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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
JNPR
1126
PUT
DELISTED
Juniper Networks
JNPR
| $2.03M | 0.01% |
742
-608
| -45% | -$15.8K |
|
|
ZAYO
1127
PUT
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $2.03M | 0.01% |
557
+525
| +1,641% | +$18.7K |
|
1128
PUT
Ally Financial
ALLY
$13.4B
| $2.03M | 0.01% |
773
+484
| +167% | +$12.9K |
|
1129
CVS Health
CVS
$136B
| $2.03M | 0.01% |
31,554
-48,348
| -61% | -$3.19M |
|
1130
PUT
Box
BOX
$3.92B
| $2.03M | 0.01% |
812
+34
| +4% | +$843 |
|
|
CTRA
1131
CALL
DELISTED
Coterra Energy
CTRA
| $2.03M | 0.01% |
852
+376
| +79% | +$8.78K |
|
1132
CALL
Archer Daniels Midland
ADM
$41.6B
| $2.02M | 0.01% |
442
-483
| -52% | -$21.7K |
|
1133
PUT
Vornado Realty Trust
VNO
$7.34B
| $2.02M | 0.01% |
274
+57
| +26% | +$3.94K |
|
|
GRUB
1134
PUT
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $2.02M | 0.01% |
97
+21
| +28% | +$4.35K |
|
1135
CALL
GSK
GSK
$102B
| $2.02M | 0.01% |
402
-1,348
| -77% | -$67.9K |
|
1136
CALL
Wabtec
WAB
$50.3B
| $2.02M | 0.01% |
205
+200
| +4,000% | +$18.6K |
|
1137
CALL
GoDaddy
GDDY
$11.6B
| $2.02M | 0.01% |
286
-11,997
| -98% | -$816K |
|
1138
PUT
Citizens Financial Group
CFG
$30.3B
| $2.02M | 0.01% |
519
+267
| +106% | +$11.1K |
|
1139
Domino's
DPZ
$10.7B
| $2.02M | 0.01% |
+7,145
| New | +$1.81M |
|
|
MNDT
1140
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $2.02M | 0.01% |
1,310
+120
| +10% | +$2.09K |
|
1141
PUT
Credit Acceptance
CACC
$6.2B
| $2.01M | 0.01% |
57
+37
| +185% | +$12.7K |
|
|
CTXS
1142
CALL
DELISTED
Citrix Systems Inc
CTXS
| $2.01M | 0.01% |
192
-126
| -40% | -$13K |
|
|
LOXO
1143
CALL
DELISTED
Loxo Oncology, Inc
LOXO
| $2.01M | 0.01% |
116
+45
| +63% | +$6.76K |
|
1144
PUT
Ionis Pharmaceuticals
IONS
$9.23B
| $2.01M | 0.01% |
482
+165
| +52% | +$7.31K |
|
1145
Zoetis
ZTS
$31.3B
| $2.01M | 0.01% |
+23,576
| New | +$1.99M |
|
1146
Aflac
AFL
$63.3B
| $2.01M | 0.01% |
46,642
+37,049
| +386% | +$1.66M |
|
|
SPLK
1147
DELISTED
Splunk Inc
SPLK
| $2.01M | 0.01% |
+20,249
| New | +$2.2M |
|
|
ZUO
1148
PUT
DELISTED
Zuora, Inc.
ZUO
| $2M | 0.01% |
+737
| New | +$17.4K |
|
1149
Bread Financial
BFH
$4.19B
| $2M | 0.01% |
10,760
+10,380
| +2,732% | +$1.77M |
|
1150
PUT
Intuit
INTU
$77B
| $2M | 0.01% |
98
+46
| +88% | +$8.82K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.