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 | |
|---|---|---|---|---|---|---|
1026
CALL
CACI
CACI
$10.6B
| $8.16M | 0.01% |
26,000
+24,200
| +1,344% | +$8.09M |
|
1027
CALL
Cardinal Health
CAH
$52.9B
| $8.13M | 0.01% |
93,600
-91,000
| -49% | -$8.23M |
|
1028
CALL
Baker Hughes
BKR
$55.6B
| $8.12M | 0.01% |
230,000
+153,900
| +202% | +$5.45M |
|
1029
CALL
Sunrun
RUN
$2.48B
| $8.09M | 0.01% |
644,000
+195,300
| +44% | +$3.21M |
|
|
AYX
1030
DELISTED
Alteryx Inc
AYX
| $8.08M | 0.01% |
+214,276
| New | +$7.68M |
|
1031
PUT
Goodyear
GT
$2.02B
| $8.07M | 0.01% |
649,400
+41,400
| +7% | +$563K |
|
1032
CALL
PACCAR
PCAR
$68.8B
| $8.06M | 0.01% |
94,800
-79,400
| -46% | -$6.75M |
|
|
JWN
1033
PUT
DELISTED
Nordstrom
JWN
| $8.05M | 0.01% |
539,000
+145,600
| +37% | +$2.67M |
|
1034
CALL
Bilibili
BILI
$7.32B
| $8.05M | 0.01% |
584,500
+138,500
| +31% | +$2.14M |
|
1035
CALL
BridgeBio Pharma
BBIO
$16.2B
| $8.03M | 0.01% |
304,600
-36,200
| -11% | -$1.03M |
|
1036
CALL
Rambus
RMBS
$11.2B
| $8.03M | 0.01% |
143,900
-14,000
| -9% | -$794K |
|
1037
iShares MSCI Brazil ETF
EWZ
$9.16B
| $8.01M | 0.01% |
261,049
-93,332
| -26% | -$2.97M |
|
1038
PUT
DoubleVerify
DV
$1.59B
| $8M | 0.01% |
286,200
+63,400
| +28% | +$2.17M |
|
1039
PUT
Motorola Solutions
MSI
$67.6B
| $7.98M | 0.01% |
29,300
+21,900
| +296% | +$6.24M |
|
|
EXAS
1040
CALL
DELISTED
Exact Sciences
EXAS
| $7.97M | 0.01% |
116,900
-31,800
| -21% | -$2.7M |
|
1041
CALL
Whirlpool
WHR
$2.31B
| $7.97M | 0.01% |
59,600
+13,000
| +28% | +$1.84M |
|
1042
CALL
Steel Dynamics
STLD
$34.7B
| $7.97M | 0.01% |
74,300
-62,300
| -46% | -$6.49M |
|
|
TWO
1043
CALL
Two Harbors Investment
TWO
$1.27B
| $7.93M | 0.01% |
599,300
+300
| +0.1% | +$4.02K |
|
|
CMA
1044
PUT
DELISTED
Comerica
CMA
| $7.91M | 0.01% |
190,400
-73,100
| -28% | -$3.47M |
|
1045
Marvell Technology
MRVL
$188B
| $7.91M | 0.01% |
146,160
+141,825
| +3,272% | +$8.37M |
|
1046
PUT
IonQ
IONQ
$12.7B
| $7.89M | 0.01% |
530,100
+221,100
| +72% | +$3.47M |
|
1047
PUT
Freedom Holding
FRHC
$9.84B
| $7.89M | 0.01% |
93,100
+92,100
| +9,210% | +$7.8M |
|
1048
PUT
Cboe Global Markets
CBOE
$29.8B
| $7.87M | 0.01% |
50,400
-9,400
| -16% | -$1.38M |
|
1049
Constellation Brands
STZ
$22.1B
| $7.85M | 0.01% |
+31,225
| New | +$8.15M |
|
1050
PUT
Enterprise Products Partners
EPD
$83.9B
| $7.84M | 0.01% |
286,400
+76,800
| +37% | +$2.05M |
|
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.