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 | |
|---|---|---|---|---|---|---|
|
TEM
2276
Tempus AI
TEM
$7.69B
| $1.82M | ﹤0.01% |
54,012
+46,416
| +611% | +$2.3M |
|
|
LAZR
2277
PUT
DELISTED
Luminar Technologies
LAZR
| $1.82M | ﹤0.01% |
338,600
+311,067
| +1,130% | +$3.29M |
|
2278
PUT
Macerich
MAC
$7.32B
| $1.82M | ﹤0.01% |
91,300
-166,500
| -65% | -$3.25M |
|
2279
Diageo
DEO
$46.2B
| $1.82M | ﹤0.01% |
+14,294
| New | +$1.82M |
|
2280
PUT
Amer Sports
AS
$19.7B
| $1.82M | ﹤0.01% |
65,000
+63,600
| +4,543% | +$1.4M |
|
2281
PUT
Comstock Resources
CRK
$3.97B
| $1.81M | ﹤0.01% |
99,600
+12,000
| +14% | +$166K |
|
2282
CALL
Ionis Pharmaceuticals
IONS
$9.35B
| $1.81M | ﹤0.01% |
51,700
+26,500
| +105% | +$991K |
|
2283
CALL
Lantheus
LNTH
$6.82B
| $1.81M | ﹤0.01% |
20,200
-27,700
| -58% | -$2.7M |
|
2284
PUT
Helen of Troy
HELE
$663M
| $1.81M | ﹤0.01% |
30,200
-24,400
| -45% | -$1.62M |
|
2285
Texas Roadhouse
TXRH
$12.7B
| $1.8M | ﹤0.01% |
+10,007
| New | +$1.88M |
|
2286
PUT
Evolv Technologies
EVLV
$943M
| $1.8M | ﹤0.01% |
456,900
-383,400
| -46% | -$1.34M |
|
|
KNGS
2287
CALL
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $1.8M | ﹤0.01% |
44,500
+32,500
| +271% | +$939K |
|
2288
CALL
PagerDuty
PD
$700M
| $1.8M | ﹤0.01% |
98,600
+42,600
| +76% | +$817K |
|
2289
CALL
Green Plains
GPRE
$1.19B
| $1.8M | ﹤0.01% |
189,800
+23,800
| +14% | +$268K |
|
2290
PUT
Starwood Property Trust
STWD
$6.12B
| $1.8M | ﹤0.01% |
94,900
-103,400
| -52% | -$2.05M |
|
2291
CALL
Thomson Reuters
TRI
$39.4B
| $1.8M | ﹤0.01% |
11,027
+8,959
| +433% | +$1.51M |
|
2292
PUT
CRH
CRH
$66.7B
| $1.79M | ﹤0.01% |
19,400
+10,200
| +111% | +$982K |
|
2293
KBR
KBR
$4.68B
| $1.79M | ﹤0.01% |
30,958
+4,712
| +18% | +$301K |
|
2294
CALL
Warrior Met Coal
HCC
$4.23B
| $1.79M | ﹤0.01% |
33,000
-19,300
| -37% | -$1.23M |
|
2295
CALL
PVH
PVH
$3.71B
| $1.79M | ﹤0.01% |
16,900
-3,600
| -18% | -$369K |
|
2296
PUT
Copa Holdings
CPA
$5.56B
| $1.78M | ﹤0.01% |
20,300
+10,200
| +101% | +$967K |
|
2297
Recursion Pharmaceuticals
RXRX
$1.57B
| $1.78M | ﹤0.01% |
263,372
-21,341
| -7% | -$143K |
|
|
NSLR
2298
PUT
Neostellar Capital Corp
NSLR
$262M
| $1.78M | ﹤0.01% |
+302,800
| New | +$1.55M |
|
|
SKX
2299
CALL
DELISTED
Skechers
SKX
| $1.77M | ﹤0.01% |
26,400
-9,500
| -26% | -$616K |
|
2300
PUT
Ingles Markets
IMKTA
$1.63B
| $1.77M | ﹤0.01% |
27,500
+27,400
| +27,400% | +$1.84M |
|
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.