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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
76
CALL
TSMC
TSM
$2.2T
| $227M | 0.13% |
1,308,200
-862,600
| -40% | -$147M |
|
77
CALL
Walt Disney
DIS
$167B
| $226M | 0.13% |
2,349,000
-768,500
| -25% | -$70.7M |
|
78
CALL
Uber
UBER
$146B
| $223M | 0.13% |
2,973,000
+629,100
| +27% | +$44.3M |
|
79
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $209M | 0.12% |
546,400
-20,500
| -4% | -$10.4M |
|
80
CALL
Home Depot
HD
$331B
| $202M | 0.12% |
499,500
+62,300
| +14% | +$22.7M |
|
81
CALL
Intel
INTC
$530B
| $202M | 0.12% |
8,605,700
+3,483,200
| +68% | +$87M |
|
82
CALL
Visa
V
$677B
| $202M | 0.12% |
733,800
+158,500
| +28% | +$42.9M |
|
83
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $200M | 0.12% |
2,709,200
-1,226,900
| -31% | -$97.1M |
|
84
PUT
Salesforce
CRM
$139B
| $199M | 0.12% |
728,800
-5,900
| -0.8% | -$1.51M |
|
|
85
PUT
Citigroup
C
$223B
| $194M | 0.11% |
3,096,400
+109,100
| +4% | +$6.75M |
|
86
PUT
Arm
ARM
$309B
| $194M | 0.11% |
1,353,800
+12,700
| +0.9% | +$1.8M |
|
87
CALL
JD.com
JD
$41.1B
| $188M | 0.11% |
4,695,500
+1,350,200
| +40% | +$37.1M |
|
88
PUT
Palantir
PLTR
$318B
| $181M | 0.11% |
6,277,600
+1,873,400
| +43% | +$57.5M |
|
89
PUT
Qualcomm
QCOM
$183B
| $180M | 0.11% |
1,055,900
-179,000
| -14% | -$31.6M |
|
90
PUT
Adobe
ADBE
$90.3B
| $177M | 0.1% |
342,600
-47,500
| -12% | -$26.1M |
|
|
91
CALL
Vanguard S&P 500 ETF
VOO
$981B
| $175M | 0.1% |
478,900
+122,300
| +34% | +$62.2M |
|
92
CALL
IBM
IBM
$198B
| $172M | 0.1% |
776,400
+143,000
| +23% | +$28M |
|
|
93
CALL
Qualcomm
QCOM
$183B
| $171M | 0.1% |
1,007,800
-378,900
| -27% | -$66.9M |
|
94
PUT
Coinbase
COIN
$46.3B
| $168M | 0.1% |
943,000
-32,700
| -3% | -$6.55M |
|
95
CALL
UnitedHealth
UNH
$396B
| $168M | 0.1% |
286,700
+31,100
| +12% | +$17.6M |
|
96
NVIDIA
NVDA
$5.02T
| $167M | 0.1% |
1,371,414
+203,634
| +17% | +$24.1M |
|
97
PUT
Nike
NKE
$63.7B
| $163M | 0.1% |
1,847,800
+59,800
| +3% | +$4.69M |
|
|
98
PUT
Visa
V
$677B
| $161M | 0.09% |
645,800
+186,400
| +41% | +$50.4M |
|
|
99
CALL
Salesforce
CRM
$139B
| $160M | 0.09% |
583,700
-182,300
| -24% | -$46.7M |
|
|
100
PUT
Home Depot
HD
$331B
| $160M | 0.09% |
394,100
+62,400
| +19% | +$22.8M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.