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 | |
|---|---|---|---|---|---|---|
1376
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $1.52M | 0.01% |
150
-83
| -36% | -$8.46K |
|
|
CTRA
1377
PUT
DELISTED
Coterra Energy
CTRA
| $1.52M | 0.01% |
640
+376
| +142% | +$8.78K |
|
1378
PUT
ING
ING
$93.8B
| $1.52M | 0.01% |
1,064
+1,042
| +4,736% | +$16.6K |
|
1379
Rockwell Automation
ROK
$51.4B
| $1.51M | 0.01% |
+9,114
| New | +$1.58M |
|
1380
CALL
Globe Life
GL
$13.5B
| $1.51M | 0.01% |
+186
| New | +$15.8K |
|
1381
CALL
Casey's General Stores
CASY
$31.9B
| $1.51M | 0.01% |
144
-5,366
| -97% | -$543K |
|
1382
Campbell Soup
CPB
$6.51B
| $1.51M | 0.01% |
37,338
-1,825
| -5% | -$71K |
|
1383
PUT
Tapestry
TPR
$28.8B
| $1.51M | 0.01% |
324
+1
| +0.3% | +$48 |
|
1384
PUT
Churchill Downs
CHDN
$6.03B
| $1.51M | 0.01% |
+306
| New | +$14.3K |
|
|
SKX
1385
DELISTED
Skechers
SKX
| $1.51M | 0.01% |
+50,292
| New | +$1.61M |
|
1386
CALL
Clorox
CLX
$11.6B
| $1.5M | 0.01% |
111
-73
| -40% | -$9.01K |
|
1387
PUT
Coty
COTY
$2.33B
| $1.5M | 0.01% |
1,065
-262
| -20% | -$4.04K |
|
1388
Mercado Libre
MELI
$91.3B
| $1.5M | 0.01% |
5,023
+4,523
| +905% | +$1.43M |
|
|
MIC
1389
CALL
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $1.5M | 0.01% |
355
-108
| -23% | -$4.24K |
|
1390
Ashland
ASH
$3.04B
| $1.5M | 0.01% |
19,140
+3,818
| +25% | +$284K |
|
1391
PUT
Liberty Media Series A
FWONA
$22.3B
| $1.5M | 0.01% |
421
+399
| +1,814% | +$11.5K |
|
1392
CALL
Chemours
CC
$2.59B
| $1.49M | 0.01% |
336
+127
| +61% | +$6.32K |
|
1393
PUT
Centene
CNC
$31.3B
| $1.49M | 0.01% |
242
+156
| +181% | +$9K |
|
1394
PUT
Ciena
CIEN
$55.3B
| $1.49M | 0.01% |
562
-886
| -61% | -$22.5K |
|
|
CEO
1395
PUT
DELISTED
CNOOC Limited
CEO
| $1.49M | 0.01% |
87
+74
| +569% | +$12.3K |
|
|
BZUN
1396
CALL
Baozun
BZUN
$144M
| $1.49M | 0.01% |
272
-482
| -64% | -$25.5K |
|
|
TRHC
1397
CALL
DELISTED
Tabula Rasa HealthCare, Inc. Common Stock
TRHC
| $1.49M | 0.01% |
+233
| New | +$11.4K |
|
|
IRBT
1398
CALL
DELISTED
iRobot
IRBT
| $1.49M | 0.01% |
196
-1,326
| -87% | -$88.1K |
|
1399
PUT
InterDigital
IDCC
$6.68B
| $1.48M | 0.01% |
183
+95
| +108% | +$7.56K |
|
|
BPMC
1400
PUT
DELISTED
Blueprint Medicines
BPMC
| $1.48M | 0.01% |
233
+166
| +248% | +$13.2K |
|
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.