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 | |
|---|---|---|---|---|---|---|
|
ECHO
1326
CALL
EchoStar
ECHO
$25.5B
| $6.15M | ﹤0.01% |
268,600
+3,100
| +1% | +$75.1K |
|
1327
PUT
Honda
HMC
$36.5B
| $6.15M | ﹤0.01% |
215,400
+210,600
| +4,388% | +$5.95M |
|
1328
CALL
PTC
PTC
$13.7B
| $6.14M | ﹤0.01% |
33,400
+9,000
| +37% | +$1.71M |
|
1329
PUT
Equinix
EQIX
$107B
| $6.13M | ﹤0.01% |
6,500
-28,100
| -81% | -$25.9M |
|
|
LAZR
1330
CALL
DELISTED
Luminar Technologies
LAZR
| $6.13M | ﹤0.01% |
1,138,900
+1,030,680
| +952% | +$10.9M |
|
1331
PUT
Dave & Buster's
PLAY
$343M
| $6.12M | ﹤0.01% |
209,800
+139,500
| +198% | +$4.85M |
|
1332
CALL
STMicroelectronics
STM
$46B
| $6.11M | ﹤0.01% |
244,700
+27,100
| +12% | +$720K |
|
1333
PUT
Kimberly-Clark
KMB
$36.4B
| $6.11M | ﹤0.01% |
46,600
-23,000
| -33% | -$3.14M |
|
1334
CALL
Shake Shack
SHAK
$2.3B
| $6.1M | ﹤0.01% |
47,000
+16,300
| +53% | +$2M |
|
|
NNE
1335
CALL
Nano Nuclear Energy
NNE
$813M
| $6.09M | ﹤0.01% |
+244,700
| New | +$5.56M |
|
1336
CALL
Westlake Corp
WLK
$9.46B
| $6.09M | ﹤0.01% |
53,100
+2,500
| +5% | +$325K |
|
1337
GE Aerospace
GE
$367B
| $6.08M | ﹤0.01% |
+36,453
| New | +$6.5M |
|
1338
PUT
Royal Gold
RGLD
$17.1B
| $6.08M | ﹤0.01% |
46,100
-23,000
| -33% | -$3.32M |
|
1339
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $6.08M | ﹤0.01% |
65,726
-113,533
| -63% | -$10.7M |
|
1340
PUT
AB InBev
BUD
$158B
| $6.07M | ﹤0.01% |
121,300
-25,000
| -17% | -$1.45M |
|
1341
PUT
Cintas
CTAS
$82.4B
| $6.07M | ﹤0.01% |
33,200
-32,800
| -50% | -$6.9M |
|
1342
PUT
Archer Daniels Midland
ADM
$41.4B
| $6.06M | ﹤0.01% |
119,900
-1,500
| -1% | -$81.2K |
|
1343
CALL
MP Materials
MP
$7.35B
| $6.05M | ﹤0.01% |
387,800
-21,200
| -5% | -$393K |
|
1344
CALL
BJs Wholesale Club
BJ
$11.9B
| $6.01M | ﹤0.01% |
67,300
-39,600
| -37% | -$3.58M |
|
1345
PUT
Valley National Bancorp
VLY
$7.93B
| $6M | ﹤0.01% |
662,700
-629,300
| -49% | -$6.1M |
|
1346
CALL
Citizens Financial Group
CFG
$30.4B
| $6M | ﹤0.01% |
137,200
-19,600
| -13% | -$867K |
|
|
PR
1347
CALL
Permian Resources
PR
$17.9B
| $6M | ﹤0.01% |
417,000
+8,300
| +2% | +$120K |
|
1348
PUT
CNX Resources
CNX
$4.85B
| $6M | ﹤0.01% |
163,500
+154,500
| +1,717% | +$5.69M |
|
1349
PUT
United States Natural Gas Fund
UNG
$470M
| $5.99M | ﹤0.01% |
356,400
-5,300
| -1% | -$75.8K |
|
1350
CALL
Tractor Supply
TSCO
$16.3B
| $5.99M | ﹤0.01% |
112,900
-178,100
| -61% | -$10.1M |
|
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.