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 | |
|---|---|---|---|---|---|---|
|
SILV
2051
CALL
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $2.34M | ﹤0.01% |
257,300
+61,200
| +31% | +$620K |
|
2052
PUT
Roper Technologies
ROP
$36.3B
| $2.34M | ﹤0.01% |
4,500
-1,300
| -22% | -$714K |
|
2053
ProShares UltraPro Dow 30
UDOW
$849M
| $2.34M | ﹤0.01% |
49,464
+38,318
| +344% | +$1.94M |
|
2054
CALL
Cheesecake Factory
CAKE
$4.21B
| $2.33M | ﹤0.01% |
49,200
+37,900
| +335% | +$1.74M |
|
2055
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $2.33M | ﹤0.01% |
30,600
-72,200
| -70% | -$5.67M |
|
|
AZEK
2056
CALL
DELISTED
The AZEK Co
AZEK
| $2.33M | ﹤0.01% |
49,100
+30,900
| +170% | +$1.48M |
|
2057
CALL
TE Connectivity
TEL
$58.8B
| $2.33M | ﹤0.01% |
16,300
-38,800
| -70% | -$5.78M |
|
2058
CALL
Telephone and Data Systems
TDS
$3.91B
| $2.33M | ﹤0.01% |
68,300
-78,100
| -53% | -$2.38M |
|
2059
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $2.33M | ﹤0.01% |
13,200
-27,500
| -68% | -$5.6M |
|
2060
CALL
Alliance Resource Partners
ARLP
$3.18B
| $2.33M | ﹤0.01% |
88,500
-41,800
| -32% | -$1.09M |
|
2061
PUT
Warby Parker
WRBY
$3.01B
| $2.33M | ﹤0.01% |
96,100
+4,100
| +4% | +$83.8K |
|
2062
iShares MSCI South Korea ETF
EWY
$21.7B
| $2.33M | ﹤0.01% |
45,696
+36,441
| +394% | +$2.12M |
|
2063
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $2.32M | ﹤0.01% |
17,300
-600
| -3% | -$78.8K |
|
|
IRBT
2064
CALL
DELISTED
iRobot
IRBT
| $2.32M | ﹤0.01% |
299,400
+14,200
| +5% | +$114K |
|
2065
PUT
UBS Group
UBS
$170B
| $2.32M | ﹤0.01% |
109,200
-75,200
| -41% | -$2.38M |
|
2066
PUT
Edgewise Therapeutics
EWTX
$4.39B
| $2.31M | ﹤0.01% |
86,700
+16,800
| +24% | +$535K |
|
|
JWN
2067
PUT
DELISTED
Nordstrom
JWN
| $2.31M | ﹤0.01% |
95,600
-36,800
| -28% | -$850K |
|
2068
CALL
Aspen Aerogels
ASPN
$387M
| $2.31M | ﹤0.01% |
194,200
-1,700
| -0.9% | -$29K |
|
2069
CALL
Gold Fields
GFI
$29.2B
| $2.3M | ﹤0.01% |
174,400
-30,600
| -15% | -$466K |
|
2070
CALL
Applied Industrial Technologies
AIT
$12.8B
| $2.3M | ﹤0.01% |
9,600
-4,600
| -32% | -$1.15M |
|
2071
PUT
Brookfield Renewable
BEPC
$6.12B
| $2.3M | ﹤0.01% |
83,100
+62,800
| +309% | +$1.93M |
|
|
MOMO
2072
CALL
Hello Group
MOMO
$869M
| $2.3M | ﹤0.01% |
326,800
+290,600
| +803% | +$2.06M |
|
2073
Kodak
KODK
$806M
| $2.29M | ﹤0.01% |
349,380
+299,644
| +602% | +$1.7M |
|
2074
CALL
United Therapeutics
UTHR
$26.3B
| $2.29M | ﹤0.01% |
6,500
-3,800
| -37% | -$1.4M |
|
2075
CALL
Eldorado Gold
EGO
$8.31B
| $2.29M | ﹤0.01% |
153,800
+69,000
| +81% | +$1.14M |
|
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.