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 | |
|---|---|---|---|---|---|---|
|
MASI
1001
PUT
DELISTED
Masimo
MASI
| $4.91M | 0.01% |
183
+165
| +917% | +$41.1K |
|
1002
PUT
Corning
GLW
$134B
| $4.91M | 0.01% |
1,363
+59
| +5% | +$2.1K |
|
1003
PUT
PagSeguro Digital
PAGS
$2.64B
| $4.87M | 0.01% |
857
+214
| +33% | +$9.61K |
|
1004
CALL
Healthpeak Properties
DOC
$15.2B
| $4.87M | 0.01% |
1,612
+958
| +146% | +$27.9K |
|
1005
Wheaton Precious Metals
WPM
$50B
| $4.87M | 0.01% |
116,748
+111,582
| +2,160% | +$4.98M |
|
1006
Albemarle
ALB
$13.8B
| $4.87M | 0.01% |
33,031
+22,441
| +212% | +$2.66M |
|
1007
CALL
Vanguard Dividend Appreciation ETF
VIG
$110B
| $4.87M | 0.01% |
345
+53
| +18% | +$7.18K |
|
1008
CALL
Diamondback Energy
FANG
$57.8B
| $4.87M | 0.01% |
1,006
+643
| +177% | +$23.8K |
|
1009
PUT
Verisk Analytics
VRSK
$25.3B
| $4.86M | 0.01% |
234
+185
| +378% | +$36K |
|
|
BNY
1010
CALL
Bank of New York Mellon
BNY
$109B
| $4.85M | 0.01% |
1,143
+234
| +26% | +$8.99K |
|
1011
PUT
Dominion Energy
D
$62.8B
| $4.85M | 0.01% |
645
-22
| -3% | -$1.75K |
|
1012
CALL
QuidelOrtho
QDEL
$1.13B
| $4.85M | 0.01% |
270
-50
| -16% | -$11.1K |
|
1013
PUT
GameStop
GME
$9.58B
| $4.85M | 0.01% |
10,292
-3,096
| -23% | -$10.7K |
|
1014
CALL
TAL Education Group
TAL
$5.74B
| $4.84M | 0.01% |
677
-173
| -20% | -$12.5K |
|
1015
CALL
Mid-America Apartment Communities
MAA
$15.5B
| $4.81M | 0.01% |
380
+372
| +4,650% | +$45.9K |
|
1016
CALL
Cintas
CTAS
$81.3B
| $4.81M | 0.01% |
544
+12
| +2% | +$1.04K |
|
1017
CALL
Reliance Steel & Aluminium
RS
$20.2B
| $4.79M | 0.01% |
400
+387
| +2,977% | +$44.7K |
|
1018
PUT
Tapestry
TPR
$28.1B
| $4.79M | 0.01% |
1,541
+89
| +6% | +$2.25K |
|
|
CMRC
1019
CALL
Commerce.com Inc Series 1
CMRC
$215M
| $4.77M | 0.01% |
743
-711
| -49% | -$56.8K |
|
1020
PUT
Agilent Technologies
A
$39.5B
| $4.76M | 0.01% |
402
+271
| +207% | +$30K |
|
1021
PUT
Copart
CPRT
$25.2B
| $4.76M | 0.01% |
1,496
+356
| +31% | +$10.4K |
|
1022
PUT
Sabre
SABR
$668M
| $4.76M | 0.01% |
3,959
-1,450
| -27% | -$13.4K |
|
1023
PUT
Silicon Motion
SIMO
$9.8B
| $4.76M | 0.01% |
988
+981
| +14,014% | +$40.1K |
|
|
KSU
1024
PUT
DELISTED
Kansas City Southern
KSU
| $4.76M | 0.01% |
233
-211
| -48% | -$39.6K |
|
1025
PUT
Consolidated Edison
ED
$41.6B
| $4.75M | 0.01% |
657
+107
| +19% | +$8.31K |
|
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.