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 | |
|---|---|---|---|---|---|---|
551
ATI
ATI
$10.6B
| $276K | 0.01% |
16,276
+10,420
| +178% | +$177K |
|
552
Goodyear
GT
$2.42B
| $276K | 0.01% |
+7,922
| New | +$276K |
|
553
Banc of California
BANC
$2.67B
| $273K | 0.01% |
+12,730
| New | +$273K |
|
554
Valero Energy
VLO
$50B
| $273K | 0.01% |
+4,047
| New | +$273K |
|
|
VGR
555
DELISTED
Vector Group Ltd.
VGR
| $271K | 0.01% |
20,752
-16,202
| -44% | -$212K |
|
556
Equinix
EQIX
$78.2B
| $270K | 0.01% |
+630
| New | +$270K |
|
557
Keysight
KEYS
$29.3B
| $270K | 0.01% |
6,952
+6,730
| +3,032% | +$261K |
|
|
AKS
558
DELISTED
AK Steel Holding Corp.
AKS
| $269K | 0.01% |
41,052
+40,129
| +4,348% | +$263K |
|
559
Direxion Daily S&P Biotech Bull 3X Shares
LABU
$700M
| $268K | 0.01% |
213
+31
| +17% | +$39K |
|
560
Align Technology
ALGN
$9.84B
| $267K | 0.01% |
+1,780
| New | +$267K |
|
|
NAV
561
DELISTED
Navistar International
NAV
| $266K | 0.01% |
+10,158
| New | +$266K |
|
562
Visteon
VC
$3.42B
| $265K | 0.01% |
+2,599
| New | +$265K |
|
563
AGCO
AGCO
$8.12B
| $264K | 0.01% |
+3,918
| New | +$264K |
|
564
Cemex
CX
$13.8B
| $263K | 0.01% |
+28,019
| New | +$263K |
|
565
CEVA Inc
CEVA
$545M
| $262K | 0.01% |
+5,767
| New | +$262K |
|
566
Teradyne
TER
$18.4B
| $262K | 0.01% |
8,754
-32,367
| -79% | -$969K |
|
567
Valmont Industries
VMI
$7.44B
| $262K | 0.01% |
1,754
+410
| +31% | +$61.2K |
|
|
MDCO
568
DELISTED
Medicines Co
MDCO
| $261K | 0.01% |
6,871
-29,149
| -81% | -$1.11M |
|
569
Edgewell Personal Care
EPC
$1.02B
| $260K | 0.01% |
+3,430
| New | +$260K |
|
570
Agnico Eagle Mines
AEM
$77.9B
| $259K | 0.01% |
5,743
-21,618
| -79% | -$975K |
|
571
RingCentral
RNG
$2.83B
| $259K | 0.01% |
+7,087
| New | +$259K |
|
572
Century Aluminum
CENX
$2.12B
| $258K | 0.01% |
+16,600
| New | +$258K |
|
|
MB
573
DELISTED
MINDBODY, Inc. Class A Common Stock
MB
| $257K | 0.01% |
+9,452
| New | +$257K |
|
574
Assembly Biosciences
ASMB
$178M
| $256K | 0.01% |
1,035
-374
| -27% | -$92.5K |
|
|
YRD
575
Yiren Digital
YRD
$503M
| $255K | 0.01% |
10,202
+5,216
| +105% | +$130K |
|