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 | |
|---|---|---|---|---|---|---|
1226
PUT
CDW
CDW
$16.9B
| $1.82M | 0.01% |
+226
| New | +$17.5K |
|
|
CYBR
1227
PUT
DELISTED
CyberArk
CYBR
| $1.82M | 0.01% |
290
-331
| -53% | -$19.3K |
|
1228
PUT
AvalonBay Communities
AVB
$27.4B
| $1.82M | 0.01% |
106
-22
| -17% | -$3.64K |
|
1229
PUT
TE Connectivity
TEL
$58.2B
| $1.82M | 0.01% |
202
+23
| +13% | +$2.2K |
|
1230
CALL
Exelixis
EXEL
$14B
| $1.82M | 0.01% |
845
-42,353
| -98% | -$876K |
|
|
PPLI
1231
People Inc
PPLI
$3.13B
| $1.81M | 0.01% |
+66,597
| New | +$1.82M |
|
|
HIBB
1232
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $1.81M | 0.01% |
792
+365
| +85% | +$9.51K |
|
1233
PUT
Perrigo
PRGO
$1.4B
| $1.81M | 0.01% |
248
+149
| +151% | +$11.5K |
|
1234
PUT
Digital Realty Trust
DLR
$75.3B
| $1.81M | 0.01% |
162
-161
| -50% | -$17.1K |
|
1235
Carter's
CRI
$1.39B
| $1.8M | 0.01% |
16,640
+6,693
| +67% | +$720K |
|
1236
PUT
OneSpan
OSPN
$552M
| $1.8M | 0.01% |
+918
| New | +$16.5K |
|
1237
CALL
Wendy's
WEN
$1.37B
| $1.8M | 0.01% |
1,048
-55
| -5% | -$936 |
|
1238
eBay
EBAY
$48B
| $1.8M | 0.01% |
49,601
-11,519
| -19% | -$448K |
|
1239
PUT
Dycom Industries
DY
$13.2B
| $1.79M | 0.01% |
190
+34
| +22% | +$3.48K |
|
1240
PUT
Wolfspeed
WOLF
$1.24B
| $1.79M | 0.01% |
432
+12
| +3% | +$525 |
|
1241
PUT
Insmed
INSM
$23.2B
| $1.79M | 0.01% |
+758
| New | +$19.5K |
|
1242
PUT
Teck Resources
TECK
$29.6B
| $1.79M | 0.01% |
704
-1,407
| -67% | -$37.7K |
|
|
COL
1243
PUT
DELISTED
Rockwell Collins
COL
| $1.79M | 0.01% |
133
-43
| -24% | -$5.82K |
|
1244
PUT
C.H. Robinson
CHRW
$22.5B
| $1.79M | 0.01% |
214
+15
| +8% | +$1.34K |
|
1245
Charter Communications
CHTR
$14.9B
| $1.79M | 0.01% |
+6,092
| New | +$1.75M |
|
1246
iShares MSCI EAFE ETF
EFA
$76.4B
| $1.78M | 0.01% |
+26,656
| New | +$1.87M |
|
1247
Southwest Airlines
LUV
$21.8B
| $1.78M | 0.01% |
+35,076
| New | +$1.85M |
|
1248
PUT
Fair Isaac
FICO
$28.7B
| $1.78M | 0.01% |
92
+16
| +21% | +$2.9K |
|
|
EMBJ
1249
PUT
Embraer S.A. ADS
EMBJ
$11.7B
| $1.77M | 0.01% |
713
+368
| +107% | +$9.36K |
|
1250
Fomento Económico Mexicano
FMX
$43.3B
| $1.77M | 0.01% |
20,220
-5,116
| -20% | -$452K |
|
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.