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 | Miscellaneous | 98.51% |
| 2 | Technology | 0.42% |
| 3 | Consumer Discretionary | 0.2% |
| 4 | Healthcare | 0.17% |
| 5 | Industrials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1876
PUT
Cullen/Frost Bankers
CFR
$10.2B
| $2.17M | ﹤0.01% |
20,600
-4,100
| -17% | -$511K |
|
|
ISEE
1877
CALL
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $2.17M | ﹤0.01% |
89,200
-18,500
| -17% | -$405K |
|
1878
PUT
Conagra Brands
CAG
$7.3B
| $2.16M | ﹤0.01% |
57,600
+22,800
| +66% | +$845K |
|
1879
Vanguard S&P 500 Growth ETF
VOOG
$27.2B
| $2.16M | ﹤0.01% |
56,208
+1,998
| +4% | +$73.4K |
|
1880
PUT
Deckers Outdoor
DECK
$11.3B
| $2.16M | ﹤0.01% |
28,800
-137,400
| -83% | -$9.6M |
|
1881
CALL
Boyd Gaming
BYD
$5.6B
| $2.15M | ﹤0.01% |
33,600
+700
| +2% | +$43.3K |
|
1882
CALL
Ferguson
FERG
$44.2B
| $2.15M | ﹤0.01% |
16,100
+4,000
| +33% | +$556K |
|
1883
PUT
Vertiv
VRT
$113B
| $2.15M | ﹤0.01% |
150,300
+146,700
| +4,075% | +$2.15M |
|
1884
BJs Wholesale Club
BJ
$11.4B
| $2.15M | ﹤0.01% |
+28,252
| New | +$2.05M |
|
1885
PUT
Nu Holdings
NU
$74.5B
| $2.15M | ﹤0.01% |
451,600
+208,200
| +86% | +$928K |
|
1886
CALL
Protagonist Therapeutics
PTGX
$9.51B
| $2.15M | ﹤0.01% |
93,400
+65,200
| +231% | +$1.09M |
|
1887
CALL
Toast
TOST
$19.1B
| $2.15M | ﹤0.01% |
121,000
-198,700
| -62% | -$3.92M |
|
|
CNR
1888
CALL
Core Natural Resources Inc
CNR
$4.96B
| $2.14M | ﹤0.01% |
36,800
-56,200
| -60% | -$3.2M |
|
1889
CALL
Kimbell Royalty Partners
KRP
$1.52B
| $2.14M | ﹤0.01% |
140,700
-130,500
| -48% | -$2.04M |
|
1890
CALL
OR Royalties Inc
OR
$6.97B
| $2.14M | ﹤0.01% |
199,700
+92,400
| +86% | +$1.25M |
|
1891
CALL
Impinj
PI
$5.28B
| $2.14M | ﹤0.01% |
15,800
-35,500
| -69% | -$4.53M |
|
1892
BridgeBio Pharma
BBIO
$14.5B
| $2.14M | ﹤0.01% |
+129,127
| New | +$1.51M |
|
|
VTLE
1893
PUT
DELISTED
Vital Energy
VTLE
| $2.14M | ﹤0.01% |
47,000
-1,300
| -3% | -$64.9K |
|
|
GRMN
1894
CALL
Garmin
GRMN
$53.7B
| $2.14M | ﹤0.01% |
21,200
-5,100
| -19% | -$498K |
|
1895
Jabil
JBL
$32.6B
| $2.14M | ﹤0.01% |
24,234
+10,068
| +71% | +$811K |
|
1896
PUT
Oneok
OKE
$61.2B
| $2.13M | ﹤0.01% |
33,600
-20,300
| -38% | -$1.35M |
|
1897
Robinhood
HOOD
$109B
| $2.13M | ﹤0.01% |
219,722
+16,010
| +8% | +$153K |
|
1898
CALL
CVR Partners
UAN
$1.4B
| $2.13M | ﹤0.01% |
23,900
+4,900
| +26% | +$477K |
|
1899
CALL
Black Stone Minerals
BSM
$3.15B
| $2.13M | ﹤0.01% |
135,700
+107,800
| +386% | +$1.69M |
|
1900
CALL
Voya Financial
VOYA
$9.36B
| $2.13M | ﹤0.01% |
29,800
-49,000
| -62% | -$3.43M |
|
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's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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.