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 | |
|---|---|---|---|---|---|---|
51
PUT
TSMC
TSM
$2.2T
| $376M | 0.22% |
2,764,100
+338,400
| +14% | +$42M |
|
52
CALL
JPMorgan Chase
JPM
$918B
| $376M | 0.22% |
1,875,800
-49,200
| -3% | -$8.88M |
|
53
CALL
Coinbase
COIN
$46.3B
| $346M | 0.2% |
1,370,000
-676,900
| -33% | -$122M |
|
|
54
CALL
Citigroup
C
$223B
| $340M | 0.2% |
5,373,400
-1,623,500
| -23% | -$90.3M |
|
55
PUT
Eli Lilly
LLY
$1.05T
| $331M | 0.19% |
425,000
+101,500
| +31% | +$72.2M |
|
56
CALL
ExxonMobil
XOM
$629B
| $317M | 0.18% |
2,786,000
-81,900
| -3% | -$8.57M |
|
|
57
CALL
Walt Disney
DIS
$167B
| $305M | 0.18% |
2,837,400
-110,200
| -4% | -$11.5M |
|
|
58
PUT
Boeing
BA
$161B
| $286M | 0.17% |
1,481,400
+237,300
| +19% | +$48.8M |
|
59
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $271M | 0.16% |
644,500
+67,700
| +12% | +$26.6M |
|
|
60
PUT
JPMorgan Chase
JPM
$918B
| $269M | 0.16% |
1,341,300
-278,200
| -17% | -$50.2M |
|
61
CALL
Adobe
ADBE
$90.3B
| $268M | 0.15% |
531,000
-1,800
| -0.3% | -$1.03M |
|
62
CALL
PayPal
PYPL
$49.3B
| $266M | 0.15% |
3,971,300
-2,328,300
| -37% | -$143M |
|
63
CALL
Palo Alto Networks
PANW
$279B
| $262M | 0.15% |
1,845,000
+660,000
| +56% | +$104M |
|
64
CALL
ASML
ASML
$692B
| $258M | 0.15% |
266,200
+104,100
| +64% | +$92.3M |
|
65
CALL
Salesforce
CRM
$139B
| $257M | 0.15% |
854,200
+64,200
| +8% | +$18.5M |
|
66
PUT
Bank of America
BAC
$430B
| $257M | 0.15% |
6,774,300
+304,000
| +5% | +$10.4M |
|
|
67
PUT
Salesforce
CRM
$139B
| $256M | 0.15% |
849,700
-256,500
| -23% | -$74M |
|
68
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $255M | 0.15% |
640,400
-214,500
| -25% | -$82.6M |
|
69
CALL
Pinduoduo
PDD
$121B
| $253M | 0.15% |
2,176,300
+371,100
| +21% | +$48.6M |
|
70
PUT
Goldman Sachs
GS
$320B
| $252M | 0.15% |
604,400
-60,200
| -9% | -$23.4M |
|
|
71
PUT
Palo Alto Networks
PANW
$279B
| $247M | 0.14% |
1,737,400
+163,200
| +10% | +$25.7M |
|
|
72
PUT
Adobe
ADBE
$90.3B
| $244M | 0.14% |
513,100
-69,300
| -12% | -$39.7M |
|
|
73
PUT
Walt Disney
DIS
$167B
| $238M | 0.14% |
1,941,600
-198,300
| -9% | -$20.7M |
|
|
74
PUT
ExxonMobil
XOM
$629B
| $229M | 0.13% |
2,149,000
-595,500
| -22% | -$62.3M |
|
75
CALL
Chevron
CVX
$381B
| $228M | 0.13% |
1,499,400
+139,800
| +10% | +$21.1M |
|
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.