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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
101
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $127M | 0.1% |
2,980,000
-765,000
| -20% | -$30.3M |
|
102
PUT
Cisco
CSCO
$442B
| $126M | 0.1% |
2,439,300
+295,800
| +14% | +$14.5M |
|
103
CALL
Airbnb
ABNB
$86B
| $125M | 0.1% |
979,100
-182,700
| -16% | -$21.4M |
|
104
PUT
FedEx
FDX
$73.1B
| $125M | 0.1% |
504,600
-189,300
| -27% | -$43.3M |
|
105
PUT
Shopify
SHOP
$160B
| $124M | 0.1% |
1,917,900
+278,600
| +17% | +$15.7M |
|
106
PUT
Citigroup
C
$216B
| $122M | 0.1% |
2,648,300
-919,600
| -26% | -$43.1M |
|
107
PUT
ASML
ASML
$692B
| $121M | 0.1% |
166,800
-37,200
| -18% | -$25.3M |
|
108
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $120M | 0.1% |
942,000
-511,300
| -35% | -$14.9M |
|
109
CALL
IBM
IBM
$198B
| $120M | 0.1% |
900,800
+12,500
| +1% | +$1.61M |
|
|
110
CALL
ASML
ASML
$692B
| $120M | 0.1% |
165,300
+74,100
| +81% | +$50.4M |
|
111
PUT
Visa
V
$677B
| $120M | 0.1% |
504,000
-345,600
| -41% | -$79.1M |
|
112
CALL
Carnival Corporation Ltd
CCL
$35.8B
| $117M | 0.1% |
6,211,600
+2,620,600
| +73% | +$30.7M |
|
113
PUT
Nike
NKE
$63.7B
| $117M | 0.1% |
1,058,500
-584,300
| -36% | -$68.3M |
|
114
PUT
Coca-Cola
KO
$353B
| $116M | 0.1% |
1,923,300
+8,100
| +0.4% | +$504K |
|
115
CALL
Palo Alto Networks
PANW
$279B
| $116M | 0.1% |
906,400
-94,600
| -9% | -$9.84M |
|
|
SCHW
116
PUT
Charles Schwab
SCHW
$178B
| $115M | 0.09% |
2,032,400
-280,800
| -12% | -$14.7M |
|
117
CALL
Bank of America
BAC
$430B
| $115M | 0.09% |
4,011,200
-2,412,700
| -38% | -$68.8M |
|
|
118
PUT
Airbnb
ABNB
$86B
| $115M | 0.09% |
897,900
-210,100
| -19% | -$24.6M |
|
|
XYZ
119
PUT
Block Inc
XYZ
$47.8B
| $114M | 0.09% |
1,715,200
-754,500
| -31% | -$47.1M |
|
|
120
CALL
Starbucks
SBUX
$119B
| $112M | 0.09% |
1,125,600
+364,300
| +48% | +$37.8M |
|
121
PUT
Albemarle
ALB
$13.9B
| $111M | 0.09% |
498,200
+91,900
| +23% | +$18.8M |
|
122
PUT
Mastercard
MA
$484B
| $111M | 0.09% |
282,200
-147,200
| -34% | -$55.2M |
|
123
CALL
ServiceNow
NOW
$105B
| $111M | 0.09% |
985,500
+290,500
| +42% | +$29M |
|
124
CALL
Morgan Stanley
MS
$332B
| $110M | 0.09% |
1,289,500
-233,400
| -15% | -$20M |
|
125
PUT
United Airlines
UAL
$38.2B
| $110M | 0.09% |
2,000,700
-156,000
| -7% | -$7.37M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.