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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1976
Stryker
SYK
$127B
| $926K | ﹤0.01% |
5,213
-1,106
| -18% | -$189K |
|
1977
CALL
Aptiv
APTV
$12B
| $925K | ﹤0.01% |
115
+69
| +150% | +$6.3K |
|
|
MNDT
1978
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $921K | ﹤0.01% |
54,199
-27,050
| -33% | -$433K |
|
|
BID
1979
PUT
DELISTED
Sotheby's
BID
| $919K | ﹤0.01% |
187
+39
| +26% | +$1.97K |
|
1980
CVS Health
CVS
$137B
| $918K | ﹤0.01% |
11,670
-19,884
| -63% | -$1.42M |
|
|
MRSH
1981
PUT
Marsh
MRSH
$86.3B
| $918K | ﹤0.01% |
111
-45
| -29% | -$3.81K |
|
1982
PUT
Suncor Energy
SU
$77.7B
| $916K | ﹤0.01% |
237
+90
| +61% | +$3.64K |
|
1983
PUT
Navigator Holdings
NVGS
$1.34B
| $915K | ﹤0.01% |
757
+618
| +445% | +$7.59K |
|
1984
PUT
Credicorp
BAP
$30.9B
| $914K | ﹤0.01% |
41
+37
| +925% | +$8.28K |
|
1985
CALL
Fair Isaac
FICO
$28.7B
| $914K | ﹤0.01% |
40
-10
| -20% | -$2.17K |
|
|
BFYT
1986
PUT
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $912K | ﹤0.01% |
148
+20
| +16% | +$912 |
|
1987
PUT
Canadian Pacific Kansas City
CP
$82B
| $911K | ﹤0.01% |
215
-475
| -69% | -$19K |
|
|
IMMU
1988
DELISTED
Immunomedics Inc
IMMU
| $911K | ﹤0.01% |
43,761
-17,973
| -29% | -$426K |
|
1989
PUT
SandRidge Energy
SD
$510M
| $910K | ﹤0.01% |
+838
| New | +$12.8K |
|
1990
Teladoc Health
TDOC
$1.58B
| $910K | ﹤0.01% |
+10,549
| New | +$752K |
|
|
CELG
1991
DELISTED
Celgene Corp
CELG
| $909K | ﹤0.01% |
10,167
-115,491
| -92% | -$10.2M |
|
1992
CALL
Evolent Health
EVH
$475M
| $908K | ﹤0.01% |
320
+129
| +68% | +$3.08K |
|
1993
PUT
Onto Innovation
ONTO
$13.6B
| $907K | ﹤0.01% |
242
+217
| +868% | +$8.53K |
|
1994
PUT
Ryder
R
$10.3B
| $906K | ﹤0.01% |
124
+28
| +29% | +$2.13K |
|
1995
Chevron
CVX
$388B
| $905K | ﹤0.01% |
+7,407
| New | +$899K |
|
1996
Melco Resorts & Entertainment
MLCO
$2.1B
| $905K | ﹤0.01% |
42,815
+7,324
| +21% | +$170K |
|
1997
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $903K | ﹤0.01% |
76
-7
| -8% | -$852 |
|
|
MZOR
1998
PUT
DELISTED
Mazor Robotics Ltd.
MZOR
| $903K | ﹤0.01% |
155
+83
| +115% | +$4.43K |
|
1999
Precigen
PGEN
$1.93B
| $902K | ﹤0.01% |
+52,420
| New | +$780K |
|
2000
CALL
STMicroelectronics
STM
$46B
| $902K | ﹤0.01% |
492
+4
| +0.8% | +$83 |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.