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 | |
|---|---|---|---|---|---|---|
801
CALL
Philip Morris
PM
$301B
| $12.2M | 0.01% |
125,500
-160,400
| -56% | -$16M |
|
802
PUT
Keurig Dr Pepper
KDP
$40.7B
| $12.2M | 0.01% |
345,700
+301,300
| +679% | +$10.6M |
|
803
PUT
GSK
GSK
$101B
| $12.1M | 0.01% |
359,900
-185,400
| -34% | -$6.49M |
|
804
CALL
Teladoc Health
TDOC
$1.56B
| $12.1M | 0.01% |
467,400
-406,300
| -47% | -$10.9M |
|
805
CALL
Invitation Homes
INVH
$17.7B
| $12.1M | 0.01% |
387,600
+329,900
| +572% | +$10.3M |
|
806
CALL
Paychex
PAYX
$39.2B
| $12.1M | 0.01% |
105,500
-48,300
| -31% | -$5.5M |
|
807
CALL
S&P Global
SPGI
$124B
| $12.1M | 0.01% |
35,000
-39,600
| -53% | -$13.9M |
|
|
EXE
808
CALL
Expand Energy Corp
EXE
$22.5B
| $12M | 0.01% |
158,000
+80,700
| +104% | +$6.64M |
|
809
CALL
SAP
SAP
$170B
| $12M | 0.01% |
94,500
-9,200
| -9% | -$1.08M |
|
810
Diamondback Energy
FANG
$58.7B
| $11.9M | 0.01% |
87,873
+86,123
| +4,921% | +$12M |
|
811
Snowflake
SNOW
$90.6B
| $11.9M | 0.01% |
76,852
+75,752
| +6,887% | +$11.1M |
|
812
C3.ai
AI
$1.24B
| $11.8M | 0.01% |
352,231
+351,521
| +49,510% | +$7.2M |
|
813
CALL
Macy's
M
$6.12B
| $11.8M | 0.01% |
674,800
-176,000
| -21% | -$3.72M |
|
814
PUT
HSBC
HSBC
$349B
| $11.8M | 0.01% |
345,400
-72,500
| -17% | -$2.6M |
|
|
APLS
815
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $11.8M | 0.01% |
178,200
+27,700
| +18% | +$1.6M |
|
816
Nike
NKE
$60.9B
| $11.7M | 0.01% |
+95,509
| New | +$11.7M |
|
817
PUT
Equinix
EQIX
$102B
| $11.7M | 0.01% |
16,200
+9,000
| +125% | +$6.34M |
|
818
CALL
GoDaddy
GDDY
$11.5B
| $11.7M | 0.01% |
150,200
+55,500
| +59% | +$4.28M |
|
819
PUT
Phillips 66
PSX
$85.5B
| $11.6M | 0.01% |
114,900
-92,000
| -44% | -$9.35M |
|
820
CALL
Trip.com Group
TCOM
$27B
| $11.6M | 0.01% |
309,200
+109,300
| +55% | +$4.06M |
|
821
PUT
AstraZeneca
AZN
$262B
| $11.6M | 0.01% |
83,850
-76,350
| -48% | -$10.3M |
|
822
CALL
CSX Corp
CSX
$98B
| $11.6M | 0.01% |
386,700
+131,800
| +52% | +$4.05M |
|
823
PUT
KKR & Co
KKR
$85.8B
| $11.5M | 0.01% |
219,900
-76,600
| -26% | -$4.11M |
|
824
PUT
Ross Stores
ROST
$75.5B
| $11.5M | 0.01% |
108,300
+86,300
| +392% | +$9.69M |
|
825
State Street SPDR S&P Regional Banking ETF
KRE
$4.77B
| $11.5M | 0.01% |
+261,312
| New | +$14.8M |
|
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.