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 | |
|---|---|---|---|---|---|---|
1151
CALL
Kohl's
KSS
$2.08B
| $6.79M | 0.01% |
323,900
-1,300
| -0.4% | -$32.8K |
|
1152
PUT
Aflac
AFL
$63.7B
| $6.78M | 0.01% |
88,300
-17,700
| -17% | -$1.31M |
|
1153
CALL
Dropbox
DBX
$6.85B
| $6.77M | 0.01% |
248,600
-219,500
| -47% | -$5.98M |
|
1154
PUT
Everest Group
EG
$15.2B
| $6.76M | 0.01% |
18,200
+13,200
| +264% | +$4.79M |
|
1155
PUT
S&P Global
SPGI
$126B
| $6.76M | 0.01% |
18,500
+6,500
| +54% | +$2.56M |
|
1156
CALL
TC Energy
TRP
$73.4B
| $6.71M | 0.01% |
195,000
+87,500
| +81% | +$3.22M |
|
1157
CALL
Applovin
APP
$132B
| $6.69M | 0.01% |
167,400
+54,600
| +48% | +$1.94M |
|
1158
PUT
Fair Isaac
FICO
$28.9B
| $6.69M | 0.01% |
7,700
-2,200
| -22% | -$1.89M |
|
|
GTM
1159
PUT
ZoomInfo Technologies
GTM
$866M
| $6.68M | 0.01% |
407,600
+140,500
| +53% | +$2.87M |
|
1160
PUT
Vanguard FTSE Europe ETF
VGK
$29.9B
| $6.65M | 0.01% |
129,900
+18,700
| +17% | +$1.14M |
|
1161
PUT
Moody's
MCO
$82.4B
| $6.64M | 0.01% |
21,000
+9,100
| +76% | +$3.1M |
|
1162
CALL
AGNC Investment
AGNC
$12.3B
| $6.63M | 0.01% |
702,500
-527,500
| -43% | -$5.22M |
|
1163
CALL
WIX.com
WIX
$2.16B
| $6.63M | 0.01% |
72,200
+1,800
| +3% | +$161K |
|
1164
PUT
Nu Holdings
NU
$68.3B
| $6.63M | 0.01% |
913,900
+541,300
| +145% | +$4.05M |
|
1165
CALL
Motorola Solutions
MSI
$68.6B
| $6.62M | 0.01% |
24,300
+8,000
| +49% | +$2.28M |
|
1166
Booking.com
BKNG
$138B
| $6.58M | 0.01% |
+53,350
| New | +$6.46M |
|
1167
Linde
LIN
$237B
| $6.58M | 0.01% |
+17,674
| New | +$6.73M |
|
1168
CALL
Diageo
DEO
$46.3B
| $6.52M | 0.01% |
43,700
+3,600
| +9% | +$603K |
|
1169
PUT
Helen of Troy
HELE
$661M
| $6.51M | 0.01% |
55,900
-110,500
| -66% | -$13.8M |
|
|
PARA
1170
CALL
DELISTED
Paramount Global Class B
PARA
| $6.51M | 0.01% |
505,000
-1,616,000
| -76% | -$23.9M |
|
1171
3M
MMM
$88B
| $6.5M | 0.01% |
+82,992
| New | +$7.13M |
|
|
1172
PUT
WIX.com
WIX
$2.16B
| $6.49M | 0.01% |
70,700
+24,600
| +53% | +$2.2M |
|
1173
Danaher
DHR
$135B
| $6.49M | 0.01% |
29,497
+8,524
| +41% | +$1.9M |
|
1174
PUT
ZIM Integrated Shipping Services
ZIM
$3.03B
| $6.48M | 0.01% |
619,800
+32,600
| +6% | +$415K |
|
1175
Teva Pharmaceuticals
TEVA
$35.9B
| $6.47M | 0.01% |
633,977
-427,564
| -40% | -$3.98M |
|
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.