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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1151
Trade Desk
TTD
$8.13B
| $1.83M | 0.01% |
+157,510
| New | +$1.97M |
|
1152
CALL
LivaNova
LIVN
$4.3B
| $1.82M | 0.01% |
199
+84
| +73% | +$9.02K |
|
1153
CALL
Royal Gold
RGLD
$17.1B
| $1.81M | 0.01% |
212
-220
| -51% | -$16.9K |
|
1154
CALL
Trane Technologies
TT
$106B
| $1.81M | 0.01% |
199
+8
| +4% | +$786 |
|
1155
Ionis Pharmaceuticals
IONS
$9.35B
| $1.81M | 0.01% |
33,512
+17,823
| +114% | +$909K |
|
1156
CALL
Children's Place
PLCE
$53.6M
| $1.81M | 0.01% |
201
+135
| +205% | +$16.8K |
|
|
FISV
1157
CALL
Fiserv Inc
FISV
$27.2B
| $1.81M | 0.01% |
246
-38
| -13% | -$2.94K |
|
1158
PUT
Casey's General Stores
CASY
$31.9B
| $1.81M | 0.01% |
141
-101
| -42% | -$12.8K |
|
1159
Freeport-McMoran
FCX
$90B
| $1.81M | 0.01% |
175,263
+8,132
| +5% | +$94.9K |
|
1160
PUT
J.M. Smucker
SJM
$12.6B
| $1.79M | 0.01% |
192
-226
| -54% | -$23.6K |
|
1161
CALL
Liberty Global Class C
LBTYK
$3.25B
| $1.79M | 0.01% |
842
+277
| +49% | +$6.63K |
|
1162
PUT
Suncor Energy
SU
$77.7B
| $1.79M | 0.01% |
641
+404
| +170% | +$13.4K |
|
1163
PUT
Helmerich & Payne
HP
$3.53B
| $1.79M | 0.01% |
373
-74
| -17% | -$4.54K |
|
1164
CALL
Lamb Weston
LW
$6.85B
| $1.79M | 0.01% |
243
+153
| +170% | +$11.7K |
|
1165
PUT
Pentair
PNR
$10.2B
| $1.79M | 0.01% |
473
+296
| +167% | +$12K |
|
1166
Kroger
KR
$34.8B
| $1.78M | 0.01% |
64,942
+57,066
| +725% | +$1.66M |
|
1167
Vanguard Total Stock Market ETF
VTI
$654B
| $1.78M | 0.01% |
13,973
+9,430
| +208% | +$1.3M |
|
1168
CALL
Skyworks Solutions
SWKS
$9.06B
| $1.78M | 0.01% |
266
-157
| -37% | -$12.1K |
|
1169
CALL
Vulcan Materials
VMC
$36.3B
| $1.78M | 0.01% |
180
-24
| -12% | -$2.43K |
|
|
FL
1170
PUT
DELISTED
Foot Locker
FL
| $1.78M | 0.01% |
334
-266
| -44% | -$13.4K |
|
1171
CALL
National Healthcare
NHC
$3.53B
| $1.77M | 0.01% |
226
+215
| +1,955% | +$16.8K |
|
|
WP
1172
DELISTED
Worldpay, Inc.
WP
| $1.77M | 0.01% |
23,184
+7,005
| +43% | +$609K |
|
1173
PUT
Caesarstone
CSTE
$72.3M
| $1.77M | 0.01% |
1,303
+799
| +159% | +$12.4K |
|
1174
PUT
Vodafone
VOD
$34.9B
| $1.77M | 0.01% |
917
-43
| -4% | -$859 |
|
1175
PUT
STMicroelectronics
STM
$46B
| $1.76M | 0.01% |
1,272
-269
| -17% | -$4.03K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.