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 | |
|---|---|---|---|---|---|---|
1901
CALL
Incyte
INCY
$23.5B
| $2.85M | ﹤0.01% |
41,200
+9,500
| +30% | +$677K |
|
1902
CALL
Altimmune
ALT
$539M
| $2.84M | ﹤0.01% |
394,500
+61,000
| +18% | +$466K |
|
1903
CALL
Olin
OLN
$2.64B
| $2.84M | ﹤0.01% |
84,100
-9,900
| -11% | -$414K |
|
1904
PUT
KBR
KBR
$4.68B
| $2.84M | ﹤0.01% |
49,000
+33,500
| +216% | +$2.14M |
|
1905
CALL
SBA Communications
SBAC
$18.4B
| $2.83M | ﹤0.01% |
13,900
+10,200
| +276% | +$2.3M |
|
1906
PUT
Raymond James Financial
RJF
$32.5B
| $2.83M | ﹤0.01% |
18,200
+14,900
| +452% | +$2.25M |
|
1907
PUT
ArcelorMittal
MT
$50.4B
| $2.82M | ﹤0.01% |
122,100
+3,100
| +3% | +$76.4K |
|
1908
PUT
Harley-Davidson
HOG
$2.68B
| $2.82M | ﹤0.01% |
93,700
-15,900
| -15% | -$527K |
|
1909
PUT
Diageo
DEO
$46.2B
| $2.82M | ﹤0.01% |
22,200
+900
| +4% | +$115K |
|
1910
PUT
Virtu Financial
VIRT
$5.2B
| $2.82M | ﹤0.01% |
79,100
+3,300
| +4% | +$114K |
|
1911
Enlight Renewable Energy
ENLT
$12.2B
| $2.82M | ﹤0.01% |
+163,608
| New | +$2.63M |
|
1912
CALL
Itaú Unibanco
ITUB
$91.3B
| $2.82M | ﹤0.01% |
643,771
+8,045
| +1% | +$41.4K |
|
1913
CALL
NovoCure
NVCR
$2.04B
| $2.8M | ﹤0.01% |
94,000
+14,900
| +19% | +$315K |
|
|
CYBR
1914
CALL
DELISTED
CyberArk
CYBR
| $2.8M | ﹤0.01% |
8,400
-31,500
| -79% | -$9.57M |
|
|
SLNO
1915
CALL
DELISTED
Soleno Therapeutics
SLNO
| $2.79M | ﹤0.01% |
62,200
+36,500
| +142% | +$1.89M |
|
|
BLUE
1916
PUT
DELISTED
bluebird bio
BLUE
| $2.79M | ﹤0.01% |
334,600
+318,250
| +1,946% | +$2.78M |
|
1917
Dollar General
DG
$25.9B
| $2.79M | ﹤0.01% |
36,794
+35,339
| +2,429% | +$2.78M |
|
|
1918
PUT
Enlight Renewable Energy
ENLT
$12.2B
| $2.79M | ﹤0.01% |
+161,700
| New | +$2.6M |
|
1919
PUT
Eos Energy Enterprises
EOSE
$1.23B
| $2.79M | ﹤0.01% |
573,300
+275,000
| +92% | +$890K |
|
|
K
1920
PUT
DELISTED
Kellanova
K
| $2.79M | ﹤0.01% |
52,200
-31,100
| -37% | -$2.51M |
|
1921
PUT
Joby Aviation
JOBY
$6.82B
| $2.79M | ﹤0.01% |
342,600
+178,200
| +108% | +$1.18M |
|
1922
CALL
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$247M
| $2.78M | ﹤0.01% |
126,600
+59,800
| +90% | +$1.45M |
|
1923
CALL
Aecom
ACM
$9.07B
| $2.78M | ﹤0.01% |
26,000
+7,200
| +38% | +$786K |
|
1924
CALL
FirstEnergy
FE
$28.9B
| $2.78M | ﹤0.01% |
69,800
-55,700
| -44% | -$2.33M |
|
1925
CALL
OneMain Financial
OMF
$6.9B
| $2.77M | ﹤0.01% |
53,200
-23,700
| -31% | -$1.23M |
|
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.