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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
101
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $158M | 0.09% |
375,400
+41,600
| +12% | +$16.4M |
|
102
CALL
Palantir
PLTR
$318B
| $155M | 0.09% |
6,716,100
-1,400,900
| -17% | -$29.9M |
|
103
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $153M | 0.09% |
2,988,100
-1,522,300
| -34% | -$115M |
|
104
CALL
Nike
NKE
$63.7B
| $152M | 0.09% |
1,617,700
+377,900
| +30% | +$38.4M |
|
105
PUT
Qualcomm
QCOM
$183B
| $152M | 0.09% |
897,700
+84,600
| +10% | +$13.1M |
|
106
CALL
UnitedHealth
UNH
$396B
| $150M | 0.09% |
304,100
+43,100
| +17% | +$21.9M |
|
107
CALL
Shopify
SHOP
$160B
| $147M | 0.09% |
1,906,500
-683,200
| -26% | -$54M |
|
108
PUT
Arm
ARM
$309B
| $147M | 0.08% |
1,173,500
+639,100
| +120% | +$67.7M |
|
109
CALL
Walmart Inc
WMT
$878B
| $145M | 0.08% |
2,414,900
+36,200
| +2% | +$2.07M |
|
110
CALL
FedEx
FDX
$75.2B
| $144M | 0.08% |
497,300
+20,500
| +4% | +$5.13M |
|
111
PUT
Applied Materials
AMAT
$448B
| $143M | 0.08% |
694,700
-114,500
| -14% | -$21M |
|
112
CALL
Caterpillar
CAT
$410B
| $142M | 0.08% |
387,600
-51,900
| -12% | -$16.6M |
|
113
PUT
Chevron
CVX
$381B
| $141M | 0.08% |
894,600
-824,300
| -48% | -$124M |
|
|
XYZ
114
CALL
Block Inc
XYZ
$47.8B
| $141M | 0.08% |
1,666,900
-660,200
| -28% | -$47.8M |
|
115
CALL
Wells Fargo
WFC
$266B
| $140M | 0.08% |
2,419,900
+625,100
| +35% | +$32.7M |
|
116
CALL
Snowflake
SNOW
$94.2B
| $140M | 0.08% |
866,300
-59,600
| -6% | -$11.6M |
|
117
CALL
General Motors
GM
$71.7B
| $139M | 0.08% |
3,074,100
-470,700
| -13% | -$18.2M |
|
118
PUT
Mastercard
MA
$476B
| $139M | 0.08% |
287,900
-17,300
| -6% | -$7.91M |
|
119
PUT
Occidental Petroleum
OXY
$56.2B
| $138M | 0.08% |
2,117,500
-545,700
| -20% | -$32.6M |
|
120
CALL
Home Depot
HD
$331B
| $138M | 0.08% |
358,600
-107,200
| -23% | -$39.2M |
|
121
CALL
Cisco
CSCO
$442B
| $136M | 0.08% |
2,734,800
+254,000
| +10% | +$12.7M |
|
122
PUT
Airbnb
ABNB
$85.5B
| $136M | 0.08% |
972,400
-254,600
| -21% | -$38.5M |
|
|
123
CALL
Applied Materials
AMAT
$448B
| $136M | 0.08% |
661,100
+262,500
| +66% | +$48.2M |
|
124
CALL
lululemon athletica
LULU
$13.2B
| $136M | 0.08% |
348,200
+113,500
| +48% | +$52.5M |
|
125
CALL
Marvell Technology
MRVL
$187B
| $136M | 0.08% |
1,913,100
+870,300
| +83% | +$59.6M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.