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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1951
CALL
CNX Resources
CNX
$4.85B
| $2.01M | ﹤0.01% |
129,300
+6,800
| +6% | +$115K |
|
1952
Take-Two Interactive
TTWO
$43B
| $2.01M | ﹤0.01% |
18,428
-30,871
| -63% | -$3.83M |
|
|
WEBR
1953
PUT
DELISTED
Weber Inc.
WEBR
| $2M | ﹤0.01% |
305,300
+224,400
| +277% | +$1.64M |
|
1954
PUT
Vermilion Energy
VET
$1.73B
| $2M | ﹤0.01% |
93,500
-42,400
| -31% | -$995K |
|
1955
CALL
Leslie's
LESL
$11.6M
| $1.99M | ﹤0.01% |
6,780
+215
| +3% | +$64.6K |
|
1956
CALL
Wingstop
WING
$3.68B
| $1.99M | ﹤0.01% |
15,900
+13,000
| +448% | +$1.55M |
|
1957
PUT
EPAM Systems
EPAM
$4.69B
| $1.99M | ﹤0.01% |
5,500
-93,400
| -94% | -$35.7M |
|
1958
CALL
iRhythm Holdings
IRTC
$3.59B
| $1.99M | ﹤0.01% |
15,900
-23,200
| -59% | -$3.35M |
|
1959
Boot Barn
BOOT
$4.55B
| $1.99M | ﹤0.01% |
+34,024
| New | +$2.28M |
|
1960
CALL
Treace Medical Concepts
TMCI
$259M
| $1.99M | ﹤0.01% |
90,100
-2,500
| -3% | -$48.4K |
|
|
POSH
1961
CALL
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $1.99M | ﹤0.01% |
126,900
+55,400
| +77% | +$660K |
|
|
NEWR
1962
PUT
DELISTED
New Relic, Inc.
NEWR
| $1.99M | ﹤0.01% |
34,600
+8,700
| +34% | +$522K |
|
1963
CALL
Pultegroup
PHM
$24.5B
| $1.98M | ﹤0.01% |
52,900
-10,800
| -17% | -$454K |
|
1964
CALL
Ameren
AEE
$31.5B
| $1.98M | ﹤0.01% |
24,600
+21,600
| +720% | +$1.97M |
|
1965
CALL
Beam Therapeutics
BEAM
$2.58B
| $1.98M | ﹤0.01% |
41,600
+28,100
| +208% | +$1.6M |
|
1966
CALL
System1
SST
$15M
| $1.98M | ﹤0.01% |
31,480
+10,990
| +54% | +$958K |
|
1967
ProShares Ultra Bloomberg Natural Gas
BOIL
$417M
| $1.98M | ﹤0.01% |
184
+119
| +183% | +$1.9M |
|
1968
CALL
Planet Labs
PL
$7.3B
| $1.98M | ﹤0.01% |
364,600
+18,600
| +5% | +$103K |
|
1969
PUT
ING
ING
$93.8B
| $1.97M | ﹤0.01% |
232,300
+148,400
| +177% | +$1.38M |
|
1970
PUT
Insulet
PODD
$11.3B
| $1.97M | ﹤0.01% |
8,600
+6,800
| +378% | +$1.7M |
|
|
SMAR
1971
CALL
DELISTED
Smartsheet Inc.
SMAR
| $1.97M | ﹤0.01% |
57,400
-155,400
| -73% | -$5.27M |
|
1972
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $1.97M | ﹤0.01% |
12,600
-6,300
| -33% | -$1.1M |
|
1973
CALL
Matsons
MATX
$6.37B
| $1.97M | ﹤0.01% |
32,000
+18,400
| +135% | +$1.41M |
|
1974
PUT
Harley-Davidson
HOG
$2.68B
| $1.97M | ﹤0.01% |
56,400
-4,400
| -7% | -$165K |
|
|
GRIN
1975
PUT
DELISTED
Grindrod Shipping Holdings Ltd. Ordinary Shares
GRIN
| $1.96M | ﹤0.01% |
+82,000
| New | +$1.66M |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.