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 | |
|---|---|---|---|---|---|---|
2701
CALL
Mattel
MAT
$4.17B
| $1.15M | ﹤0.01% |
65,000
-85,800
| -57% | -$1.62M |
|
2702
CALL
Braze
BRZE
$2.45B
| $1.15M | ﹤0.01% |
27,500
+1,300
| +5% | +$47.2K |
|
2703
Hasbro
HAS
$12.6B
| $1.15M | ﹤0.01% |
+20,598
| New | +$1.34M |
|
2704
CALL
NOV
NOV
$7.45B
| $1.15M | ﹤0.01% |
78,900
+67,700
| +604% | +$1.06M |
|
2705
PUT
StoneCo
STNE
$2.62B
| $1.15M | ﹤0.01% |
144,500
-226,300
| -61% | -$2.29M |
|
2706
State Street SPDR S&P Regional Banking ETF
KRE
$4.86B
| $1.15M | ﹤0.01% |
+19,067
| New | +$1.18M |
|
2707
CALL
Allegiant Air
ALGT
$2.64B
| $1.15M | ﹤0.01% |
12,200
-1,600
| -12% | -$117K |
|
|
DFTX
2708
CALL
Definium Therapeutics
DFTX
$5.73B
| $1.15M | ﹤0.01% |
164,900
+75,400
| +84% | +$519K |
|
2709
CALL
Impinj
PI
$3.89B
| $1.15M | ﹤0.01% |
7,900
+2,600
| +49% | +$493K |
|
2710
Freshworks
FRSH
$2.84B
| $1.14M | ﹤0.01% |
70,741
+54,409
| +333% | +$773K |
|
2711
CALL
InterDigital
IDCC
$6.68B
| $1.14M | ﹤0.01% |
5,900
-4,900
| -45% | -$857K |
|
2712
CALL
Canadian Solar
CSIQ
$906M
| $1.14M | ﹤0.01% |
102,600
-12,400
| -11% | -$160K |
|
2713
CALL
UGI
UGI
$8B
| $1.14M | ﹤0.01% |
40,400
+4,100
| +11% | +$106K |
|
2714
CALL
Saia
SAIA
$11.3B
| $1.14M | ﹤0.01% |
2,500
+2,000
| +400% | +$989K |
|
2715
PUT
Crescent Energy
CRGY
$3.72B
| $1.14M | ﹤0.01% |
77,900
+25,800
| +50% | +$350K |
|
2716
Groupon
GRPN
$980M
| $1.14M | ﹤0.01% |
93,678
-91,279
| -49% | -$958K |
|
2717
CALL
American Eagle Outfitters
AEO
$2.85B
| $1.14M | ﹤0.01% |
68,200
+7,000
| +11% | +$132K |
|
2718
Alnylam Pharmaceuticals
ALNY
$36.3B
| $1.14M | ﹤0.01% |
+4,829
| New | +$1.27M |
|
2719
Coupang
CPNG
$27.8B
| $1.14M | ﹤0.01% |
51,659
-66,244
| -56% | -$1.63M |
|
2720
CALL
Full Truck Alliance
YMM
$9.56B
| $1.13M | ﹤0.01% |
104,800
+49,100
| +88% | +$479K |
|
2721
Avis
CAR
$5.63B
| $1.13M | ﹤0.01% |
14,034
+27
| +0.2% | +$2.46K |
|
|
PBT
2722
CALL
Permian Basin Royalty Trust
PBT
$1.36B
| $1.13M | ﹤0.01% |
102,000
+94,800
| +1,317% | +$1.14M |
|
2723
PUT
Amplify Online Retail ETF
IBUY
$106M
| $1.13M | ﹤0.01% |
121,000
-255,300
| -68% | -$16.5M |
|
2724
CALL
iShares Convertible Bond ETF
ICVT
$7.23B
| $1.12M | ﹤0.01% |
38,800
-13,500
| -26% | -$1.16M |
|
2725
GE Vernova
GEV
$270B
| $1.12M | ﹤0.01% |
+3,410
| New | +$1.07M |
|
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.