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 | |
|---|---|---|---|---|---|---|
101
PUT
UnitedHealth
UNH
$396B
| $144M | 0.09% |
274,900
+1,600
| +0.6% | +$818K |
|
102
CALL
Coca-Cola
KO
$353B
| $141M | 0.09% |
1,966,500
+922,000
| +88% | +$61.6M |
|
103
PUT
Coinbase
COIN
$46.3B
| $139M | 0.09% |
806,100
-345,500
| -30% | -$83.7M |
|
104
CALL
Carvana
CVNA
$47B
| $137M | 0.09% |
3,265,500
-371,000
| -10% | -$16.4M |
|
105
PUT
Oracle
ORCL
$366B
| $135M | 0.09% |
967,200
-472,300
| -33% | -$76.9M |
|
106
PUT
Arm
ARM
$309B
| $134M | 0.09% |
1,254,200
-11,500
| -0.9% | -$1.6M |
|
107
CALL
CrowdStrike
CRWD
$195B
| $133M | 0.09% |
1,507,600
-880,400
| -37% | -$83.9M |
|
108
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $133M | 0.09% |
349,000
-153,600
| -31% | -$83M |
|
109
CALL
Palo Alto Networks
PANW
$279B
| $133M | 0.09% |
777,700
+4,100
| +0.5% | +$758K |
|
110
PUT
Salesforce
CRM
$139B
| $131M | 0.08% |
489,500
-361,400
| -42% | -$112M |
|
|
KFYP
111
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $129M | 0.08% |
3,703,900
+1,447,000
| +64% | +$50.5M |
|
112
PUT
Bank of America
BAC
$430B
| $129M | 0.08% |
3,091,100
-1,291,100
| -29% | -$57.5M |
|
113
PUT
Adobe
ADBE
$90.3B
| $128M | 0.08% |
367,500
-58,800
| -14% | -$25.2M |
|
114
PUT
Morgan Stanley
MS
$340B
| $128M | 0.08% |
1,094,300
+13,100
| +1% | +$1.69M |
|
115
PUT
Nike
NKE
$63.7B
| $126M | 0.08% |
1,977,900
+87,800
| +5% | +$6.46M |
|
116
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
| $125M | 0.08% |
4,592,900
+610,600
| +15% | +$17.3M |
|
117
PUT
IBM
IBM
$198B
| $123M | 0.08% |
494,700
-107,200
| -18% | -$26.2M |
|
118
PUT
Robinhood
HOOD
$95.5B
| $123M | 0.08% |
2,945,200
-74,800
| -2% | -$3.56M |
|
119
CALL
Wells Fargo
WFC
$266B
| $122M | 0.08% |
1,696,000
-206,600
| -11% | -$15.5M |
|
|
120
NVIDIA
NVDA
$5.02T
| $121M | 0.08% |
1,113,380
+709,408
| +176% | +$89.9M |
|
121
CALL
AbbVie
ABBV
$452B
| $119M | 0.08% |
567,900
-57,000
| -9% | -$11.1M |
|
122
CALL
Proshares UltraShort Technology
REW
$3.27M
| $119M | 0.08% |
975,075
-998,975
| -51% | -$42.6M |
|
123
CALL
JD.com
JD
$41.1B
| $118M | 0.08% |
2,880,700
-2,059,800
| -42% | -$82.7M |
|
124
PUT
Pfizer
PFE
$142B
| $118M | 0.08% |
4,651,800
-390,200
| -8% | -$10.2M |
|
125
CALL
Occidental Petroleum
OXY
$56.2B
| $118M | 0.08% |
2,384,900
-528,900
| -18% | -$25.8M |
|
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.