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
|
+$102M |
| 2 |
TSMC
TSM
|
+$27.8M |
| 3 |
JPMorgan Chase
JPM
|
+$22.4M |
| 4 |
Boeing
BA
|
+$19.4M |
| 5 |
ExxonMobil
XOM
|
+$14.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$95.5M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$79.6M |
| 3 |
Tesla
TSLA
|
+$75.3M |
| 4 |
NVIDIA
NVDA
|
+$51.6M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.53% |
| 2 | Technology | 0.4% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.21% |
| 5 | Communication Services | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PUT
TAL Education Group
TAL
$5.73B
| $18.5M | 0.03% |
2,428
+221
| +10% | +$16.7K |
|
352
PUT
Western Digital
WDC
$192B
| $18.2M | 0.02% |
6,574
+2,780
| +73% | +$82.6K |
|
353
CALL
Fastly Inc
FSLY
$3.2B
| $18M | 0.02% |
1,920
-2
| -0.1% | -$174 |
|
354
PUT
DexCom
DXCM
$27.6B
| $17.9M | 0.02% |
1,740
+80
| +5% | +$8.36K |
|
355
PUT
Dow Inc
DOW
$22.5B
| $17.8M | 0.02% |
3,793
+1,992
| +111% | +$89.5K |
|
356
CALL
Clorox
CLX
$11.6B
| $17.8M | 0.02% |
845
-19
| -2% | -$4.23K |
|
357
PUT
DuPont de Nemours
DD
$18.9B
| $17.7M | 0.02% |
2,565
+818
| +47% | +$57.3K |
|
358
CALL
Domino's
DPZ
$10.6B
| $17.7M | 0.02% |
416
-210
| -34% | -$83.6K |
|
359
PUT
Tractor Supply
TSCO
$15.4B
| $17.5M | 0.02% |
6,110
+1,540
| +34% | +$44.3K |
|
360
CALL
Illumina
ILMN
$28.9B
| $17.4M | 0.02% |
580
+234
| +68% | +$80.6K |
|
|
361
ExxonMobil
XOM
$640B
| $17.4M | 0.02% |
505,900
+360,030
| +247% | +$14.7M |
|
362
CALL
Crown Castle
CCI
$33.8B
| $17.2M | 0.02% |
1,036
+197
| +23% | +$32.5K |
|
363
CALL
Southern Company
SO
$108B
| $17M | 0.02% |
3,138
+1,946
| +163% | +$104K |
|
364
CALL
Autodesk
ADSK
$43B
| $16.8M | 0.02% |
729
+113
| +18% | +$26.9K |
|
365
CALL
Sherwin-Williams
SHW
$78.9B
| $16.8M | 0.02% |
723
+222
| +44% | +$48.5K |
|
366
CALL
Enphase Energy
ENPH
$5.22B
| $16.6M | 0.02% |
2,015
+833
| +70% | +$55.8K |
|
367
PUT
S&P Global
SPGI
$127B
| $16.6M | 0.02% |
459
+181
| +65% | +$63.9K |
|
368
CALL
Honeywell
HON
$73.8B
| $16.4M | 0.02% |
1,061
+401
| +61% | +$59.6K |
|
|
DFS
369
PUT
DELISTED
Discover Financial Services
DFS
| $16.4M | 0.02% |
2,843
+1,131
| +66% | +$59.2K |
|
370
CALL
Caesars Entertainment
CZR
$6.1B
| $16.3M | 0.02% |
2,905
+543
| +23% | +$23.9K |
|
371
CALL
Skyworks Solutions
SWKS
$9.5B
| $16.1M | 0.02% |
1,104
-314
| -22% | -$43.7K |
|
|
372
PUT
Illumina
ILMN
$28.9B
| $16M | 0.02% |
531
+334
| +170% | +$115K |
|
|
TYNS
373
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $15.9M | 0.02% |
4,687
-859
| -15% | -$2.92M |
|
374
PUT
Blackstone
BX
$150B
| $15.8M | 0.02% |
3,020
-266
| -8% | -$14.2K |
|
|
IMMU
375
PUT
DELISTED
Immunomedics Inc
IMMU
| $15.5M | 0.02% |
1,821
+399
| +28% | +$20.2K |
|
Similar funds
Simplex Trading's Q3 2020 Portfolio in Review
As of Q3 2020, Simplex Trading held 9,056 positions worth $73.5B, up 17% from $62.7B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q3 2020 filing shows 1,403 new, 3,135 increased, 3,122 reduced and 1,191 closed positions. Its largest new stake was Goldman Sachs: 60,397 shares worth $12.1M. The largest sale was SPDR Gold Trust, an estimated $95.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.53% of assets, up from 0.47% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2020 buy was Goldman Sachs: 60,397 shares worth $12.1M.
- Simplex Trading added most to Amazon in Q3 2020, an estimated $102M increase.
- Simplex Trading's biggest Q3 2020 reduction was SPDR Gold Trust, cutting an estimated $95.5M.
- Simplex Trading fully exited iShares MSCI EAFE ETF in Q3 2020, selling an estimated $40.5M.
- Simplex Trading's ten largest holdings make up 43% of its $73.5B portfolio in Q3 2020.
- Simplex Trading opened 1,403 new positions and closed 1,191 in Q3 2020.
- Simplex Trading's portfolio value rose 17% quarter-over-quarter to $73.5B.
Based on Simplex Trading's 13F filing for Q3 2020, filed 14 Oct 2020.