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 | |
|---|---|---|---|---|---|---|
126
CALL
PepsiCo
PEP
$184B
| $115M | 0.07% |
769,700
+486,400
| +172% | +$72.4M |
|
127
CALL
Starbucks
SBUX
$119B
| $115M | 0.07% |
1,369,200
+46,700
| +4% | +$4.83M |
|
128
CALL
Freeport-McMoran
FCX
$89.9B
| $114M | 0.07% |
3,000,300
+639,000
| +27% | +$24.4M |
|
129
CALL
Pfizer
PFE
$142B
| $113M | 0.07% |
4,471,700
-1,969,000
| -31% | -$51.5M |
|
130
PUT
ASML
ASML
$692B
| $112M | 0.07% |
168,600
-8,000
| -5% | -$5.82M |
|
131
CALL
Bank of America
BAC
$430B
| $111M | 0.07% |
2,665,300
-637,900
| -19% | -$28.4M |
|
132
CALL
Verizon
VZ
$182B
| $110M | 0.07% |
2,429,400
+909,100
| +60% | +$37.8M |
|
133
CALL
Home Depot
HD
$332B
| $109M | 0.07% |
298,600
-150,900
| -34% | -$58.8M |
|
134
PUT
Applovin
APP
$143B
| $109M | 0.07% |
410,100
+140,900
| +52% | +$48.6M |
|
135
PUT
Constellation Energy
CEG
$93.6B
| $105M | 0.07% |
521,900
+10,900
| +2% | +$2.92M |
|
|
X
136
CALL
DELISTED
US Steel
X
| $104M | 0.07% |
2,462,200
+14,300
| +0.6% | +$541K |
|
137
PUT
Visa
V
$677B
| $101M | 0.06% |
287,900
-271,000
| -48% | -$91.7M |
|
138
PUT
CVS Health
CVS
$137B
| $101M | 0.06% |
1,488,500
-7,600
| -0.5% | -$455K |
|
|
139
PUT
Starbucks
SBUX
$119B
| $101M | 0.06% |
1,027,500
-202,900
| -16% | -$21M |
|
140
CALL
Morgan Stanley
MS
$332B
| $101M | 0.06% |
861,700
+219,900
| +34% | +$28.3M |
|
141
PUT
CrowdStrike
CRWD
$195B
| $100M | 0.06% |
1,320,400
-1,619,600
| -55% | -$154M |
|
142
PUT
Walt Disney
DIS
$167B
| $99.7M | 0.06% |
1,009,900
-505,800
| -33% | -$54.4M |
|
143
CALL
Adobe
ADBE
$90.3B
| $98.7M | 0.06% |
257,400
-73,000
| -22% | -$31.3M |
|
144
PUT
Chevron
CVX
$381B
| $98.5M | 0.06% |
588,600
-18,400
| -3% | -$2.88M |
|
145
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $97.5M | 0.06% |
3,611,100
+332,500
| +10% | +$8.08M |
|
146
CALL
Procter & Gamble
PG
$345B
| $97.3M | 0.06% |
571,200
+169,800
| +42% | +$28.4M |
|
147
CALL
Arm
ARM
$309B
| $97.2M | 0.06% |
910,600
+3,400
| +0.4% | +$474K |
|
|
148
PUT
Home Depot
HD
$332B
| $96.4M | 0.06% |
263,100
-57,400
| -18% | -$22.4M |
|
149
CALL
Vanguard S&P 500 ETF
VOO
$981B
| $96.2M | 0.06% |
280,900
-232,100
| -45% | -$125M |
|
150
CALL
Baidu
BIDU
$36.8B
| $94.4M | 0.06% |
1,025,500
+194,600
| +23% | +$17.5M |
|
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.