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 | |
|---|---|---|---|---|---|---|
701
CALL
Synopsys
SNPS
$72.3B
| $7.78M | 0.01% |
300
+102
| +52% | +$23.5K |
|
702
PUT
Strategy Inc
MSTR
$36.5B
| $7.77M | 0.01% |
+2,000
| New | +$46.7K |
|
703
PUT
Check Point Software Technologies
CHKP
$13.3B
| $7.74M | 0.01% |
582
+255
| +78% | +$31.2K |
|
704
CALL
Ferrari
RACE
$65.4B
| $7.73M | 0.01% |
337
+157
| +87% | +$32K |
|
705
CALL
Boston Scientific
BSX
$63.9B
| $7.67M | 0.01% |
2,134
+1,328
| +165% | +$47.9K |
|
706
CALL
KLA
KLAC
$280B
| $7.66M | 0.01% |
2,960
+530
| +22% | +$12.4K |
|
707
CALL
Alcoa
AA
$12.2B
| $7.66M | 0.01% |
3,324
+1,417
| +74% | +$24.7K |
|
708
CALL
Emerson Electric
EMR
$78.2B
| $7.65M | 0.01% |
952
-139
| -13% | -$10.3K |
|
709
CALL
Akamai
AKAM
$18.1B
| $7.62M | 0.01% |
726
-85
| -10% | -$8.9K |
|
710
PUT
Canadian Solar
CSIQ
$1.05B
| $7.61M | 0.01% |
1,486
+4
| +0.3% | +$164 |
|
711
PUT
Stanley Black & Decker
SWK
$13.9B
| $7.61M | 0.01% |
426
+133
| +45% | +$23.6K |
|
712
CALL
Nutanix
NTNX
$14.4B
| $7.59M | 0.01% |
2,383
+307
| +15% | +$8.33K |
|
713
CALL
Dell
DELL
$285B
| $7.59M | 0.01% |
2,044
+357
| +21% | +$12.4K |
|
714
PUT
KE Holdings
BEKE
$17.8B
| $7.59M | 0.01% |
1,233
+1,061
| +617% | +$70.5K |
|
715
State Street Financial Select Sector SPDR ETF
XLF
$55.3B
| $7.55M | 0.01% |
256,271
-113,222
| -31% | -$3.03M |
|
716
CALL
Fiverr
FVRR
$377M
| $7.53M | 0.01% |
386
+151
| +64% | +$27.3K |
|
717
Las Vegas Sands
LVS
$30B
| $7.52M | 0.01% |
126,188
-107,727
| -46% | -$5.74M |
|
|
ACB
718
CALL
Aurora Cannabis
ACB
$165M
| $7.52M | 0.01% |
905
+188
| +26% | +$13.7K |
|
719
PUT
Equity Residential
EQR
$25.6B
| $7.5M | 0.01% |
1,266
-194
| -13% | -$11K |
|
720
PUT
Fidelity National Information Services
FIS
$21B
| $7.5M | 0.01% |
530
+319
| +151% | +$45.5K |
|
721
CALL
McKesson
MCK
$95.3B
| $7.5M | 0.01% |
431
-294
| -41% | -$49K |
|
722
Norwegian Cruise Line
NCLH
$8.87B
| $7.47M | 0.01% |
293,647
-21,625
| -7% | -$451K |
|
723
iShares Russell 2000 ETF
IWM
$81.6B
| $7.46M | 0.01% |
38,039
+36,039
| +1,802% | +$6.31M |
|
724
CALL
FuboTV Inc
FUBO
$265M
| $7.46M | 0.01% |
+222
| New | +$60.8K |
|
725
PUT
Petrobras
PBR
$122B
| $7.46M | 0.01% |
6,640
-1,979
| -23% | -$17.6K |
|
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.