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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4901
HDFC Bank
HDB
$119B
| $125K | ﹤0.01% |
+3,762
| New | +$126K |
|
4902
CALL
Inovio Pharmaceuticals
INO
$93M
| $125K | ﹤0.01% |
12,783
+750
| +6% | +$12.8K |
|
4903
PUT
Kinetik
KNTK
$4.16B
| $125K | ﹤0.01% |
+4,000
| New | +$123K |
|
|
NAAS
4904
NaaS Technology Inc
NAAS
$58.7M
| $125K | ﹤0.01% |
+37
| New | +$61.9K |
|
4905
CALL
POSCO
PKX
$17.1B
| $125K | ﹤0.01% |
1,800
+1,500
| +500% | +$92.4K |
|
4906
CALL
TD Synnex
SNX
$20.4B
| $125K | ﹤0.01% |
1,300
-1,900
| -59% | -$189K |
|
4907
CALL
Symbotic
SYM
$5.43B
| $125K | ﹤0.01% |
5,500
-5,700
| -51% | -$95.3K |
|
4908
CALL
Travel + Leisure Co
TNL
$4.58B
| $125K | ﹤0.01% |
3,200
-16,400
| -84% | -$662K |
|
|
NAPA
4909
CALL
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $125K | ﹤0.01% |
7,900
+5,000
| +172% | +$78.6K |
|
|
SYNH
4910
DELISTED
Syneos Health, Inc. Class A Common Stock
SYNH
| $125K | ﹤0.01% |
3,537
-49,327
| -93% | -$1.79M |
|
|
HEXO
4911
CALL
DELISTED
HEXO Corp. Common Shares
HEXO
| $125K | ﹤0.01% |
93,400
-77,300
| -45% | -$113K |
|
4912
PUT
CONMED
CNMD
$1.49B
| $124K | ﹤0.01% |
1,200
-3,000
| -71% | -$290K |
|
4913
CALL
KLX Energy Services
KLXE
$36M
| $124K | ﹤0.01% |
10,700
-1,600
| -13% | -$21.8K |
|
4914
PUT
Lloyds Banking Group
LYG
$90B
| $124K | ﹤0.01% |
53,600
-126,000
| -70% | -$305K |
|
4915
CALL
Mueller Industries
MLI
$14.7B
| $124K | ﹤0.01% |
6,800
+2,400
| +55% | +$41.9K |
|
|
RDUS
4916
PUT
DELISTED
Radius Recycling
RDUS
| $124K | ﹤0.01% |
4,000
+3,300
| +471% | +$107K |
|
4917
PUT
Senseonics Holdings Inc
SENS
$409M
| $124K | ﹤0.01% |
8,740
-1,515
| -15% | -$30.4K |
|
4918
CALL
Vista Energy
VIST
$7.33B
| $124K | ﹤0.01% |
6,300
-53,000
| -89% | -$908K |
|
|
AAMI
4919
CALL
Acadian Asset Management
AAMI
$3.31B
| $124K | ﹤0.01% |
5,300
-200
| -4% | -$4.71K |
|
|
OSG
4920
CALL
DELISTED
Overseas Shipholding Group Inc.
OSG
| $124K | ﹤0.01% |
31,900
-56,600
| -64% | -$204K |
|
|
CONX
4921
DELISTED
CONX Corp. Class A Common Stock
CONX
| $124K | ﹤0.01% |
12,161
+12,160
| +1,216,000% | +$123K |
|
|
ALTU
4922
DELISTED
Altitude Acquisition Corp
ALTU
| $124K | ﹤0.01% |
12,248
-2,619
| -18% | -$26.3K |
|
4923
Caleres
CAL
$461M
| $123K | ﹤0.01% |
5,719
+4,869
| +573% | +$117K |
|
4924
Liberty Media Series C
FWONK
$26B
| $123K | ﹤0.01% |
+1,709
| New | +$116K |
|
|
LPRO
4925
DELISTED
Open Lending Corp
LPRO
| $123K | ﹤0.01% |
+17,503
| New | +$136K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,663 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,728 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.