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 | |
|---|---|---|---|---|---|---|
601
iShares MSCI Chile ETF
ECH
$726M
| $593K | ﹤0.01% |
+17,318
| New | +$593K |
|
|
ATHX
602
DELISTED
Athersys, Inc. Common Stock
ATHX
| $591K | ﹤0.01% |
13,153
+11,280
| +602% | +$507K |
|
603
Hyster-Yale Materials Handling
HY
$668M
| $589K | ﹤0.01% |
+6,762
| New | +$589K |
|
604
Ichor Holdings
ICHR
$579M
| $588K | ﹤0.01% |
10,933
+8,993
| +464% | +$484K |
|
|
RIDE
605
DELISTED
Lordstown Motors Corp. Class A Common Stock
RIDE
| $587K | ﹤0.01% |
3,330
-215
| -6% | -$37.9K |
|
606
Nutrien
NTR
$27.4B
| $583K | ﹤0.01% |
10,820
+2,678
| +33% | +$144K |
|
607
Purple Innovation
PRPL
$122M
| $583K | ﹤0.01% |
18,451
+11,736
| +175% | +$371K |
|
608
Playtika
PLTK
$1.4B
| $582K | ﹤0.01% |
+21,399
| New | +$582K |
|
|
ASTR
609
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $582K | ﹤0.01% |
+3,295
| New | +$582K |
|
610
Innovative Industrial Properties
IIPR
$1.61B
| $581K | ﹤0.01% |
+3,228
| New | +$581K |
|
611
Jabil
JBL
$22.5B
| $579K | ﹤0.01% |
+11,102
| New | +$579K |
|
612
Appian
APPN
$2.26B
| $578K | ﹤0.01% |
4,355
-627
| -13% | -$83.2K |
|
|
BTCM
613
BIT Mining
BTCM
$46.6M
| $578K | ﹤0.01% |
2,706
+2,283
| +540% | +$488K |
|
614
Axon Enterprise
AXON
$57.2B
| $574K | ﹤0.01% |
4,035
-480
| -11% | -$68.3K |
|
615
Utz Brands
UTZ
$1.19B
| $573K | ﹤0.01% |
+23,118
| New | +$573K |
|
616
Microvast
MVST
$829M
| $572K | ﹤0.01% |
+46,530
| New | +$572K |
|
|
SGEN
617
DELISTED
Seagen Inc. Common Stock
SGEN
| $570K | ﹤0.01% |
4,109
+2,435
| +145% | +$338K |
|
618
FMC
FMC
$4.72B
| $569K | ﹤0.01% |
+5,152
| New | +$569K |
|
619
Caleres
CAL
$531M
| $567K | ﹤0.01% |
26,030
+23,615
| +978% | +$514K |
|
620
Madrigal Pharmaceuticals
MDGL
$9.65B
| $567K | ﹤0.01% |
4,850
| – | – |
|
|
POLY
621
DELISTED
Plantronics, Inc.
POLY
| $564K | ﹤0.01% |
+14,518
| New | +$564K |
|
622
Cincinnati Financial
CINF
$24B
| $563K | ﹤0.01% |
5,462
+3,038
| +125% | +$313K |
|
623
Allot
ALLT
$390M
| $559K | ﹤0.01% |
35,025
+29,132
| +494% | +$465K |
|
624
Revvity
RVTY
$10.1B
| $557K | ﹤0.01% |
4,344
+3,758
| +641% | +$482K |
|
|
HOME
625
DELISTED
At Home Group Inc.
HOME
| $556K | ﹤0.01% |
+19,400
| New | +$556K |
|