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 | |
|---|---|---|---|---|---|---|
2001
Rollins
ROL
$18.6B
| $901K | ﹤0.01% |
+33,408
| New | +$862K |
|
|
AFSI
2002
CALL
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $901K | ﹤0.01% |
621
+211
| +51% | +$3.07K |
|
2003
CALL
Agnico Eagle Mines
AEM
$72.6B
| $899K | ﹤0.01% |
263
-347
| -57% | -$13.5K |
|
2004
CALL
SAP
SAP
$187B
| $897K | ﹤0.01% |
73
+69
| +1,725% | +$8.19K |
|
|
SIEN
2005
CALL
DELISTED
Sientra, Inc.
SIEN
| $897K | ﹤0.01% |
38
-69
| -64% | -$15.1K |
|
|
SKX
2006
CALL
DELISTED
Skechers
SKX
| $896K | ﹤0.01% |
321
+25
| +8% | +$724 |
|
|
SLCA
2007
CALL
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $896K | ﹤0.01% |
476
+143
| +43% | +$3.32K |
|
|
ENT
2008
CALL
DELISTED
Global Eagle Entertainment Inc.
ENT
| $896K | ﹤0.01% |
127
+106
| +505% | +$6.83K |
|
2009
AstraZeneca
AZN
$263B
| $895K | ﹤0.01% |
11,321
+4,388
| +63% | +$332K |
|
2010
Ciena
CIEN
$55.3B
| $895K | ﹤0.01% |
28,666
+22,404
| +358% | +$628K |
|
2011
CALL
McCormick & Company Non-Voting
MKC
$13.4B
| $895K | ﹤0.01% |
136
-190
| -58% | -$11.7K |
|
2012
PUT
Nexstar Media Group
NXST
$5.6B
| $895K | ﹤0.01% |
110
-52
| -32% | -$4.09K |
|
2013
BioMarin Pharmaceuticals
BMRN
$11.5B
| $894K | ﹤0.01% |
9,223
+2,175
| +31% | +$217K |
|
|
LPNT
2014
DELISTED
LifePoint Health, Inc.
LPNT
| $894K | ﹤0.01% |
13,894
+13,305
| +2,259% | +$811K |
|
|
WPX
2015
CALL
DELISTED
WPX Energy, Inc.
WPX
| $893K | ﹤0.01% |
444
+137
| +45% | +$2.54K |
|
2016
Yum China
YUMC
$14.9B
| $892K | ﹤0.01% |
+25,413
| New | +$905K |
|
|
COL
2017
CALL
DELISTED
Rockwell Collins
COL
| $884K | ﹤0.01% |
63
+59
| +1,475% | +$8.12K |
|
2018
CALL
J.M. Smucker
SJM
$12.6B
| $882K | ﹤0.01% |
86
-88
| -51% | -$9.61K |
|
2019
Talos Energy
TALO
$2.49B
| $882K | ﹤0.01% |
26,903
+12,992
| +93% | +$438K |
|
2020
PUT
AGCO
AGCO
$8.78B
| $881K | ﹤0.01% |
145
+53
| +58% | +$3.21K |
|
2021
Zoetis
ZTS
$31.6B
| $881K | ﹤0.01% |
9,632
-13,944
| -59% | -$1.24M |
|
2022
Ventas
VTR
$48.9B
| $880K | ﹤0.01% |
+16,195
| New | +$938K |
|
2023
CALL
HubSpot
HUBS
$10.5B
| $875K | ﹤0.01% |
58
-43
| -43% | -$5.91K |
|
2024
CALL
Revvity
RVTY
$12.3B
| $875K | ﹤0.01% |
90
+7
| +8% | +$601 |
|
2025
PUT
Toronto Dominion Bank
TD
$198B
| $875K | ﹤0.01% |
144
+74
| +106% | +$4.41K |
|
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.