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 | |
|---|---|---|---|---|---|---|
401
PUT
Estee Lauder
EL
$29.9B
| $36.3M | 0.02% |
484,000
-111,500
| -19% | -$8.81M |
|
402
CALL
Comcast
CMCSA
$84B
| $36.2M | 0.02% |
964,500
-215,400
| -18% | -$8.94M |
|
403
CALL
RH
RH
$3.31B
| $36.2M | 0.02% |
91,900
-10,300
| -10% | -$3.66M |
|
404
CALL
C3.ai
AI
$1.27B
| $36.1M | 0.02% |
1,048,600
+413,000
| +65% | +$12.8M |
|
405
CALL
General Dynamics
GD
$101B
| $36.1M | 0.02% |
136,900
+22,800
| +20% | +$6.56M |
|
406
PUT
Abercrombie & Fitch
ANF
$4.27B
| $36.1M | 0.02% |
241,200
-20,300
| -8% | -$2.97M |
|
407
PUT
Synopsys
SNPS
$72.3B
| $36M | 0.02% |
74,200
+2,800
| +4% | +$1.46M |
|
408
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $35.4M | 0.02% |
87,900
+28,700
| +48% | +$13.3M |
|
409
CALL
Northrop Grumman
NOC
$74.6B
| $35.4M | 0.02% |
75,400
+13,100
| +21% | +$6.59M |
|
410
PUT
VF Corp
VFC
$6.74B
| $35.4M | 0.02% |
1,648,200
+239,100
| +17% | +$4.87M |
|
411
PUT
Return Stacked Bonds & Managed Futures ETF
RSBT
$137M
| $35M | 0.02% |
1,144,100
+934,900
| +447% | +$15.9M |
|
412
CALL
Cloudflare
NET
$95.5B
| $34.9M | 0.02% |
324,300
+8,700
| +3% | +$850K |
|
413
CALL
Charter Communications
CHTR
$15.9B
| $34.8M | 0.02% |
101,500
-56,500
| -36% | -$20.4M |
|
414
CALL
Zscaler
ZS
$23B
| $34.8M | 0.02% |
192,800
-16,100
| -8% | -$3.12M |
|
415
CALL
Accenture
ACN
$85.7B
| $34.6M | 0.02% |
98,400
-59,600
| -38% | -$21.5M |
|
416
PUT
TKO Group
TKO
$13.6B
| $34.4M | 0.02% |
242,100
+114,900
| +90% | +$15M |
|
417
CALL
Kinder Morgan
KMI
$72.3B
| $34.3M | 0.02% |
1,250,900
+294,900
| +31% | +$7.69M |
|
418
PUT
iShares Gold Trust
IAU
$64.2B
| $34.3M | 0.02% |
692,000
+100,400
| +17% | +$5.04M |
|
419
CALL
DuPont de Nemours
DD
$18.9B
| $34.1M | 0.02% |
356,747
-140,373
| -28% | -$14.6M |
|
|
420
PUT
Cloudflare
NET
$95.5B
| $34.1M | 0.02% |
316,900
-17,700
| -5% | -$1.73M |
|
421
PUT
Western Digital
WDC
$192B
| $34M | 0.02% |
754,110
-81,497
| -10% | -$4.1M |
|
422
CALL
Mercado Libre
MELI
$91.2B
| $33.8M | 0.02% |
19,900
-14,700
| -42% | -$28.6M |
|
423
PUT
Prudential Financial
PRU
$41.3B
| $33.7M | 0.02% |
284,400
+179,300
| +171% | +$22.1M |
|
424
CALL
NIO
NIO
$11.7B
| $33.6M | 0.02% |
7,701,700
+1,916,800
| +33% | +$9.75M |
|
425
PUT
Intuit
INTU
$77.8B
| $33.4M | 0.02% |
53,100
-18,400
| -26% | -$11.8M |
|
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.