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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6101
CALL
RadNet
RDNT
$5.02B
| $36K | ﹤0.01% |
1,300
-14,000
| -92% | -$436K |
|
|
REVG
6102
CALL
DELISTED
REV Group
REVG
| $36K | ﹤0.01% |
2,300
+1,500
| +188% | +$20.5K |
|
6103
Rigetti Computing
RGTI
$4.97B
| $36K | ﹤0.01% |
27,807
+24,321
| +698% | +$46.6K |
|
|
SFBS
6104
CALL
ServisFirst Bancshares
SFBS
$4.89B
| $36K | ﹤0.01% |
700
+400
| +133% | +$21.2K |
|
6105
CALL
Thomson Reuters
TRI
$42.8B
| $36K | ﹤0.01% |
295
-296
| -50% | -$39K |
|
6106
Universal Electronics
UEIC
$57.8M
| $36K | ﹤0.01% |
3,986
+3,038
| +320% | +$30K |
|
6107
Verrica Pharmaceuticals
VRCA
$89.7M
| $36K | ﹤0.01% |
951
+839
| +749% | +$42.6K |
|
6108
VTEX
VTEX
$735M
| $36K | ﹤0.01% |
+7,366
| New | +$39.4K |
|
6109
CALL
Weave Communications
WEAV
$520M
| $36K | ﹤0.01% |
4,500
+4,300
| +2,150% | +$43.6K |
|
|
XOMA
6110
CALL
DELISTED
Xoma
XOMA
| $36K | ﹤0.01% |
+2,600
| New | +$40.8K |
|
|
YSG
6111
CALL
Yatsen Holding
YSG
$322M
| $36K | ﹤0.01% |
7,260
-620
| -8% | -$3.32K |
|
|
MODN
6112
PUT
DELISTED
MODEL N, INC.
MODN
| $36K | ﹤0.01% |
1,500
+1,300
| +650% | +$38.6K |
|
|
TIO
6113
PUT
DELISTED
Tingo Group, Inc. Common Stock
TIO
| $36K | ﹤0.01% |
35,300
-40,200
| -53% | -$50.8K |
|
6114
Adeia
ADEA
$2.94B
| $35K | ﹤0.01% |
3,364
+2,201
| +189% | +$23.4K |
|
6115
Atlanta Braves Holdings Series B
BATRK
$3.26B
| $35K | ﹤0.01% |
+995
| New | +$37.7K |
|
|
CVGW
6116
CALL
DELISTED
Calavo Growers
CVGW
| $35K | ﹤0.01% |
1,400
-8,500
| -86% | -$276K |
|
6117
PUT
Driven Brands
DRVN
$2.35B
| $35K | ﹤0.01% |
2,800
+1,000
| +56% | +$18.3K |
|
6118
Fidelity MSCI Energy Index ETF
FENY
$2.01B
| $35K | ﹤0.01% |
1,425
+1,000
| +235% | +$24K |
|
|
GB
6119
CALL
DELISTED
Global Blue Group Holding
GB
| $35K | ﹤0.01% |
5,800
-1,200
| -17% | -$6.37K |
|
6120
PUT
Haemonetics
HAE
$3.89B
| $35K | ﹤0.01% |
+400
| New | +$35.7K |
|
6121
PUT
Highwoods Properties
HIW
$3.65B
| $35K | ﹤0.01% |
1,700
-1,100
| -39% | -$26.1K |
|
6122
CALL
InflaRx
IFRX
$250M
| $35K | ﹤0.01% |
12,000
-29,100
| -71% | -$111K |
|
6123
PUT
O-I Glass
OI
$1.1B
| $35K | ﹤0.01% |
2,100
+1,000
| +91% | +$20.1K |
|
|
QIPT
6124
PUT
DELISTED
Quipt Home Medical
QIPT
| $35K | ﹤0.01% |
6,900
-4,100
| -37% | -$22K |
|
6125
PUT
SLR Investment Corp
SLRC
$686M
| $35K | ﹤0.01% |
2,300
+1,700
| +283% | +$25.6K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.