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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
PUT
Merck
MRK
$315B
| $6.52M | 0.02% |
963
-1,350
| -58% | -$86K |
|
502
CALL
Rockwell Automation
ROK
$51B
| $6.51M | 0.02% |
347
+132
| +61% | +$23.6K |
|
503
CALL
M&T Bank
MTB
$36.3B
| $6.5M | 0.02% |
395
+246
| +165% | +$42.7K |
|
504
PUT
Campbell Soup
CPB
$6.52B
| $6.5M | 0.02% |
1,774
+368
| +26% | +$15K |
|
505
CALL
EOG Resources
EOG
$76.7B
| $6.49M | 0.02% |
509
-112
| -18% | -$13.6K |
|
506
Weibo
WB
$1.93B
| $6.44M | 0.02% |
88,024
+9,716
| +12% | +$782K |
|
507
CALL
Wayfair
W
$11.1B
| $6.38M | 0.02% |
432
-10
| -2% | -$1.27K |
|
508
CALL
Capital One
COF
$124B
| $6.34M | 0.02% |
668
-180
| -21% | -$17.5K |
|
|
PX
509
CALL
DELISTED
Praxair Inc
PX
| $6.33M | 0.02% |
394
+17
| +5% | +$2.73K |
|
510
PUT
Martin Marietta Materials
MLM
$33.1B
| $6.31M | 0.02% |
347
-20
| -5% | -$4.13K |
|
511
CALL
Macy's
M
$6.4B
| $6.31M | 0.02% |
1,816
-1,216
| -40% | -$45.2K |
|
512
CALL
American International
AIG
$41.5B
| $6.3M | 0.02% |
1,183
-807
| -41% | -$43.3K |
|
513
PUT
Colgate-Palmolive
CL
$73.3B
| $6.29M | 0.02% |
940
-28
| -3% | -$1.86K |
|
514
CALL
American Tower
AMT
$77.4B
| $6.25M | 0.02% |
430
+62
| +17% | +$9.09K |
|
515
PUT
Motorola Solutions
MSI
$67.1B
| $6.25M | 0.02% |
480
+75
| +19% | +$9.28K |
|
516
CALL
General Dynamics
GD
$101B
| $6.24M | 0.02% |
305
-157
| -34% | -$30.7K |
|
|
JOYY
517
PUT
JOYY Inc
JOYY
$3.65B
| $6.22M | 0.02% |
830
+256
| +45% | +$21.5K |
|
518
US Bancorp
USB
$100B
| $6.21M | 0.02% |
117,637
+45,620
| +63% | +$2.42M |
|
519
PUT
MarketAxess Holdings
MKTX
$4.01B
| $6.21M | 0.02% |
348
+200
| +135% | +$38.4K |
|
520
PUT
Boston Beer
SAM
$1.81B
| $6.21M | 0.02% |
216
+193
| +839% | +$57.9K |
|
521
CALL
Viper Energy
VNOM
$8.84B
| $6.21M | 0.02% |
1,474
+1,192
| +423% | +$43.8K |
|
522
PUT
Whirlpool
WHR
$2.41B
| $6.2M | 0.02% |
522
+110
| +27% | +$14.6K |
|
523
PUT
Amplify Junior Silver Miners ETF
SILJ
$3.41B
| $6.2M | 0.02% |
1,547
+1,455
| +1,582% | +$13.9K |
|
524
PUT
GE Aerospace
GE
$354B
| $6.18M | 0.02% |
1,142
+469
| +70% | +$28.9K |
|
525
PUT
Pool Corp
POOL
$7.15B
| $6.17M | 0.02% |
370
+275
| +289% | +$44.5K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.