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 | |
|---|---|---|---|---|---|---|
|
PVBC
4376
DELISTED
Provident Bancorp
PVBC
| $196K | ﹤0.01% |
20,272
-28,695
| -59% | -$272K |
|
|
FREE
4377
CALL
DELISTED
Whole Earth Brands, Inc. Class A Common Stock
FREE
| $196K | ﹤0.01% |
54,500
| – | – |
|
4378
CALL
Green Brick Partners
GRBK
$3.09B
| $195K | ﹤0.01% |
4,700
+500
| +12% | +$25K |
|
|
PBT
4379
CALL
Permian Basin Royalty Trust
PBT
$1.36B
| $195K | ﹤0.01% |
9,200
+6,700
| +268% | +$152K |
|
4380
PUT
PagerDuty
PD
$830M
| $195K | ﹤0.01% |
8,700
-1,700
| -16% | -$40.6K |
|
4381
CALL
UWM Holdings
UWMC
$672M
| $195K | ﹤0.01% |
40,300
-106,400
| -73% | -$613K |
|
4382
CALL
CVRx
CVRX
$131M
| $194K | ﹤0.01% |
12,800
+10,600
| +482% | +$174K |
|
4383
PUT
Intapp
INTA
$2.44B
| $194K | ﹤0.01% |
5,800
+5,500
| +1,833% | +$201K |
|
4384
PUT
Legend Biotech
LEGN
$3.65B
| $194K | ﹤0.01% |
2,900
-400
| -12% | -$27.8K |
|
4385
PUT
SkyWater Technology
SKYT
$1.5B
| $194K | ﹤0.01% |
32,300
+18,900
| +141% | +$143K |
|
4386
Valaris
VAL
$5.14B
| $194K | ﹤0.01% |
+2,591
| New | +$190K |
|
4387
PUT
Brookfield Renewable
BEP
$9.6B
| $193K | ﹤0.01% |
8,900
+900
| +11% | +$24.2K |
|
4388
CALL
Buckle
BKE
$2.32B
| $193K | ﹤0.01% |
5,800
-5,100
| -47% | -$179K |
|
4389
Jefferies Financial Group
JEF
$12.7B
| $193K | ﹤0.01% |
+5,293
| New | +$190K |
|
|
KW
4390
CALL
DELISTED
Kennedy-Wilson Holdings
KW
| $193K | ﹤0.01% |
13,100
-700
| -5% | -$11.3K |
|
|
LPRO
4391
CALL
Open Lending Corp
LPRO
$372M
| $193K | ﹤0.01% |
26,500
+21,600
| +441% | +$198K |
|
4392
PUT
Origin Bancorp
OBK
$1.7B
| $193K | ﹤0.01% |
+6,700
| New | +$205K |
|
4393
CALL
Prothena Corp
PRTA
$448M
| $193K | ﹤0.01% |
4,000
+1,500
| +60% | +$89.1K |
|
|
SLCA
4394
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $193K | ﹤0.01% |
13,782
+5,789
| +72% | +$75.7K |
|
4395
CALL
ProFrac Holding
ACDC
$653M
| $192K | ﹤0.01% |
17,700
+800
| +5% | +$9.26K |
|
4396
PUT
Compass Minerals
CMP
$1.23B
| $192K | ﹤0.01% |
6,900
+6,800
| +6,800% | +$219K |
|
4397
CALL
Invesco DB Commodity Index Tracking Fund
DBC
$1.69B
| $192K | ﹤0.01% |
7,700
-49,100
| -86% | -$1.2M |
|
|
DHC
4398
CALL
Diversified Healthcare Trust
DHC
$2.15B
| $192K | ﹤0.01% |
99,100
+89,100
| +891% | +$226K |
|
4399
PUT
Park Hotels & Resorts
PK
$3.08B
| $192K | ﹤0.01% |
15,600
-2,200
| -12% | -$28.4K |
|
4400
Pinnacle West Capital
PNW
$12.4B
| $192K | ﹤0.01% |
+2,608
| New | +$207K |
|
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.