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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
PUT
Intel
INTC
$530B
| $184M | 0.12% |
8,119,400
+861,400
| +12% | +$18.8M |
|
77
CALL
Eli Lilly
LLY
$1.05T
| $184M | 0.12% |
222,600
-197,800
| -47% | -$165M |
|
78
CALL
Oracle
ORCL
$366B
| $182M | 0.12% |
1,301,200
+294,500
| +29% | +$47.9M |
|
79
PUT
iShares Bitcoin Trust
IBIT
$48.9B
| $180M | 0.12% |
3,854,400
-473,700
| -11% | -$25.1M |
|
80
PUT
iShares Silver Trust
SLV
$28.4B
| $180M | 0.12% |
5,801,700
-531,500
| -8% | -$15.4M |
|
|
81
CALL
Uber
UBER
$146B
| $180M | 0.12% |
2,466,700
-1,308,100
| -35% | -$94.2M |
|
82
CALL
ASML
ASML
$692B
| $177M | 0.11% |
266,400
-15,900
| -6% | -$11.6M |
|
83
CALL
Robinhood
HOOD
$95.5B
| $176M | 0.11% |
4,658,200
-33,300
| -0.7% | -$1.58M |
|
84
CALL
Super Micro Computer
SMCI
$16.5B
| $174M | 0.11% |
5,078,200
-1,605,400
| -24% | -$60.9M |
|
85
CALL
Coinbase
COIN
$46.3B
| $174M | 0.11% |
1,008,100
-213,400
| -17% | -$51.7M |
|
86
CALL
Walt Disney
DIS
$167B
| $171M | 0.11% |
1,729,100
-256,100
| -13% | -$27.5M |
|
87
CALL
PayPal
PYPL
$49.3B
| $170M | 0.11% |
2,606,700
-656,500
| -20% | -$51.1M |
|
88
CALL
Goldman Sachs
GS
$320B
| $167M | 0.11% |
305,400
-14,900
| -5% | -$8.97M |
|
|
89
PUT
Uber
UBER
$146B
| $165M | 0.11% |
2,270,900
-467,400
| -17% | -$33.7M |
|
90
PUT
Palo Alto Networks
PANW
$279B
| $165M | 0.11% |
968,100
-546,900
| -36% | -$101M |
|
91
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $164M | 0.11% |
2,219,900
+1,274,300
| +135% | +$105M |
|
92
PUT
Invesco Aerospace & Defense ETF
PPA
$7.97B
| $164M | 0.1% |
952,400
+763,200
| +403% | +$89.8M |
|
93
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $162M | 0.1% |
385,000
-205,500
| -35% | -$88.9M |
|
94
CALL
CVS Health
CVS
$141B
| $158M | 0.1% |
2,332,800
-654,200
| -22% | -$39.1M |
|
95
PUT
Wells Fargo
WFC
$266B
| $156M | 0.1% |
2,179,600
-427,200
| -16% | -$32.1M |
|
96
CALL
Chevron
CVX
$381B
| $154M | 0.1% |
921,400
-111,600
| -11% | -$17.5M |
|
97
CALL
Visa
V
$677B
| $153M | 0.1% |
437,800
-188,400
| -30% | -$63.8M |
|
98
PUT
Carvana
CVNA
$47B
| $152M | 0.1% |
3,632,000
+776,500
| +27% | +$34.4M |
|
99
CALL
Cisco
CSCO
$442B
| $149M | 0.1% |
2,422,200
-178,500
| -7% | -$11M |
|
100
CALL
Johnson & Johnson
JNJ
$603B
| $147M | 0.09% |
883,800
+122,200
| +16% | +$19.1M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.