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 | |
|---|---|---|---|---|---|---|
1201
PUT
Dick's Sporting Goods
DKS
$18.3B
| $1.87M | 0.01% |
531
+125
| +31% | +$4.24K |
|
1202
PUT
Editas Medicine
EDIT
$419M
| $1.87M | 0.01% |
522
-44
| -8% | -$1.56K |
|
1203
CALL
J.M. Smucker
SJM
$12.4B
| $1.87M | 0.01% |
174
-5
| -3% | -$561 |
|
1204
CALL
Targa Resources
TRGP
$61.3B
| $1.87M | 0.01% |
378
-106
| -22% | -$5.04K |
|
1205
PUT
Ashland
ASH
$3.05B
| $1.87M | 0.01% |
239
+29
| +14% | +$2.16K |
|
|
SHLX
1206
CALL
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $1.87M | 0.01% |
842
+631
| +299% | +$14K |
|
1207
PUT
Amdocs
DOX
$5.4B
| $1.87M | 0.01% |
282
+78
| +38% | +$5.25K |
|
|
SINA
1208
DELISTED
Sina Corp
SINA
| $1.86M | 0.01% |
21,956
+7,369
| +51% | +$686K |
|
1209
CALL
Progressive
PGR
$120B
| $1.86M | 0.01% |
314
-98
| -24% | -$6K |
|
1210
PUT
Live Nation Entertainment
LYV
$41B
| $1.85M | 0.01% |
382
+255
| +201% | +$10.9K |
|
|
HTO
1211
CALL
H2O America
HTO
$2.67B
| $1.85M | 0.01% |
+280
| New | +$17K |
|
1212
CALL
Carvana
CVNA
$43.1B
| $1.85M | 0.01% |
2,225
-135
| -6% | -$813 |
|
|
CS
1213
CALL
DELISTED
Credit Suisse Group
CS
| $1.85M | 0.01% |
1,244
-19,020
| -94% | -$307K |
|
1214
Zions Bancorporation
ZION
$10.1B
| $1.85M | 0.01% |
+35,112
| New | +$1.94M |
|
|
FL
1215
CALL
DELISTED
Foot Locker
FL
| $1.85M | 0.01% |
351
-185
| -35% | -$8.95K |
|
1216
CALL
Synopsys
SNPS
$71.5B
| $1.85M | 0.01% |
216
-248
| -53% | -$21.6K |
|
|
ZAYO
1217
CALL
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $1.84M | 0.01% |
506
-20,167
| -98% | -$718K |
|
1218
CALL
Becton Dickinson
BDX
$42.1B
| $1.84M | 0.01% |
79
-46
| -37% | -$10.2K |
|
|
CDK
1219
CALL
DELISTED
CDK Global, Inc.
CDK
| $1.83M | 0.01% |
282
+118
| +72% | +$7.63K |
|
1220
VanEck Junior Gold Miners ETF
GDXJ
$7.05B
| $1.83M | 0.01% |
55,979
+63
| +0.1% | +$2.08K |
|
|
COHR
1221
PUT
DELISTED
Coherent Inc
COHR
| $1.83M | 0.01% |
117
-22
| -16% | -$3.73K |
|
1222
CALL
RenaissanceRe
RNR
$13.3B
| $1.83M | 0.01% |
152
+122
| +407% | +$15.8K |
|
1223
PUT
SAP
SAP
$171B
| $1.83M | 0.01% |
158
-44
| -22% | -$4.97K |
|
1224
PUT
Genesco
GCO
$388M
| $1.83M | 0.01% |
460
+394
| +597% | +$16.8K |
|
|
HA
1225
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $1.83M | 0.01% |
508
-9,262
| -95% | -$357K |
|
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.