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 | |
|---|---|---|---|---|---|---|
3551
CALL
Global Water Resources
GWRS
$211M
| $493K | ﹤0.01% |
42,900
+42,500
| +10,625% | +$533K |
|
3552
SandRidge Energy
SD
$496M
| $493K | ﹤0.01% |
+42,152
| New | +$487K |
|
|
MTTR
3553
CALL
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $493K | ﹤0.01% |
104,200
+9,900
| +10% | +$47K |
|
3554
CALL
VinFast Auto
VFS
$6.9B
| $492K | ﹤0.01% |
122,300
+1,000
| +0.8% | +$4.05K |
|
3555
CALL
Green Brick Partners
GRBK
$3.12B
| $491K | ﹤0.01% |
8,700
+5,300
| +156% | +$376K |
|
3556
CALL
Huntington Ingalls Industries
HII
$11.4B
| $491K | ﹤0.01% |
2,600
-3,600
| -58% | -$778K |
|
3557
Medpace
MEDP
$16.5B
| $491K | ﹤0.01% |
+1,478
| New | +$501K |
|
3558
CALL
National CineMedia
NCMI
$362M
| $491K | ﹤0.01% |
74,000
-67,900
| -48% | -$467K |
|
3559
AeroVironment
AVAV
$7.81B
| $490K | ﹤0.01% |
+3,189
| New | +$624K |
|
|
HSAI
3560
CALL
Hesai Group
HSAI
$2.42B
| $490K | ﹤0.01% |
35,500
+9,500
| +37% | +$66.9K |
|
3561
CALL
Fulcrum Therapeutics
FULC
$249M
| $489K | ﹤0.01% |
104,200
-139,100
| -57% | -$513K |
|
3562
CALL
NET Power
NPWR
$128M
| $489K | ﹤0.01% |
46,200
+24,500
| +113% | +$240K |
|
3563
PUT
AvePoint
AVPT
$2.72B
| $488K | ﹤0.01% |
29,600
-153,500
| -84% | -$2.33M |
|
3564
CALL
Huazhu Hotels Group
HTHT
$12.9B
| $488K | ﹤0.01% |
14,800
-27,500
| -65% | -$995K |
|
3565
PUT
Flex
FLEX
$42.5B
| $487K | ﹤0.01% |
14,700
-6,800
| -32% | -$252K |
|
3566
Qiagen
QGEN
$8.47B
| $487K | ﹤0.01% |
+10,640
| New | +$476K |
|
3567
PUT
Interparfums
IPAR
$3.99B
| $486K | ﹤0.01% |
3,700
+1,900
| +106% | +$244K |
|
3568
Progyny
PGNY
$2.47B
| $486K | ﹤0.01% |
28,200
+27,968
| +12,055% | +$434K |
|
3569
Humacyte
HUMA
$182M
| $485K | ﹤0.01% |
96,175
-34,532
| -26% | -$171K |
|
3570
PUT
Perion Network
PERI
$371M
| $485K | ﹤0.01% |
57,300
+39,700
| +226% | +$334K |
|
3571
PUT
Vitesse Energy
VTS
$636M
| $485K | ﹤0.01% |
19,400
+5,200
| +37% | +$136K |
|
3572
Copa Holdings
CPA
$5.65B
| $484K | ﹤0.01% |
5,518
+1,820
| +49% | +$173K |
|
3573
Eton Pharmaceutcials
ETON
$1.16B
| $484K | ﹤0.01% |
+36,376
| New | +$369K |
|
3574
CALL
Sana Biotechnology
SANA
$913M
| $484K | ﹤0.01% |
297,100
-400
| -0.1% | -$1.19K |
|
3575
PUT
SSR Mining
SSRM
$5.45B
| $484K | ﹤0.01% |
69,600
-9,300
| -12% | -$57.9K |
|
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.