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 | |
|---|---|---|---|---|---|---|
326
CALL
Ulta Beauty
ULTA
$20.8B
| $46.2M | 0.03% |
106,200
+300
| +0.3% | +$116K |
|
327
PUT
Lockheed Martin
LMT
$119B
| $46M | 0.03% |
94,700
+32,700
| +53% | +$17.8M |
|
328
PUT
Affirm
AFRM
$24.8B
| $45.8M | 0.03% |
751,800
-274,200
| -27% | -$15.2M |
|
329
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $45.7M | 0.03% |
631,700
+485,480
| +332% | +$43.7M |
|
330
CALL
HubSpot
HUBS
$10.5B
| $45.6M | 0.03% |
65,500
-3,000
| -4% | -$1.93M |
|
331
PUT
Mercado Libre
MELI
$91.2B
| $45.6M | 0.03% |
26,800
-1,500
| -5% | -$2.92M |
|
332
PUT
Accenture
ACN
$85.7B
| $45.5M | 0.03% |
129,400
-1,200
| -0.9% | -$432K |
|
333
CALL
Ford
F
$57.5B
| $45.4M | 0.03% |
4,582,900
+1,086,700
| +31% | +$11.6M |
|
334
PUT
CAVA Group
CAVA
$7.26B
| $45.2M | 0.03% |
400,500
+37,600
| +10% | +$5.01M |
|
335
CALL
Deere & Co
DE
$164B
| $45.2M | 0.03% |
106,600
+9,100
| +9% | +$3.83M |
|
336
PUT
Honeywell
HON
$73.8B
| $45.1M | 0.03% |
211,670
+98,355
| +87% | +$20.5M |
|
|
SCHW
337
CALL
Charles Schwab
SCHW
$175B
| $44.8M | 0.03% |
605,900
-256,000
| -30% | -$19.2M |
|
338
PUT
Lowe's Companies
LOW
$115B
| $44.8M | 0.03% |
181,600
-183,200
| -50% | -$48.9M |
|
339
PUT
Capital One
COF
$124B
| $44.8M | 0.03% |
251,100
+21,200
| +9% | +$3.67M |
|
340
Nike
NKE
$62.6B
| $44.7M | 0.03% |
590,924
+391,360
| +196% | +$30.7M |
|
341
CALL
Core Scientific
CORZ
$7.51B
| $44.7M | 0.03% |
3,181,400
+827,800
| +35% | +$12.2M |
|
342
CALL
Vale
VALE
$63.2B
| $44.7M | 0.03% |
5,036,400
+1,234,000
| +32% | +$12.6M |
|
343
PUT
Vertiv
VRT
$116B
| $44.5M | 0.02% |
391,300
-113,100
| -22% | -$13.4M |
|
344
PUT
RTX Corp
RTX
$262B
| $44.2M | 0.02% |
543,500
+208,900
| +62% | +$25.2M |
|
345
CALL
Astera Labs
ALAB
$56.7B
| $44.2M | 0.02% |
333,400
+220,700
| +196% | +$20.7M |
|
346
PUT
Moderna
MRNA
$23B
| $44.1M | 0.02% |
1,061,200
+41,700
| +4% | +$1.99M |
|
347
PUT
Albemarle
ALB
$13.9B
| $44M | 0.02% |
511,600
+68,300
| +15% | +$6.8M |
|
348
PUT
Dollar Tree
DLTR
$23.5B
| $44M | 0.02% |
587,400
-55,000
| -9% | -$3.78M |
|
349
PUT
Marriott International
MAR
$97.5B
| $44M | 0.02% |
157,600
+45,300
| +40% | +$12.4M |
|
350
CALL
W.W. Grainger
GWW
$63.9B
| $43.4M | 0.02% |
41,200
-11,900
| -22% | -$13.4M |
|
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.