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 | |
|---|---|---|---|---|---|---|
26
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $622M | 0.55% |
1,869,000
+416,100
| +29% | +$138M |
|
27
CALL
Netflix
NFLX
$286B
| $605M | 0.53% |
17,519,000
-3,683,000
| -17% | -$122M |
|
|
28
PUT
Amazon
AMZN
$2.66T
| $573M | 0.5% |
5,546,200
-3,384,500
| -38% | -$327M |
|
29
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $545M | 0.48% |
7,865,700
+717,000
| +10% | +$21.7M |
|
|
30
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $481M | 0.42% |
5,456,000
+996,200
| +22% | +$30.1M |
|
31
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $459M | 0.4% |
8,801,600
+3,944,900
| +81% | +$441M |
|
32
CALL
JPMorgan Chase
JPM
$918B
| $449M | 0.39% |
3,455,500
+1,115,900
| +48% | +$153M |
|
33
PUT
Advanced Micro Devices
AMD
$888B
| $433M | 0.38% |
4,413,700
-49,600
| -1% | -$4.04M |
|
|
34
CALL
Advanced Micro Devices
AMD
$888B
| $411M | 0.36% |
4,191,900
-564,000
| -12% | -$45.9M |
|
|
35
PUT
JPMorgan Chase
JPM
$918B
| $358M | 0.31% |
2,745,400
+789,400
| +40% | +$108M |
|
36
PUT
Salesforce
CRM
$139B
| $343M | 0.3% |
1,719,300
+338,700
| +25% | +$57.2M |
|
37
CALL
Home Depot
HD
$331B
| $330M | 0.29% |
1,117,000
+602,300
| +117% | +$185M |
|
38
PUT
Alibaba
BABA
$283B
| $328M | 0.29% |
3,214,600
+858,200
| +36% | +$86M |
|
|
39
CALL
Salesforce
CRM
$139B
| $323M | 0.28% |
1,615,200
+462,700
| +40% | +$78.2M |
|
|
40
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $320M | 0.28% |
962,300
-562,200
| -37% | -$187M |
|
41
CALL
iShares Silver Trust
SLV
$28.4B
| $304M | 0.27% |
13,725,400
+3,132,100
| +30% | +$64.9M |
|
|
42
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $293M | 0.26% |
5,739,500
+2,539,500
| +79% | +$284M |
|
43
PUT
Goldman Sachs
GS
$320B
| $278M | 0.24% |
851,300
+186,300
| +28% | +$64.9M |
|
44
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $278M | 0.24% |
3,877,100
-172,900
| -4% | -$11.1M |
|
45
PUT
Broadcom
AVGO
$1.84T
| $265M | 0.23% |
4,124,000
+308,000
| +8% | +$18.5M |
|
|
46
CALL
Goldman Sachs
GS
$320B
| $251M | 0.22% |
766,600
+234,800
| +44% | +$81.7M |
|
47
PUT
First Solar
FSLR
$22.1B
| $243M | 0.21% |
1,116,200
-35,200
| -3% | -$6.43M |
|
|
48
PUT
Home Depot
HD
$331B
| $241M | 0.21% |
866,900
+160,900
| +23% | +$49.3M |
|
49
CALL
Boeing
BA
$161B
| $239M | 0.21% |
1,127,100
-326,900
| -22% | -$67.9M |
|
|
50
CALL
Walmart Inc
WMT
$878B
| $222M | 0.19% |
4,510,500
+614,100
| +16% | +$29.1M |
|
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 3,665 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 1,729 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.