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 | |
|---|---|---|---|---|---|---|
1301
CALL
3D Systems Corp
DDD
$423M
| $1.67M | 0.01% |
1,206
+104
| +9% | +$1.29K |
|
1302
CALL
PENN Entertainment
PENN
$2.79B
| $1.66M | 0.01% |
495
+410
| +482% | +$12.8K |
|
1303
PUT
Rockwell Automation
ROK
$51.7B
| $1.66M | 0.01% |
100
+61
| +156% | +$10.6K |
|
1304
CALL
Copart
CPRT
$25.9B
| $1.66M | 0.01% |
1,172
+1,136
| +3,156% | +$15.4K |
|
1305
CALL
Avis
CAR
$5.76B
| $1.65M | 0.01% |
509
-262
| -34% | -$11.4K |
|
1306
Expedia Group
EXPE
$31.8B
| $1.65M | 0.01% |
13,751
-64,965
| -83% | -$7.5M |
|
1307
CALL
Martin Marietta Materials
MLM
$33.6B
| $1.65M | 0.01% |
74
-38
| -34% | -$8.11K |
|
1308
PUT
CVR Energy
CVI
$3.37B
| $1.65M | 0.01% |
446
+372
| +503% | +$14K |
|
1309
PUT
Hershey
HSY
$35.6B
| $1.65M | 0.01% |
177
+99
| +127% | +$9.23K |
|
|
ULTI
1310
PUT
DELISTED
Ultimate Software Group Inc
ULTI
| $1.65M | 0.01% |
64
+10
| +19% | +$2.57K |
|
1311
PUT
Vail Resorts
MTN
$5.28B
| $1.65M | 0.01% |
+60
| New | +$14.7K |
|
1312
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$715M
| $1.64M | 0.01% |
429
+278
| +184% | +$9.7K |
|
|
SCG
1313
CALL
DELISTED
Scana
SCG
| $1.64M | 0.01% |
427
+24
| +6% | +$874 |
|
1314
CALL
DexCom
DXCM
$27.5B
| $1.64M | 0.01% |
692
-88
| -11% | -$1.87K |
|
1315
CALL
Sinclair Inc
SBGI
$984M
| $1.64M | 0.01% |
509
+240
| +89% | +$7.18K |
|
|
GOOS
1316
Canada Goose Holdings
GOOS
$880M
| $1.63M | 0.01% |
+27,667
| New | +$1.17M |
|
|
FITB
1317
CALL
Fifth Third Bancorp
FITB
$52.2B
| $1.62M | 0.01% |
566
+71
| +14% | +$2.25K |
|
1318
CALL
Exelon
EXC
$48.6B
| $1.62M | 0.01% |
534
+289
| +118% | +$8.27K |
|
1319
Cardinal Health
CAH
$53.5B
| $1.62M | 0.01% |
33,205
+11,119
| +50% | +$630K |
|
1320
PUT
Under Armour Class C
UA
$2.89B
| $1.62M | 0.01% |
748
-884
| -54% | -$15.7K |
|
|
BMS
1321
DELISTED
Bemis
BMS
| $1.62M | 0.01% |
38,380
+34,347
| +852% | +$1.48M |
|
1322
Vulcan Materials
VMC
$36.3B
| $1.62M | 0.01% |
12,537
-4,081
| -25% | -$503K |
|
|
BERY
1323
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $1.62M | 0.01% |
383
+323
| +538% | +$15K |
|
1324
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $1.62M | 0.01% |
187
+44
| +31% | +$3.86K |
|
1325
PUT
Hasbro
HAS
$12.5B
| $1.61M | 0.01% |
175
+96
| +122% | +$8.43K |
|
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.