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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
PUT
Okta
OKTA
$23.9B
| $22.6M | 0.03% |
887
-245
| -22% | -$58.2K |
|
327
PUT
Align Technology
ALGN
$12.4B
| $22.5M | 0.03% |
421
+134
| +47% | +$60.2K |
|
328
PUT
Becton Dickinson
BDX
$42.1B
| $22.5M | 0.03% |
921
+727
| +375% | +$170K |
|
329
CALL
Carvana
CVNA
$45.5B
| $22.4M | 0.03% |
4,680
-150
| -3% | -$6.86K |
|
330
PUT
Blackstone
BX
$150B
| $22.4M | 0.03% |
3,457
+437
| +14% | +$25.4K |
|
331
CALL
Datadog
DDOG
$87.1B
| $22.2M | 0.03% |
2,256
-1,051
| -32% | -$105K |
|
332
PUT
Zillow
Z
$7.2B
| $22.1M | 0.03% |
1,698
+687
| +68% | +$76K |
|
|
UCD
333
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $22.1M | 0.03% |
15,810
-1,281
| -7% | -$1.79M |
|
334
CALL
Electronic Arts
EA
$52.4B
| $22M | 0.03% |
1,533
+381
| +33% | +$49.1K |
|
335
PUT
Albemarle
ALB
$13.9B
| $21.6M | 0.03% |
1,464
+601
| +70% | +$71.4K |
|
336
CALL
Western Digital
WDC
$192B
| $21.5M | 0.03% |
5,141
-24
| -0.5% | -$797 |
|
|
COUP
337
PUT
DELISTED
Coupa Software Incorporated
COUP
| $21.5M | 0.03% |
635
-46
| -7% | -$14.2K |
|
338
PUT
United Rentals
URI
$64.7B
| $21.5M | 0.03% |
926
+184
| +25% | +$38.9K |
|
339
Walmart Inc
WMT
$867B
| $21.4M | 0.03% |
444,621
+397,827
| +850% | +$19.3M |
|
340
CALL
Atlassian
TEAM
$21.8B
| $21M | 0.03% |
900
-382
| -30% | -$80.7K |
|
341
PUT
Palo Alto Networks
PANW
$273B
| $21M | 0.03% |
3,552
-96
| -3% | -$4.49K |
|
342
CALL
NXP Semiconductors
NXPI
$70.4B
| $21M | 0.03% |
1,322
-351
| -21% | -$51.7K |
|
343
PUT
Norwegian Cruise Line
NCLH
$8.91B
| $21M | 0.03% |
8,248
-711
| -8% | -$14.8K |
|
344
CALL
Union Pacific
UNP
$173B
| $20.8M | 0.03% |
1,000
-337
| -25% | -$67.3K |
|
|
RAD
345
CALL
DELISTED
Rite Aid Corporation
RAD
| $20.8M | 0.03% |
13,112
+1,462
| +13% | +$18.8K |
|
346
PUT
Marvell Technology
MRVL
$191B
| $20.7M | 0.03% |
4,358
+996
| +30% | +$43.1K |
|
347
CALL
Gaotu Techedu
GOTU
$398M
| $20.4M | 0.03% |
3,944
-431
| -10% | -$31.4K |
|
348
PUT
NextEra Energy
NEE
$187B
| $20.4M | 0.03% |
2,640
-1,360
| -34% | -$102K |
|
349
CALL
Skyworks Solutions
SWKS
$9.47B
| $20.3M | 0.03% |
1,327
+223
| +20% | +$32.6K |
|
350
CALL
Regeneron Pharmaceuticals
REGN
$68.5B
| $20M | 0.03% |
414
+290
| +234% | +$157K |
|
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Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.