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 | |
|---|---|---|---|---|---|---|
|
SKE
6151
CALL
Skeena Resources
SKE
$3.3B
| $34K | ﹤0.01% |
7,400
+2,800
| +61% | +$13.6K |
|
6152
PUT
Sun Life Financial
SLF
$46B
| $34K | ﹤0.01% |
700
| – | – |
|
6153
CALL
Simply Good Foods
SMPL
$901M
| $34K | ﹤0.01% |
1,000
+500
| +100% | +$18K |
|
6154
Teucrium Soybean Fund
SOYB
$61M
| $34K | ﹤0.01% |
1,277
-7,895
| -86% | -$221K |
|
6155
CALL
Vontier
VNT
$4.52B
| $34K | ﹤0.01% |
1,100
-7,700
| -88% | -$237K |
|
6156
CALL
Dentsply Sirona
XRAY
$2.68B
| $34K | ﹤0.01% |
1,000
-32,200
| -97% | -$1.22M |
|
|
TBNK
6157
DELISTED
Territorial Bancorp Inc.
TBNK
| $34K | ﹤0.01% |
+3,848
| New | +$42.7K |
|
|
KLR
6158
DELISTED
Kaleyra, Inc.
KLR
| $34K | ﹤0.01% |
4,828
+1,755
| +57% | +$12K |
|
6159
ACI Worldwide
ACIW
$5.83B
| $33K | ﹤0.01% |
+1,501
| New | +$35.1K |
|
6160
Anika Therapeutics
ANIK
$258M
| $33K | ﹤0.01% |
1,775
+1,580
| +810% | +$32.8K |
|
6161
CALL
ASE Group
ASX
$77.3B
| $33K | ﹤0.01% |
+4,400
| New | +$34.2K |
|
6162
PUT
Avnet
AVT
$7.29B
| $33K | ﹤0.01% |
700
-500
| -42% | -$24.1K |
|
6163
CALL
BARK
BARK
$81.8M
| $33K | ﹤0.01% |
1,415
-15
| -1% | -$417 |
|
6164
CALL
CarGurus
CARG
$3.27B
| $33K | ﹤0.01% |
1,900
+800
| +73% | +$15.8K |
|
6165
Compass Minerals
CMP
$1.23B
| $33K | ﹤0.01% |
+1,187
| New | +$38.2K |
|
6166
Cricut
CRCT
$984M
| $33K | ﹤0.01% |
3,607
-2,556
| -41% | -$27K |
|
6167
Dynagas LNG Partners
DLNG
$132M
| $33K | ﹤0.01% |
12,283
-3,228
| -21% | -$8.91K |
|
6168
eGain
EGAN
$187M
| $33K | ﹤0.01% |
+5,483
| New | +$36.9K |
|
6169
CALL
Edgewell Personal Care
EPC
$1.25B
| $33K | ﹤0.01% |
900
-4,900
| -84% | -$189K |
|
6170
State Street SPDR S&P Regional Banking ETF
KRE
$4.5B
| $33K | ﹤0.01% |
+805
| New | +$35.9K |
|
6171
PUT
MDU Resources
MDU
$4.17B
| $33K | ﹤0.01% |
3,069
+1,625
| +113% | +$18.7K |
|
6172
PUT
Mitsubishi UFJ Financial
MUFG
$253B
| $33K | ﹤0.01% |
3,900
+3,600
| +1,200% | +$28.7K |
|
|
ODV
6173
DELISTED
Osisko Development Corp
ODV
| $33K | ﹤0.01% |
11,344
+9,659
| +573% | +$35.9K |
|
6174
CALL
Precigen
PGEN
$2.24B
| $33K | ﹤0.01% |
23,700
+15,000
| +172% | +$21.3K |
|
|
PPBI
6175
DELISTED
Pacific Premier Bancorp
PPBI
| $33K | ﹤0.01% |
+1,544
| New | +$35.5K |
|
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.