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 | |
|---|---|---|---|---|---|---|
|
CZR
1126
CALL
DELISTED
Caesars Entertainment Corporation
CZR
| $1.91M | 0.01% |
2,817
+763
| +37% | +$6.43K |
|
1127
CALL
Cheniere Energy
LNG
$56.5B
| $1.91M | 0.01% |
322
-626
| -66% | -$38.5K |
|
1128
PUT
Atlassian
TEAM
$21.9B
| $1.9M | 0.01% |
214
-172
| -45% | -$13.6K |
|
1129
PUT
Pinnacle West Capital
PNW
$12.9B
| $1.9M | 0.01% |
223
+221
| +11,050% | +$19K |
|
1130
PUT
GoDaddy
GDDY
$12.3B
| $1.9M | 0.01% |
289
+249
| +623% | +$17K |
|
1131
PUT
ResMed
RMD
$28.4B
| $1.89M | 0.01% |
166
+130
| +361% | +$13.9K |
|
1132
CALL
Ambarella
AMBA
$2.94B
| $1.89M | 0.01% |
539
-98
| -15% | -$3.47K |
|
1133
PUT
Ally Financial
ALLY
$13B
| $1.88M | 0.01% |
830
+398
| +92% | +$9.95K |
|
1134
CALL
United States Oil Fund
USO
$2.44B
| $1.88M | 0.01% |
243
+63
| +35% | +$6.34K |
|
1135
PUT
Huntington Ingalls Industries
HII
$11.4B
| $1.86M | 0.01% |
98
-86
| -47% | -$18.7K |
|
1136
Yum! Brands
YUM
$40.8B
| $1.86M | 0.01% |
20,292
+7,248
| +56% | +$648K |
|
|
PTR
1137
PUT
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $1.86M | 0.01% |
303
+283
| +1,415% | +$20.3K |
|
1138
PUT
Credicorp
BAP
$30.9B
| $1.86M | 0.01% |
84
+43
| +105% | +$9.51K |
|
1139
CALL
Labcorp
LH
$24.3B
| $1.86M | 0.01% |
171
+6
| +4% | +$804 |
|
1140
PUT
Valmont Industries
VMI
$9.48B
| $1.85M | 0.01% |
167
-162
| -49% | -$20.2K |
|
|
MRSH
1141
PUT
Marsh
MRSH
$85.8B
| $1.85M | 0.01% |
232
+121
| +109% | +$10.1K |
|
1142
PUT
HealthEquity
HQY
$7.96B
| $1.85M | 0.01% |
310
+133
| +75% | +$10.7K |
|
1143
CALL
Edgewell Personal Care
EPC
$1.27B
| $1.85M | 0.01% |
495
+285
| +136% | +$12.4K |
|
|
SFLY
1144
CALL
DELISTED
Shutterfly, Inc.
SFLY
| $1.84M | 0.01% |
458
+397
| +651% | +$20.8K |
|
1145
PUT
Teradyne
TER
$54.9B
| $1.84M | 0.01% |
587
+442
| +305% | +$15K |
|
|
BPL
1146
PUT
DELISTED
Buckeye Partners, L.P.
BPL
| $1.84M | 0.01% |
635
+520
| +452% | +$16.6K |
|
1147
CALL
Edison International
EIX
$30.7B
| $1.84M | 0.01% |
324
+136
| +72% | +$8.46K |
|
|
PTLA
1148
CALL
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $1.84M | 0.01% |
941
+520
| +124% | +$10.7K |
|
|
CTRA
1149
DELISTED
Coterra Energy
CTRA
| $1.83M | 0.01% |
82,027
+21,117
| +35% | +$510K |
|
|
HOLX
1150
CALL
DELISTED
Hologic
HOLX
| $1.83M | 0.01% |
446
+380
| +576% | +$15.6K |
|
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.