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 | |
|---|---|---|---|---|---|---|
|
BRDS
7076
CALL
DELISTED
Bird Global, Inc.
BRDS
| $12K | ﹤0.01% |
22,000
+10,100
| +85% | +$16.8K |
|
|
ROI
7077
PUT
DELISTED
WISDOMTREE LARGECAP GROWTH FUND
ROI
| $12K | ﹤0.01% |
+200
| New | +$12K |
|
|
AGS
7078
DELISTED
PlayAGS
AGS
| $11K | ﹤0.01% |
+1,761
| New | +$11.8K |
|
7079
PUT
Allison Transmission
ALSN
$10B
| $11K | ﹤0.01% |
200
-1,200
| -86% | -$70.7K |
|
|
ARBK
7080
CALL
Argo Blockchain
ARBK
$42.1M
| $11K | ﹤0.01% |
51
+13
| +34% | +$3.73K |
|
|
OPTU
7081
PUT
Optimum Communications Inc
OPTU
$298M
| $11K | ﹤0.01% |
3,400
+500
| +17% | +$1.61K |
|
|
AZEK
7082
PUT
DELISTED
The AZEK Co
AZEK
| $11K | ﹤0.01% |
400
-600
| -60% | -$18.9K |
|
7083
Boston Omaha
BOC
$435M
| $11K | ﹤0.01% |
715
+170
| +31% | +$3.05K |
|
7084
PUT
Betterware México
BWMX
$643M
| $11K | ﹤0.01% |
700
+500
| +250% | +$7.52K |
|
7085
Corporacion America
CAAP
$4.26B
| $11K | ﹤0.01% |
+872
| New | +$12K |
|
7086
PUT
CareDx
CDNA
$1.85B
| $11K | ﹤0.01% |
1,600
+400
| +33% | +$3.7K |
|
7087
PUT
Conduent
CNDT
$251M
| $11K | ﹤0.01% |
3,200
+700
| +28% | +$2.34K |
|
7088
America's Car Mart
CRMT
$27.1M
| $11K | ﹤0.01% |
124
+65
| +110% | +$6.79K |
|
7089
PUT
Clearway Energy Class C
CWEN
$4.9B
| $11K | ﹤0.01% |
600
-3,600
| -86% | -$91.5K |
|
7090
CALL
Enel Chile
ENIC
$6.05B
| $11K | ﹤0.01% |
+4,000
| New | +$13.1K |
|
7091
The Ensign Group
ENSG
$10.7B
| $11K | ﹤0.01% |
+128
| New | +$12.1K |
|
|
EPIX
7092
DELISTED
ESSA Pharma
EPIX
| $11K | ﹤0.01% |
3,669
-2,020
| -36% | -$5.82K |
|
7093
PUT
Fortrea Holdings
FTRE
$1.96B
| $11K | ﹤0.01% |
+400
| New | +$11.8K |
|
7094
CALL
Griffon
GFF
$4.29B
| $11K | ﹤0.01% |
300
-5,900
| -95% | -$242K |
|
7095
iShares US Treasury Bond ETF
GOVT
$43.9B
| $11K | ﹤0.01% |
+522
| New | +$11.8K |
|
|
GPMT
7096
PUT
Granite Point Mortgage Trust
GPMT
$63.3M
| $11K | ﹤0.01% |
2,400
+1,300
| +118% | +$6.98K |
|
7097
GeoPark
GPRK
$601M
| $11K | ﹤0.01% |
+1,102
| New | +$10.8K |
|
7098
PUT
Horizon Technology Finance
HRZN
$295M
| $11K | ﹤0.01% |
1,000
-5,200
| -84% | -$63.8K |
|
7099
PUT
Huazhu Hotels Group
HTHT
$13.2B
| $11K | ﹤0.01% |
300
-800
| -73% | -$33.7K |
|
7100
CALL
Hawkins
HWKN
$2.99B
| $11K | ﹤0.01% |
+200
| New | +$10.8K |
|
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.