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 | |
|---|---|---|---|---|---|---|
1876
PUT
Spectrum Brands
SPB
$2.04B
| $2.56M | ﹤0.01% |
32,700
-207,800
| -86% | -$16.4M |
|
1877
Cheniere Energy
LNG
$56.5B
| $2.56M | ﹤0.01% |
15,423
-4,084
| -21% | -$659K |
|
1878
PUT
Woodward
WWD
$25B
| $2.56M | ﹤0.01% |
+20,600
| New | +$2.57M |
|
1879
CALL
Bright Horizons
BFAM
$3.99B
| $2.56M | ﹤0.01% |
+31,400
| New | +$2.9M |
|
|
VTLE
1880
CALL
DELISTED
Vital Energy
VTLE
| $2.55M | ﹤0.01% |
46,100
+8,900
| +24% | +$478K |
|
1881
PUT
SentinelOne
S
$6.22B
| $2.55M | ﹤0.01% |
151,400
-47,400
| -24% | -$749K |
|
|
SPWR
1882
CALL
DELISTED
SunPower Corporation Common Stock
SPWR
| $2.55M | ﹤0.01% |
413,500
+157,700
| +62% | +$1.3M |
|
|
LTHM
1883
CALL
DELISTED
Livent Corporation
LTHM
| $2.55M | ﹤0.01% |
138,600
-26,500
| -16% | -$606K |
|
|
ETRN
1884
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $2.54M | ﹤0.01% |
271,150
-64,824
| -19% | -$619K |
|
1885
PUT
Ollie's Bargain Outlet
OLLI
$4.01B
| $2.54M | ﹤0.01% |
32,900
-17,300
| -34% | -$1.26M |
|
1886
PUT
Boot Barn
BOOT
$4.55B
| $2.53M | ﹤0.01% |
31,200
+21,200
| +212% | +$1.91M |
|
1887
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$863M
| $2.53M | ﹤0.01% |
94,949
+72,682
| +326% | +$2.39M |
|
1888
American Eagle Outfitters
AEO
$2.85B
| $2.53M | ﹤0.01% |
152,371
+115,418
| +312% | +$1.71M |
|
1889
CALL
Clean Harbors
CLH
$16.1B
| $2.53M | ﹤0.01% |
15,100
+1,200
| +9% | +$202K |
|
1890
CALL
Opendoor
OPEN
$3.69B
| $2.53M | ﹤0.01% |
989,003
+73,470
| +8% | +$265K |
|
1891
PUT
Textron
TXT
$16.6B
| $2.52M | ﹤0.01% |
32,300
+26,600
| +467% | +$1.98M |
|
1892
CALL
Sphere Entertainment
SPHR
$4.88B
| $2.51M | ﹤0.01% |
68,000
+16,900
| +33% | +$623K |
|
1893
PUT
American Water Works
AWK
$26.3B
| $2.51M | ﹤0.01% |
20,300
+7,400
| +57% | +$1.04M |
|
1894
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $2.51M | ﹤0.01% |
53,500
+4,400
| +9% | +$201K |
|
1895
PUT
Range Resources
RRC
$9.11B
| $2.51M | ﹤0.01% |
77,400
-67,200
| -46% | -$2.1M |
|
|
NKLA
1896
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $2.51M | ﹤0.01% |
53,227
+23,470
| +79% | +$1.22M |
|
1897
CALL
Chemours
CC
$2.59B
| $2.5M | ﹤0.01% |
89,300
-17,700
| -17% | -$608K |
|
1898
CALL
Immunovant
IMVT
$8.09B
| $2.5M | ﹤0.01% |
65,200
+59,000
| +952% | +$1.33M |
|
1899
CALL
Royalty Pharma
RPRX
$26.1B
| $2.5M | ﹤0.01% |
92,200
-66,500
| -42% | -$1.98M |
|
|
ANSS
1900
PUT
DELISTED
Ansys
ANSS
| $2.5M | ﹤0.01% |
8,400
-27,500
| -77% | -$8.71M |
|
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.