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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1976
CALL
Innodata
INOD
$1.83B
| $2.6M | ﹤0.01% |
65,700
+20,500
| +45% | +$646K |
|
|
NNE
1977
PUT
Nano Nuclear Energy
NNE
$813M
| $2.6M | ﹤0.01% |
+104,300
| New | +$2.37M |
|
1978
CALL
Central Garden & Pet Co Class A
CENTA
$2.41B
| $2.59M | ﹤0.01% |
66,900
-19,800
| -23% | -$631K |
|
1979
CME Group
CME
$92.2B
| $2.59M | ﹤0.01% |
+11,162
| New | +$2.57M |
|
1980
PUT
Albertsons Companies
ACI
$5.4B
| $2.59M | ﹤0.01% |
132,300
+115,400
| +683% | +$2.19M |
|
1981
PUT
Targa Resources
TRGP
$60.4B
| $2.59M | ﹤0.01% |
14,500
+500
| +4% | +$89.6K |
|
1982
PUT
American Eagle Outfitters
AEO
$2.85B
| $2.58M | ﹤0.01% |
155,000
-80,100
| -34% | -$1.52M |
|
1983
CALL
Transmedics
TMDX
$2.5B
| $2.58M | ﹤0.01% |
41,400
+28,900
| +231% | +$2.69M |
|
1984
PUT
Rambus
RMBS
$10.4B
| $2.58M | ﹤0.01% |
48,800
-32,600
| -40% | -$1.66M |
|
1985
CALL
Conagra Brands
CAG
$7.07B
| $2.58M | ﹤0.01% |
92,900
-119,500
| -56% | -$3.39M |
|
1986
CALL
Yeti Holdings
YETI
$3.82B
| $2.58M | ﹤0.01% |
66,900
+900
| +1% | +$35.8K |
|
1987
Vodafone
VOD
$34.9B
| $2.57M | ﹤0.01% |
302,794
-134,938
| -31% | -$1.23M |
|
1988
CALL
W.P. Carey
WPC
$17.1B
| $2.57M | ﹤0.01% |
52,500
+18,100
| +53% | +$1.03M |
|
1989
PUT
Vipshop
VIPS
$6.84B
| $2.57M | ﹤0.01% |
190,500
-55,600
| -23% | -$798K |
|
1990
PUT
Corteva
CTVA
$59.7B
| $2.56M | ﹤0.01% |
45,000
-15,600
| -26% | -$922K |
|
1991
Sunrun
RUN
$2.37B
| $2.56M | ﹤0.01% |
276,451
+161,117
| +140% | +$2M |
|
1992
PUT
Tilray
TLRY
$479M
| $2.56M | ﹤0.01% |
192,300
-20,360
| -10% | -$299K |
|
|
JPGE
1993
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $2.56M | ﹤0.01% |
44,600
+14,200
| +47% | +$814K |
|
|
UNIT
1994
PUT
Uniti Group
UNIT
$2.63B
| $2.54M | ﹤0.01% |
461,200
-32,700
| -7% | -$186K |
|
1995
CALL
American Superconductor
AMSC
$1.48B
| $2.53M | ﹤0.01% |
102,800
-57,800
| -36% | -$1.59M |
|
1996
CALL
Cracker Barrel
CBRL
$1.2B
| $2.53M | ﹤0.01% |
47,800
-57,900
| -55% | -$2.86M |
|
1997
CALL
Owens Corning
OC
$11.5B
| $2.52M | ﹤0.01% |
14,800
+12,700
| +605% | +$2.37M |
|
1998
PayPal
PYPL
$49.5B
| $2.52M | ﹤0.01% |
29,499
+9,337
| +46% | +$785K |
|
1999
CALL
ADMA Biologics
ADMA
$1.92B
| $2.52M | ﹤0.01% |
146,700
-17,300
| -11% | -$325K |
|
2000
CALL
Powell Industries
POWL
$8.46B
| $2.5M | ﹤0.01% |
33,900
-2,700
| -7% | -$241K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.