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 | |
|---|---|---|---|---|---|---|
451
PUT
Elevance Health
ELV
$84.4B
| $31.2M | 0.02% |
84,600
+57,700
| +214% | +$24.1M |
|
452
CALL
EOG Resources
EOG
$76.7B
| $30.9M | 0.02% |
252,200
-42,500
| -14% | -$5.43M |
|
453
CALL
Ross Stores
ROST
$76.4B
| $30.8M | 0.02% |
203,700
+43,000
| +27% | +$6.32M |
|
454
PUT
Cigna
CI
$75.4B
| $30.7M | 0.02% |
111,300
+30,800
| +38% | +$9.82M |
|
455
PUT
Hims & Hers Health
HIMS
$7.33B
| $30.7M | 0.02% |
1,268,100
+803,100
| +173% | +$19.9M |
|
456
CALL
DexCom
DXCM
$27.6B
| $30.6M | 0.02% |
394,100
+191,000
| +94% | +$14.1M |
|
457
CALL
EQT Corp
EQT
$33.8B
| $30.5M | 0.02% |
660,800
+172,800
| +35% | +$7.13M |
|
458
CALL
Nucor
NUE
$53.7B
| $30.3M | 0.02% |
259,300
+123,900
| +92% | +$17.8M |
|
459
PUT
Devon Energy
DVN
$51.8B
| $30.2M | 0.02% |
1,456,200
+577,400
| +66% | +$21.7M |
|
460
CALL
Capital One
COF
$124B
| $30.1M | 0.02% |
169,000
-36,900
| -18% | -$6.39M |
|
461
CALL
Thermo Fisher Scientific
TMO
$196B
| $30M | 0.02% |
57,600
-1,100
| -2% | -$605K |
|
|
462
CALL
Devon Energy
DVN
$51.8B
| $29.9M | 0.02% |
913,800
-95,900
| -9% | -$3.61M |
|
463
CALL
Dollar General
DG
$26.5B
| $29.9M | 0.02% |
394,000
+25,600
| +7% | +$2.02M |
|
464
PUT
American International
AIG
$41.5B
| $29.8M | 0.02% |
409,700
+79,400
| +24% | +$5.97M |
|
465
PUT
Zoom
ZM
$25.2B
| $29.8M | 0.02% |
365,200
-14,200
| -4% | -$1.12M |
|
466
CALL
AutoZone
AZO
$48.5B
| $29.8M | 0.02% |
9,300
-100
| -1% | -$317K |
|
467
CALL
Valero Energy
VLO
$92.3B
| $29.7M | 0.02% |
242,000
+21,200
| +10% | +$2.84M |
|
468
CALL
Atlassian
TEAM
$21.7B
| $29.6M | 0.02% |
121,800
-20,500
| -14% | -$4.69M |
|
469
CALL
Southern Company
SO
$108B
| $29.6M | 0.02% |
359,800
-4,400
| -1% | -$386K |
|
|
DOCU
470
CALL
DocuSign
DOCU
$9.14B
| $29.6M | 0.02% |
329,200
-71,900
| -18% | -$5.74M |
|
471
CALL
Intuit
INTU
$77.8B
| $29.6M | 0.02% |
47,100
-17,300
| -27% | -$11.1M |
|
472
CALL
Trump Media & Technology Group
DJT
$2.56B
| $29.6M | 0.02% |
866,600
+247,600
| +40% | +$7.87M |
|
473
PUT
Celsius Holdings
CELH
$7.28B
| $29.5M | 0.02% |
1,121,300
-32,400
| -3% | -$961K |
|
474
PUT
Wynn Resorts
WYNN
$9.79B
| $29.5M | 0.02% |
342,700
-369,400
| -52% | -$34.9M |
|
475
CALL
HP
HPQ
$23B
| $29.5M | 0.02% |
903,300
+33,300
| +4% | +$1.2M |
|
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.