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 | |
|---|---|---|---|---|---|---|
4201
CALL
Varonis Systems
VRNS
$4.67B
| $229K | ﹤0.01% |
7,500
-400
| -5% | -$11.8K |
|
|
TIO
4202
CALL
DELISTED
Tingo Group, Inc. Common Stock
TIO
| $229K | ﹤0.01% |
223,900
+138,900
| +163% | +$175K |
|
4203
PUT
Amkor Technology
AMKR
$10.6B
| $228K | ﹤0.01% |
10,100
+4,700
| +87% | +$124K |
|
4204
Pacer US Cash Cows 100 ETF
COWZ
$19B
| $228K | ﹤0.01% |
+4,628
| New | +$232K |
|
4205
PUT
Kontoor Brands
KTB
$4.71B
| $228K | ﹤0.01% |
5,200
+1,000
| +24% | +$43.8K |
|
4206
CALL
The RealReal
REAL
$1.41B
| $228K | ﹤0.01% |
108,400
+68,400
| +171% | +$167K |
|
|
NARI
4207
PUT
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $228K | ﹤0.01% |
3,500
+3,000
| +600% | +$189K |
|
4208
PUT
Ryan Specialty Holdings
RYAN
$6.02B
| $227K | ﹤0.01% |
4,700
+800
| +21% | +$37.1K |
|
4209
PUT
Popular Inc
BPOP
$11B
| $226K | ﹤0.01% |
3,600
+3,100
| +620% | +$205K |
|
4210
PUT
Cooper-Standard Automotive
CPS
$517M
| $226K | ﹤0.01% |
16,900
-6,900
| -29% | -$109K |
|
4211
CALL
Banco Santander
SAN
$191B
| $226K | ﹤0.01% |
60,200
-24,300
| -29% | -$92.2K |
|
|
4212
Banco Santander
SAN
$191B
| $226K | ﹤0.01% |
60,252
+36,634
| +155% | +$139K |
|
|
NVRO
4213
PUT
DELISTED
NEVRO CORP.
NVRO
| $226K | ﹤0.01% |
11,800
+2,400
| +26% | +$51.2K |
|
4214
PUT
Collegium Pharmaceutical
COLL
$1.18B
| $225K | ﹤0.01% |
10,100
| – | – |
|
4215
CALL
EyePoint Inc
EYPT
$999M
| $225K | ﹤0.01% |
28,200
+25,300
| +872% | +$277K |
|
|
PINC
4216
DELISTED
Premier
PINC
| $225K | ﹤0.01% |
+10,472
| New | +$261K |
|
|
NAAS
4217
CALL
NaaS Technology Inc
NAAS
$54.7M
| $224K | ﹤0.01% |
201
+165
| +458% | +$302K |
|
4218
CALL
The Bancorp
TBBK
$2.81B
| $224K | ﹤0.01% |
6,500
+2,200
| +51% | +$80.1K |
|
4219
CALL
Appian
APPN
$2.11B
| $223K | ﹤0.01% |
4,900
-3,300
| -40% | -$158K |
|
4220
Roundhill Generative AI & Technology ETF
CHAT
$1.58B
| $223K | ﹤0.01% |
8,298
-4,029
| -33% | -$115K |
|
|
ESPR
4221
CALL
DELISTED
Esperion Therapeutics
ESPR
| $223K | ﹤0.01% |
227,900
+7,000
| +3% | +$10.1K |
|
4222
CALL
Goosehead Insurance
GSHD
$1.68B
| $223K | ﹤0.01% |
3,000
+2,900
| +2,900% | +$195K |
|
4223
PUT
AquaBounty Technologies
AQB
$4.73M
| $222K | ﹤0.01% |
4,950
| – | – |
|
4224
PUT
Columbia Sportswear
COLM
$3.25B
| $222K | ﹤0.01% |
3,000
-3,900
| -57% | -$290K |
|
4225
Primerica
PRI
$10.1B
| $222K | ﹤0.01% |
1,146
-267
| -19% | -$54.7K |
|
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.