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 | |
|---|---|---|---|---|---|---|
551
FedEx
FDX
$75.9B
| $10.9M | 0.01% |
+41,802
| New | +$11.6M |
|
552
PUT
McKesson
MCK
$95.3B
| $10.9M | 0.01% |
624
+205
| +49% | +$34.1K |
|
553
CALL
CME Group
CME
$90.1B
| $10.8M | 0.01% |
594
-658
| -53% | -$112K |
|
|
PPLC
554
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $10.8M | 0.01% |
1,582
-684
| -30% | -$4.67M |
|
555
Walt Disney
DIS
$166B
| $10.8M | 0.01% |
59,441
+59,091
| +16,883% | +$8.48M |
|
556
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.47B
| $10.8M | 0.01% |
183,825
+147,645
| +408% | +$7.48M |
|
557
CALL
Riot Platforms
RIOT
$8.84B
| $10.7M | 0.01% |
+6,319
| New | +$42K |
|
558
PUT
Estee Lauder
EL
$29.9B
| $10.7M | 0.01% |
403
-133
| -25% | -$32K |
|
559
Strategy Inc
MSTR
$36.5B
| $10.7M | 0.01% |
276,100
+194,530
| +238% | +$4.54M |
|
560
CALL
Lam Research
LRCX
$399B
| $10.7M | 0.01% |
2,270
-4,940
| -69% | -$208K |
|
|
MNDT
561
CALL
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $10.7M | 0.01% |
4,648
+3,650
| +366% | +$56.2K |
|
562
CALL
Hilton Worldwide
HLT
$73.8B
| $10.7M | 0.01% |
962
-35
| -4% | -$3.47K |
|
563
CALL
Northrop Grumman
NOC
$74.6B
| $10.7M | 0.01% |
351
+53
| +18% | +$16.2K |
|
564
CALL
Truist Financial
TFC
$63.2B
| $10.7M | 0.01% |
2,229
+909
| +69% | +$41.2K |
|
|
LSI
565
PUT
DELISTED
Life Storage, Inc.
LSI
| $10.6M | 0.01% |
1,335
+304
| +29% | +$23.2K |
|
566
PUT
Ball Corp
BALL
$16.6B
| $10.6M | 0.01% |
1,137
-173
| -13% | -$16K |
|
567
PUT
STMicroelectronics
STM
$58.7B
| $10.6M | 0.01% |
2,854
+429
| +18% | +$15.2K |
|
|
IRBT
568
CALL
DELISTED
iRobot
IRBT
| $10.6M | 0.01% |
1,316
+517
| +65% | +$42.1K |
|
569
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $10.6M | 0.01% |
15
-1
| -6% | -$6.19K |
|
570
PUT
L3Harris
LHX
$53.1B
| $10.5M | 0.01% |
556
+82
| +17% | +$15K |
|
571
NIO
NIO
$11.7B
| $10.5M | 0.01% |
215,619
+19,147
| +10% | +$741K |
|
572
CALL
Workhorse Group
WKHS
$30.4M
| $10.4M | 0.01% |
2
| – | – |
|
|
HZNP
573
CALL
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $10.4M | 0.01% |
1,417
+996
| +237% | +$74K |
|
574
CALL
D.R. Horton
DHI
$40B
| $10.3M | 0.01% |
1,501
+372
| +33% | +$27.1K |
|
575
PUT
NovoCure
NVCR
$1.8B
| $10.3M | 0.01% |
597
-232
| -28% | -$31.7K |
|
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.