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 | |
|---|---|---|---|---|---|---|
|
BZUN
1751
CALL
Baozun
BZUN
$143M
| $1.46M | ﹤0.01% |
442
+84
| +23% | +$3.33K |
|
1752
PUT
Yelp
YELP
$1.38B
| $1.46M | ﹤0.01% |
420
-133
| -24% | -$4.51K |
|
1753
CALL
BJ's Restaurants
BJRI
$1.41B
| $1.46M | ﹤0.01% |
385
+279
| +263% | +$10.7K |
|
1754
Shake Shack
SHAK
$2.3B
| $1.46M | ﹤0.01% |
+24,507
| New | +$1.76M |
|
1755
PUT
Envista
NVST
$4.28B
| $1.46M | ﹤0.01% |
+492
| New | +$14K |
|
|
FIT
1756
CALL
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $1.46M | ﹤0.01% |
2,215
+1,265
| +133% | +$7.42K |
|
|
EMBJ
1757
Embraer S.A. ADS
EMBJ
$11.6B
| $1.45M | ﹤0.01% |
74,637
+54,699
| +274% | +$962K |
|
|
CHL
1758
CALL
DELISTED
China Mobile Limited
CHL
| $1.45M | ﹤0.01% |
344
+221
| +180% | +$8.92K |
|
1759
PUT
Teradata
TDC
$2.68B
| $1.45M | ﹤0.01% |
543
+210
| +63% | +$5.84K |
|
1760
PUT
Sysco
SYY
$39.7B
| $1.45M | ﹤0.01% |
169
-78
| -32% | -$6.32K |
|
1761
CALL
Post Holdings
POST
$4.12B
| $1.44M | ﹤0.01% |
202
-1
| -0.5% | -$68 |
|
1762
CALL
Everest Group
EG
$15.2B
| $1.44M | ﹤0.01% |
52
+44
| +550% | +$11.6K |
|
1763
PUT
STMicroelectronics
STM
$46B
| $1.44M | ﹤0.01% |
535
-131
| -20% | -$3.1K |
|
1764
PUT
Supernus Pharmaceuticals
SUPN
$2.68B
| $1.44M | ﹤0.01% |
607
+245
| +68% | +$5.95K |
|
1765
Zoom
ZM
$25.8B
| $1.44M | ﹤0.01% |
+21,139
| New | +$1.45M |
|
|
SRCL
1766
PUT
DELISTED
Stericycle Inc
SRCL
| $1.44M | ﹤0.01% |
225
+76
| +51% | +$4.49K |
|
|
AAN.A
1767
PUT
DELISTED
The Aaron's Company Inc Class A
AAN.A
| $1.43M | ﹤0.01% |
251
+155
| +161% | +$885K |
|
1768
PUT
Sinclair Inc
SBGI
$974M
| $1.43M | ﹤0.01% |
429
-727
| -63% | -$27.1K |
|
|
BIG
1769
CALL
DELISTED
Big Lots, Inc.
BIG
| $1.43M | ﹤0.01% |
497
+113
| +29% | +$2.61K |
|
1770
PUT
Keurig Dr Pepper
KDP
$40.4B
| $1.42M | ﹤0.01% |
492
-9
| -2% | -$258 |
|
1771
CALL
Tenet Healthcare
THC
$20.1B
| $1.42M | ﹤0.01% |
374
-82
| -18% | -$2.46K |
|
1772
Corpay
CPAY
$24.2B
| $1.42M | ﹤0.01% |
+4,937
| New | +$1.46M |
|
1773
CALL
Norwegian Cruise Line
NCLH
$8.89B
| $1.42M | ﹤0.01% |
243
-40
| -14% | -$2.11K |
|
|
SINA
1774
CALL
DELISTED
Sina Corp
SINA
| $1.42M | ﹤0.01% |
355
+138
| +64% | +$5.29K |
|
1775
PUT
Allstate
ALL
$66.9B
| $1.42M | ﹤0.01% |
126
+12
| +11% | +$1.31K |
|
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.