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 | |
|---|---|---|---|---|---|---|
|
CATM
3001
PUT
DELISTED
Cardtronics plc Class A Ordinary Shares (UK)
CATM
| $702K | ﹤0.01% |
199
+98
| +97% | +$2.45K |
|
3002
CALL
Antero Midstream
AM
$10.6B
| $700K | ﹤0.01% |
908
-425
| -32% | -$2.88K |
|
3003
PUT
Royalty Pharma
RPRX
$26.2B
| $700K | ﹤0.01% |
140
+83
| +146% | +$3.52K |
|
3004
PUT
Idexx Laboratories
IDXX
$43.9B
| $699K | ﹤0.01% |
14
-15
| -52% | -$6.71K |
|
|
TIGR
3005
PUT
UP Fintech Holding
TIGR
$870M
| $699K | ﹤0.01% |
881
+610
| +225% | +$3.38K |
|
3006
CALL
Tradeweb Markets
TW
$21.7B
| $699K | ﹤0.01% |
112
-44
| -28% | -$2.66K |
|
3007
CALL
CenterPoint Energy
CNP
$28.8B
| $698K | ﹤0.01% |
323
+19
| +6% | +$421 |
|
3008
CALL
TechnipFMC
FTI
$29.7B
| $698K | ﹤0.01% |
999
+612
| +158% | +$3.6K |
|
3009
CALL
AES
AES
$10.6B
| $697K | ﹤0.01% |
297
-580
| -66% | -$12.1K |
|
3010
CALL
Huntsman Corp
HUN
$2.1B
| $696K | ﹤0.01% |
277
+169
| +156% | +$4.19K |
|
|
NSLR
3011
CALL
Neostellar Capital Corp
NSLR
$264M
| $696K | ﹤0.01% |
634
-83
| -12% | -$729 |
|
3012
CALL
United Natural Foods
UNFI
$2.97B
| $696K | ﹤0.01% |
436
-544
| -56% | -$9.1K |
|
3013
PUT
MasTec
MTZ
$25.5B
| $695K | ﹤0.01% |
102
+30
| +42% | +$1.68K |
|
3014
PUT
UGI
UGI
$7.95B
| $695K | ﹤0.01% |
199
+155
| +352% | +$5.42K |
|
3015
PUT
Vuzix
VUZI
$187M
| $695K | ﹤0.01% |
766
+576
| +303% | +$2.87K |
|
|
EQC
3016
PUT
DELISTED
Equity Commonwealth
EQC
| $695K | ﹤0.01% |
255
+173
| +211% | +$4.62K |
|
|
GRUB
3017
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $695K | ﹤0.01% |
4,686
-903
| -16% | -$133K |
|
3018
CALL
Principal Financial Group
PFG
$24B
| $694K | ﹤0.01% |
140
-173
| -55% | -$7.92K |
|
3019
PUT
Sasol
SSL
$7.36B
| $694K | ﹤0.01% |
784
-753
| -49% | -$5.64K |
|
3020
PUT
Calix
CALX
$2.29B
| $693K | ﹤0.01% |
233
+63
| +37% | +$1.55K |
|
3021
PUT
News Corp Class B
NWS
$16.8B
| $693K | ﹤0.01% |
386
+299
| +344% | +$4.81K |
|
3022
PUT
Pampa Energía
PAM
$4.6B
| $693K | ﹤0.01% |
503
+266
| +112% | +$3.41K |
|
3023
CALL
Vanguard FTSE Developed Markets ETF
VEA
$226B
| $693K | ﹤0.01% |
147
-67
| -31% | -$2.95K |
|
3024
CALL
CoreCivic
CXW
$3.09B
| $692K | ﹤0.01% |
1,057
+401
| +61% | +$2.88K |
|
|
LPRO
3025
PUT
Open Lending Corp
LPRO
$373M
| $692K | ﹤0.01% |
+198
| New | +$5.76K |
|
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.