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 | |
|---|---|---|---|---|---|---|
|
1
SPDR Dow Jones Industrial Average ETF Trust
DIA
$39.9B
| $32.3M | 0.06% | 97,753 +97,303 | +21,623% | +$32.1M |
|
|
PARA
2
DELISTED
Paramount Global Class B
PARA
| $27M | 0.05% | 597,826 +516,407 | +634% | +$23.3M |
|
3
Strategy Inc Common Stock Class A
MSTR
$94.8B
| $24.2M | 0.04% | 35,716 +8,106 | +29% | +$5.5M |
|
4
XPeng
XPEV
$20B
| $20.4M | 0.04% | 558,889 +152,618 | +38% | +$5.57M |
|
5
Lam Research
LRCX
$127B
| $19.8M | 0.04% | 33,347 +21,125 | +173% | +$12.6M |
|
6
Marathon Digital Holdings
MARA
$5.92B
| $18.7M | 0.03% | 390,368 +282,342 | +261% | +$13.6M |
|
|
7
Pinduoduo
PDD
$171B
| $18.3M | 0.03% | 136,673 +128,860 | +1,649% | +$17.3M |
|
8
Citigroup
C
$178B
| $17.5M | 0.03% | 239,907 +112,333 | +88% | +$8.17M |
|
|
9
Pfizer
PFE
$141B
| $16.8M | 0.03% | +464,628 | New | +$16.8M |
|
|
10
American Airlines Group
AAL
$8.82B
| $15.1M | 0.03% | 630,880 +607,790 | +2,632% | +$14.5M |
|
11
United Airlines
UAL
$34B
| $14.3M | 0.03% | 248,710 +248,610 | +248,610% | +$14.3M |
|
12
Teladoc Health
TDOC
$1.37B
| $14.3M | 0.03% | 78,708 +29,145 | +59% | +$5.3M |
|
13
Norwegian Cruise Line
NCLH
$11.2B
| $14M | 0.03% | 508,323 +214,676 | +73% | +$5.92M |
|
|
14
Amazon
AMZN
$2.44T
| $12.7M | 0.02% | 4,100 -20,818 | -84% | -$64.4M |
|
15
Salesforce
CRM
$245B
| $12.5M | 0.02% | 58,967 +35,063 | +147% | +$7.43M |
|
16
DocuSign
DOCU
$15.5B
| $12.3M | 0.02% | +60,689 | New | +$12.3M |
|
17
Shopify
SHOP
$184B
| $12.2M | 0.02% | 11,007 +3,069 | +39% | +$3.4M |
|
|
X
18
DELISTED
US Steel
X
| $11.7M | 0.02% | 445,988 +379,158 | +567% | +$9.92M |
|
19
Plug Power
PLUG
$1.81B
| $11.3M | 0.02% | 316,130 +242,868 | +332% | +$8.7M |
|
20
Boeing
BA
$177B
| $11.2M | 0.02% | 44,059 -34,197 | -44% | -$8.71M |
|
21
Futu Holdings
FUTU
$25.8B
| $11.2M | 0.02% | 70,525 +28,526 | +68% | +$4.53M |
|
22
DraftKings
DKNG
$23.8B
| $10.7M | 0.02% | 174,874 +174,804 | +249,720% | +$10.7M |
|
23
Altria Group
MO
$113B
| $10.5M | 0.02% | 204,538 +64,767 | +46% | +$3.31M |
|
24
Bilibili
BILI
$9.6B
| $10.3M | 0.02% | +96,362 | New | +$10.3M |
|
25
Applied Materials
AMAT
$128B
| $10.2M | 0.02% | +76,134 | New | +$10.2M |
|