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 | |
|---|---|---|---|---|---|---|
351
CALL
Marvell Technology
MRVL
$191B
| $19.9M | 0.03% |
4,196
+764
| +22% | +$33.1K |
|
352
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$247M
| $19.9M | 0.03% |
5,318
+2,807
| +112% | +$105K |
|
353
PUT
Southwest Airlines
LUV
$23.2B
| $19.9M | 0.03% |
4,263
-2,079
| -33% | -$90.1K |
|
354
PUT
Newmont
NEM
$102B
| $19.8M | 0.03% |
3,306
-2,037
| -38% | -$126K |
|
|
NKLA
355
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $19.8M | 0.03% |
432
+97
| +29% | +$60.4K |
|
356
CALL
TJX Companies
TJX
$171B
| $19.7M | 0.03% |
2,881
+759
| +36% | +$46.2K |
|
357
PUT
Oracle
ORCL
$361B
| $19.7M | 0.03% |
3,040
-826
| -21% | -$49.2K |
|
358
PUT
Dow Inc
DOW
$22.5B
| $19.6M | 0.03% |
3,528
-265
| -7% | -$13.7K |
|
359
CALL
Chewy
CHWY
$8.81B
| $19.6M | 0.03% |
2,176
+905
| +71% | +$66K |
|
360
PUT
Best Buy
BBY
$18.3B
| $19.5M | 0.03% |
1,956
+734
| +60% | +$82.1K |
|
361
PUT
Li Auto
LI
$12.1B
| $19.5M | 0.03% |
6,753
+4,374
| +184% | +$120K |
|
362
CALL
Prudential Financial
PRU
$41.2B
| $19.3M | 0.03% |
2,476
+1,708
| +222% | +$123K |
|
363
PUT
American International
AIG
$41.3B
| $19.3M | 0.03% |
5,099
-2,908
| -36% | -$102K |
|
364
PUT
Invesco Aerospace & Defense ETF
PPA
$8.01B
| $19.3M | 0.03% |
1,563
-464
| -23% | -$28.8K |
|
365
CALL
Sony
SONY
$123B
| $19.3M | 0.03% |
9,525
+1,200
| +14% | +$20.9K |
|
366
PUT
AstraZeneca
AZN
$262B
| $19.3M | 0.03% |
1,926
+662
| +52% | +$70.1K |
|
367
PUT
Intuit
INTU
$78.2B
| $19.2M | 0.02% |
505
+132
| +35% | +$46.4K |
|
368
CALL
Domino's
DPZ
$10.6B
| $19.1M | 0.02% |
498
+82
| +20% | +$32.2K |
|
369
CALL
Twilio
TWLO
$27.8B
| $19.1M | 0.02% |
564
-306
| -35% | -$95.6K |
|
370
Johnson & Johnson
JNJ
$612B
| $19M | 0.02% |
120,420
+40,062
| +50% | +$5.91M |
|
371
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $18.8M | 0.02% |
1,104
+591
| +115% | +$87.6K |
|
372
CALL
Kimberly-Clark
KMB
$36.2B
| $18.8M | 0.02% |
1,393
+399
| +40% | +$55.9K |
|
|
TYNS
373
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $18.7M | 0.02% |
3,077
-1,610
| -34% | -$9.8M |
|
374
CALL
SolarEdge
SEDG
$2.97B
| $18.7M | 0.02% |
585
+312
| +114% | +$86.2K |
|
375
PUT
T-Mobile US
TMUS
$207B
| $18.6M | 0.02% |
1,379
-248
| -15% | -$30.6K |
|
Similar funds
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.