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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PPL
1001
CALL
PPL Corp
PPL
$27.6B
| $3.16M | 0.01% |
995
+602
| +153% | +$18.7K |
|
|
DFS
1002
CALL
DELISTED
Discover Financial Services
DFS
| $3.15M | 0.01% |
443
+175
| +65% | +$12K |
|
1003
PUT
Exelon
EXC
$49B
| $3.15M | 0.01% |
880
+717
| +440% | +$24.4K |
|
1004
CALL
Ligand Pharmaceuticals
LGND
$6B
| $3.14M | 0.01% |
401
+348
| +657% | +$26.4K |
|
1005
PUT
Colgate-Palmolive
CL
$72.8B
| $3.13M | 0.01% |
457
-730
| -61% | -$47.2K |
|
1006
Stanley Black & Decker
SWK
$14B
| $3.12M | 0.01% |
22,915
+21,809
| +1,972% | +$2.84M |
|
|
STI
1007
PUT
DELISTED
SunTrust Banks, Inc.
STI
| $3.12M | 0.01% |
526
+188
| +56% | +$11.5K |
|
1008
Analog Devices
ADI
$179B
| $3.11M | 0.01% |
+29,584
| New | +$2.97M |
|
1009
PUT
National Healthcare
NHC
$3.53B
| $3.11M | 0.01% |
410
+371
| +951% | +$29.4K |
|
|
BBBY
1010
CALL
Bed Bath & Beyond
BBBY
$469M
| $3.11M | 0.01% |
2,490
+277
| +13% | +$3.79K |
|
1011
PUT
TD Synnex
SNX
$19.6B
| $3.11M | 0.01% |
652
+640
| +5,333% | +$30.3K |
|
1012
CALL
AptarGroup
ATR
$8.35B
| $3.11M | 0.01% |
292
+291
| +29,100% | +$29.1K |
|
1013
PUT
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $3.11M | 0.01% |
844
+249
| +42% | +$2.21K |
|
1014
PUT
Lamb Weston
LW
$6.72B
| $3.1M | 0.01% |
414
+343
| +483% | +$24.3K |
|
1015
CALL
General Dynamics
GD
$105B
| $3.1M | 0.01% |
183
-118
| -39% | -$19.9K |
|
1016
CALL
Trane Technologies
TT
$106B
| $3.09M | 0.01% |
286
+87
| +44% | +$8.81K |
|
|
SAFM
1017
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $3.08M | 0.01% |
234
+108
| +86% | +$12.9K |
|
1018
PUT
Factset
FDS
$8.87B
| $3.08M | 0.01% |
124
+118
| +1,967% | +$26.4K |
|
1019
PUT
PTC
PTC
$13.5B
| $3.04M | 0.01% |
330
+14
| +4% | +$1.24K |
|
|
COUP
1020
PUT
DELISTED
Coupa Software Incorporated
COUP
| $3.04M | 0.01% |
334
+211
| +172% | +$18.1K |
|
1021
CALL
Canadian Imperial Bank of Commerce
CM
$106B
| $3.04M | 0.01% |
768
-378
| -33% | -$15.7K |
|
1022
CALL
HDFC Bank
HDB
$120B
| $3.01M | 0.01% |
1,040
+188
| +22% | +$4.88K |
|
1023
PUT
Molson Coors Class B
TAP
$7.65B
| $3.01M | 0.01% |
505
+60
| +13% | +$3.7K |
|
1024
PUT
Dell
DELL
$282B
| $3.01M | 0.01% |
1,012
-1,691
| -63% | -$44.6K |
|
1025
CALL
Tyler Technologies
TYL
$12.3B
| $3M | 0.01% |
147
-239
| -62% | -$47.3K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.