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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1001
CALL
iQIYI
IQ
$1.17B
| $3.66M | 0.01% |
1,732
-1,869
| -52% | -$34.4K |
|
|
CRC
1002
PUT
DELISTED
California Resources Corporation
CRC
| $3.65M | 0.01% |
4,037
+2,248
| +126% | +$18.2K |
|
1003
PUT
WEX
WEX
$5.94B
| $3.64M | 0.01% |
174
-108
| -38% | -$21.7K |
|
1004
Sarepta Therapeutics
SRPT
$1.68B
| $3.64M | 0.01% |
+28,197
| New | +$2.85M |
|
1005
CALL
Consolidated Edison
ED
$41.6B
| $3.64M | 0.01% |
402
+307
| +323% | +$27.5K |
|
1006
PUT
Dominion Energy
D
$62.8B
| $3.63M | 0.01% |
438
-72
| -14% | -$5.88K |
|
1007
JPMorgan Chase
JPM
$930B
| $3.63M | 0.01% |
+26,006
| New | +$3.34M |
|
|
MOMO
1008
PUT
Hello Group
MOMO
$870M
| $3.62M | 0.01% |
1,082
-596
| -36% | -$21.2K |
|
1009
CALL
NovoCure
NVCR
$2.32B
| $3.62M | 0.01% |
430
+123
| +40% | +$9.93K |
|
|
CIT
1010
PUT
DELISTED
CIT Group Inc.
CIT
| $3.62M | 0.01% |
794
+368
| +86% | +$16.5K |
|
1011
Meta Platforms (Facebook)
META
$1.54T
| $3.6M | 0.01% |
17,564
+15,591
| +790% | +$3.02M |
|
1012
PUT
Papa John's
PZZA
$999M
| $3.6M | 0.01% |
571
+152
| +36% | +$9K |
|
1013
PUT
Liberty Global Class C
LBTYK
$3.37B
| $3.6M | 0.01% |
1,591
-226
| -12% | -$5.08K |
|
1014
PUT
NIO
NIO
$11.6B
| $3.59M | 0.01% |
8,941
-1,383
| -13% | -$2.78K |
|
1015
iShares US Transportation ETF
IYT
$2.33B
| $3.59M | 0.01% |
+73,484
| New | +$3.52M |
|
1016
Invesco S&P 500 Equal Weight ETF
RSP
$95.3B
| $3.59M | 0.01% |
31,015
+3,867
| +14% | +$430K |
|
1017
PUT
Knight Transportation
KNX
$11.8B
| $3.58M | 0.01% |
1,000
-31
| -3% | -$1.14K |
|
1018
CALL
Bank of Montreal
BMO
$124B
| $3.58M | 0.01% |
462
-202
| -30% | -$15.2K |
|
1019
CALL
NetApp
NTAP
$32.3B
| $3.57M | 0.01% |
574
-267
| -32% | -$15.6K |
|
1020
CALL
Energy Transfer Partners
ET
$70.3B
| $3.57M | 0.01% |
2,785
+958
| +52% | +$11.8K |
|
1021
Intuit
INTU
$77B
| $3.57M | 0.01% |
+13,623
| New | +$3.56M |
|
1022
PUT
Trip.com Group
TCOM
$27.1B
| $3.57M | 0.01% |
1,064
-1,095
| -51% | -$35.3K |
|
1023
CALL
VeriSign
VRSN
$23.8B
| $3.56M | 0.01% |
185
-39
| -17% | -$7.33K |
|
1024
CALL
Xerox
XRX
$341M
| $3.56M | 0.01% |
966
-423
| -30% | -$14.8K |
|
1025
Salesforce
CRM
$129B
| $3.55M | 0.01% |
21,837
-46,907
| -68% | -$7.35M |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.