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 | |
|---|---|---|---|---|---|---|
|
26
PUT
Netflix
NFLX
$286B
| $405M | 0.53% |
74,980
+160
| +0.2% | +$8.11K |
|
27
PUT
Chipotle Mexican Grill
CMG
$42.7B
| $395M | 0.51% |
142,250
+38,100
| +37% | +$999K |
|
28
PUT
Boeing
BA
$161B
| $327M | 0.42% |
15,261
+716
| +5% | +$138K |
|
29
CALL
NVIDIA
NVDA
$5.02T
| $314M | 0.41% |
240,200
-201,240
| -46% | -$2.69M |
|
|
30
CALL
Netflix
NFLX
$286B
| $312M | 0.4% |
57,710
-30,170
| -34% | -$1.53M |
|
|
XYZ
31
PUT
Block Inc
XYZ
$47.8B
| $309M | 0.4% |
14,197
-1,121
| -7% | -$219K |
|
32
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $269M | 0.35% |
8,800
-2,529
| -22% | -$736K |
|
33
PUT
Advanced Micro Devices
AMD
$888B
| $266M | 0.34% |
29,010
-122
| -0.4% | -$10.5K |
|
34
PUT
Shopify
SHOP
$160B
| $253M | 0.33% |
22,380
+1,430
| +7% | +$150K |
|
|
35
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $245M | 0.32% |
8,003
+116
| +1% | +$33.8K |
|
|
36
CALL
Boeing
BA
$161B
| $236M | 0.31% |
11,033
-3,684
| -25% | -$708K |
|
37
PUT
PayPal
PYPL
$49.3B
| $234M | 0.3% |
9,983
+1,379
| +16% | +$286K |
|
38
CALL
Walt Disney
DIS
$167B
| $222M | 0.29% |
12,232
-1,160
| -9% | -$167K |
|
|
39
CALL
Advanced Micro Devices
AMD
$888B
| $219M | 0.28% |
26,206
-2,458
| -9% | -$212K |
|
40
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $217M | 0.28% |
43,806
-3,401
| -7% | -$127K |
|
|
41
CALL
iShares Silver Trust
SLV
$28.4B
| $216M | 0.28% |
87,941
-221
| -0.3% | -$5.03K |
|
42
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $210M | 0.27% |
9,060
+2,559
| +39% | +$564K |
|
|
43
PUT
Walt Disney
DIS
$167B
| $209M | 0.27% |
11,531
-1,681
| -13% | -$241K |
|
|
44
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $207M | 0.27% |
35,598
-7,550
| -17% | -$282K |
|
|
45
CALL
Shopify
SHOP
$160B
| $204M | 0.26% |
18,060
+4,630
| +34% | +$486K |
|
46
PUT
Salesforce
CRM
$139B
| $203M | 0.26% |
9,138
+1,448
| +19% | +$352K |
|
47
PUT
NIO
NIO
$12B
| $199M | 0.26% |
40,856
+13,521
| +49% | +$523K |
|
48
PUT
Peloton Interactive
PTON
$2.75B
| $199M | 0.26% |
13,102
-1,797
| -12% | -$219K |
|
49
PUT
Visa
V
$677B
| $190M | 0.25% |
8,708
-609
| -7% | -$125K |
|
50
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $187M | 0.24% |
31,083
+4,528
| +17% | +$581K |
|
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.