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 | |
|---|---|---|---|---|---|---|
501
PUT
Ford
F
$57.5B
| $12.1M | 0.02% |
13,821
+1,311
| +10% | +$11K |
|
|
HES
502
CALL
DELISTED
Hess
HES
| $12.1M | 0.02% |
2,300
+1,094
| +91% | +$49.7K |
|
503
CALL
MetLife
MET
$60B
| $12.1M | 0.02% |
2,579
-231
| -8% | -$10K |
|
504
PUT
Valero Energy
VLO
$92.3B
| $12.1M | 0.02% |
2,136
+923
| +76% | +$45.3K |
|
505
PUT
GE Aerospace
GE
$354B
| $12.1M | 0.02% |
2,244
-523
| -19% | -$23.4K |
|
506
CALL
Lennar Class B
LEN.B
$19.4B
| $12M | 0.02% |
1,662
+451
| +37% | +$26.7K |
|
507
PUT
Phillips 66
PSX
$84.8B
| $12M | 0.02% |
1,721
+637
| +59% | +$37.4K |
|
508
CALL
DoorDash
DASH
$77.4B
| $12M | 0.02% |
+843
| New | +$135K |
|
509
PUT
Kohl's
KSS
$2.16B
| $12M | 0.02% |
2,941
+398
| +16% | +$11.6K |
|
510
Lockheed Martin
LMT
$119B
| $11.9M | 0.02% |
33,653
+5,465
| +19% | +$2.01M |
|
511
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $11.9M | 0.02% |
2,982
+1,533
| +106% | +$39.9K |
|
|
ALXN
512
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $11.9M | 0.02% |
+763
| New | +$98K |
|
513
PUT
Vale
VALE
$63.2B
| $11.9M | 0.02% |
7,096
+1,328
| +23% | +$17.7K |
|
514
PUT
International Flavors & Fragrances
IFF
$19.7B
| $11.9M | 0.02% |
1,091
+193
| +21% | +$21.7K |
|
|
IRBT
515
PUT
DELISTED
iRobot
IRBT
| $11.9M | 0.02% |
1,479
+271
| +22% | +$22.1K |
|
516
Marvell Technology
MRVL
$189B
| $11.9M | 0.02% |
249,751
+150,593
| +152% | +$6.52M |
|
517
PUT
Norfolk Southern
NSC
$74.3B
| $11.9M | 0.02% |
499
+290
| +139% | +$66K |
|
518
CALL
AB InBev
BUD
$160B
| $11.8M | 0.02% |
1,691
-545
| -24% | -$34.5K |
|
519
lululemon athletica
LULU
$12.9B
| $11.8M | 0.02% |
33,968
+19,756
| +139% | +$6.86M |
|
520
PUT
Ferrari
RACE
$65.4B
| $11.8M | 0.02% |
513
-89
| -15% | -$18.2K |
|
521
CALL
Unity
U
$12.8B
| $11.8M | 0.02% |
767
+696
| +980% | +$84.6K |
|
522
CALL
PNC Financial Services
PNC
$101B
| $11.8M | 0.02% |
789
-87
| -10% | -$11.1K |
|
523
Booking.com
BKNG
$138B
| $11.7M | 0.02% |
131,325
+106,875
| +437% | +$8.25M |
|
524
PUT
General Dynamics
GD
$101B
| $11.6M | 0.02% |
782
+540
| +223% | +$78.9K |
|
525
PUT
Teradyne
TER
$57.8B
| $11.6M | 0.02% |
970
-122
| -11% | -$12.5K |
|
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.