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 | |
|---|---|---|---|---|---|---|
3676
Vuzix
VUZI
$193M
| $443K | ﹤0.01% |
+112,619
| New | +$231K |
|
3677
Intuitive Machines
LUNR
$2.14B
| $442K | ﹤0.01% |
24,394
-352,881
| -94% | -$3.91M |
|
3678
CALL
Liberty Media Series A
FWONA
$22.6B
| $441K | ﹤0.01% |
+4,800
| New | +$373K |
|
3679
PUT
Principal Financial Group
PFG
$24B
| $441K | ﹤0.01% |
5,700
+1,500
| +36% | +$126K |
|
3680
CALL
Eve Holding
EVEX
$860M
| $439K | ﹤0.01% |
80,700
-39,200
| -33% | -$147K |
|
3681
CALL
Pacific Biosciences
PACB
$422M
| $439K | ﹤0.01% |
240,100
-138,500
| -37% | -$270K |
|
3682
PUT
NovoCure
NVCR
$1.97B
| $438K | ﹤0.01% |
14,700
+5,500
| +60% | +$116K |
|
3683
Rexford Industrial Realty
REXR
$8.63B
| $438K | ﹤0.01% |
11,348
+10,198
| +887% | +$438K |
|
3684
PUT
Runway Growth Finance
RWAY
$231M
| $438K | ﹤0.01% |
40,000
+29,400
| +277% | +$307K |
|
3685
PUT
Revolution Medicines
RVMD
$40B
| $437K | ﹤0.01% |
10,000
-27,700
| -73% | -$1.4M |
|
3686
CALL
AudioEye
AEYE
$74.7M
| $436K | ﹤0.01% |
28,700
+12,700
| +79% | +$290K |
|
3687
Braze
BRZE
$2.65B
| $436K | ﹤0.01% |
10,411
-7,023
| -40% | -$255K |
|
3688
CALL
Genworth Financial
GNW
$3.79B
| $436K | ﹤0.01% |
62,500
+16,800
| +37% | +$121K |
|
3689
CALL
Sonos
SONO
$1.87B
| $436K | ﹤0.01% |
29,000
+11,500
| +66% | +$155K |
|
3690
CALL
Tecnoglass
TGLS
$2.01B
| $436K | ﹤0.01% |
5,500
-41,400
| -88% | -$3.15M |
|
3691
CALL
Casey's General Stores
CASY
$31.6B
| $435K | ﹤0.01% |
1,100
-13,000
| -92% | -$5.24M |
|
3692
California Resources
CRC
$4.51B
| $434K | ﹤0.01% |
8,365
+5,524
| +194% | +$300K |
|
3693
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.67B
| $434K | ﹤0.01% |
20,300
-3,300
| -14% | -$73.7K |
|
3694
PUT
Everest Group
EG
$15.4B
| $434K | ﹤0.01% |
1,200
+300
| +33% | +$112K |
|
3695
CALL
Compass Minerals
CMP
$1.25B
| $433K | ﹤0.01% |
38,500
+500
| +1% | +$6.53K |
|
3696
PUT
Genius Sports
GENI
$1.94B
| $433K | ﹤0.01% |
50,100
+11,200
| +29% | +$93.5K |
|
3697
CALL
Zevia
ZVIA
$113M
| $433K | ﹤0.01% |
103,500
+88,000
| +568% | +$179K |
|
3698
PUT
Harmonic Inc
HLIT
$1.23B
| $432K | ﹤0.01% |
32,700
+2,400
| +8% | +$31.3K |
|
3699
Coursera
COUR
$1.61B
| $431K | ﹤0.01% |
50,807
-693
| -1% | -$5.35K |
|
3700
CALL
Edison International
EIX
$30.3B
| $431K | ﹤0.01% |
5,400
-7,900
| -59% | -$660K |
|
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.