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 | |
|---|---|---|---|---|---|---|
1001
CALL
JB Hunt Transport Services
JBHT
$27.2B
| $8.6M | 0.01% |
45,600
+7,400
| +19% | +$1.42M |
|
1002
CALL
Cenovus Energy
CVE
$55.4B
| $8.57M | 0.01% |
411,600
+93,900
| +30% | +$1.79M |
|
1003
PUT
Synchrony
SYF
$23.3B
| $8.55M | 0.01% |
279,600
-16,500
| -6% | -$549K |
|
1004
PUT
Seagate
STX
$207B
| $8.53M | 0.01% |
129,300
-76,100
| -37% | -$4.9M |
|
|
APLS
1005
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $8.51M | 0.01% |
223,700
+23,200
| +12% | +$1.02M |
|
1006
CALL
Abercrombie & Fitch
ANF
$4.04B
| $8.51M | 0.01% |
150,900
+55,000
| +57% | +$2.44M |
|
1007
CALL
10x Genomics
TXG
$6.1B
| $8.46M | 0.01% |
205,100
+176,500
| +617% | +$9.18M |
|
1008
BP
BP
$113B
| $8.35M | 0.01% |
215,707
-112,016
| -34% | -$4.16M |
|
1009
CALL
Wolfspeed
WOLF
$1.35B
| $8.35M | 0.01% |
219,200
+31,900
| +17% | +$1.67M |
|
1010
CALL
Wheaton Precious Metals
WPM
$50B
| $8.34M | 0.01% |
255,500
-270,400
| -51% | -$11.7M |
|
1011
PUT
monday.com
MNDY
$3.03B
| $8.33M | 0.01% |
52,300
-16,600
| -24% | -$2.79M |
|
1012
CALL
Packaging Corp of America
PKG
$20.8B
| $8.28M | 0.01% |
53,900
+47,900
| +798% | +$6.99M |
|
1013
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.4M
| $8.28M | 0.01% |
196,100
+142,300
| +264% | +$5.17M |
|
1014
CALL
Harley-Davidson
HOG
$2.79B
| $8.24M | 0.01% |
249,300
+164,700
| +195% | +$5.73M |
|
1015
PUT
Hilton Worldwide
HLT
$72.9B
| $8.23M | 0.01% |
54,800
-2,400
| -4% | -$362K |
|
|
TWNK
1016
PUT
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $8.22M | 0.01% |
+246,900
| New | +$6.61M |
|
1017
PUT
Monolithic Power Systems
MPWR
$68.6B
| $8.22M | 0.01% |
17,800
+5,500
| +45% | +$2.81M |
|
1018
CALL
VeriSign
VRSN
$23.8B
| $8.22M | 0.01% |
40,600
+29,500
| +266% | +$6.13M |
|
1019
PUT
GE HealthCare
GEHC
$28.2B
| $8.22M | 0.01% |
120,800
+50,400
| +72% | +$3.67M |
|
1020
CALL
Lamb Weston
LW
$6.79B
| $8.22M | 0.01% |
88,900
+7,900
| +10% | +$801K |
|
1021
PUT
Bilibili
BILI
$7.32B
| $8.22M | 0.01% |
596,800
+72,300
| +14% | +$1.12M |
|
1022
PUT
Robinhood
HOOD
$91.2B
| $8.21M | 0.01% |
837,500
-448,500
| -35% | -$4.98M |
|
1023
CALL
Asbury Automotive
ABG
$4.14B
| $8.19M | 0.01% |
35,600
+29,900
| +525% | +$6.83M |
|
1024
CALL
Peloton Interactive
PTON
$2.61B
| $8.17M | 0.01% |
1,618,400
-271,300
| -14% | -$1.93M |
|
1025
PUT
PVH
PVH
$3.59B
| $8.17M | 0.01% |
106,800
+60,200
| +129% | +$4.98M |
|
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.