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 | |
|---|---|---|---|---|---|---|
1726
PUT
Encompass Health
EHC
$11.2B
| $1.52M | ﹤0.01% |
275
+58
| +27% | +$3.15K |
|
1727
PUT
Vodafone
VOD
$34.9B
| $1.51M | ﹤0.01% |
784
-238
| -23% | -$4.74K |
|
1728
PUT
Charles River Laboratories
CRL
$10.9B
| $1.51M | ﹤0.01% |
99
+69
| +230% | +$9.55K |
|
1729
CALL
Voya Financial
VOYA
$8.94B
| $1.51M | ﹤0.01% |
248
-34
| -12% | -$1.92K |
|
|
AVYA
1730
PUT
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $1.51M | ﹤0.01% |
1,120
-100
| -8% | -$1.23K |
|
1731
CALL
Aptiv
APTV
$12B
| $1.51M | ﹤0.01% |
159
-133
| -46% | -$12.2K |
|
1732
Berkshire Hathaway Class B
BRK.B
$1.07T
| $1.51M | ﹤0.01% |
+6,667
| New | +$1.45M |
|
1733
CALL
Expeditors International
EXPD
$22.9B
| $1.5M | ﹤0.01% |
193
+188
| +3,760% | +$14.1K |
|
1734
CALL
PTC
PTC
$13.7B
| $1.5M | ﹤0.01% |
201
-392
| -66% | -$27.9K |
|
1735
CALL
Nutrien
NTR
$32.7B
| $1.5M | ﹤0.01% |
314
+207
| +193% | +$10K |
|
1736
CALL
Transocean
RIG
$5.92B
| $1.5M | ﹤0.01% |
2,184
+947
| +77% | +$4.88K |
|
|
RDS.B
1737
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $1.5M | ﹤0.01% |
+24,972
| New | +$1.47M |
|
1738
CALL
Fate Therapeutics
FATE
$281M
| $1.5M | ﹤0.01% |
764
+233
| +44% | +$3.7K |
|
1739
PUT
Toronto Dominion Bank
TD
$198B
| $1.49M | ﹤0.01% |
266
+173
| +186% | +$9.81K |
|
|
AL
1740
DELISTED
Air Lease Corp
AL
| $1.49M | ﹤0.01% |
+31,391
| New | +$1.41M |
|
1741
PUT
AGCO
AGCO
$8.78B
| $1.49M | ﹤0.01% |
193
+71
| +58% | +$5.45K |
|
|
GTT
1742
CALL
DELISTED
GTT Communications, Inc.
GTT
| $1.48M | ﹤0.01% |
1,306
+378
| +41% | +$3.16K |
|
1743
PUT
Exelixis
EXEL
$13.9B
| $1.48M | ﹤0.01% |
838
+350
| +72% | +$5.93K |
|
|
HOUS
1744
PUT
DELISTED
Anywhere Real Estate
HOUS
| $1.48M | ﹤0.01% |
1,525
+1,229
| +415% | +$11.3K |
|
1745
CALL
McCormick & Company Non-Voting
MKC
$13.4B
| $1.48M | ﹤0.01% |
174
+142
| +444% | +$11.8K |
|
1746
PUT
Children's Place
PLCE
$53.6M
| $1.48M | ﹤0.01% |
236
+110
| +87% | +$8.02K |
|
|
VISN
1747
PUT
Vistance Networks Inc
VISN
$2.66B
| $1.47M | ﹤0.01% |
1,037
+361
| +53% | +$4.68K |
|
1748
Marriott International
MAR
$98.7B
| $1.47M | ﹤0.01% |
+9,718
| New | +$1.3M |
|
|
MRO
1749
CALL
DELISTED
Marathon Oil Corporation
MRO
| $1.47M | ﹤0.01% |
1,083
-1,918
| -64% | -$23.4K |
|
|
BZUN
1750
PUT
Baozun
BZUN
$143M
| $1.47M | ﹤0.01% |
443
+177
| +67% | +$7.02K |
|
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.