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 | |
|---|---|---|---|---|---|---|
476
PUT
ASML
ASML
$692B
| $7.09M | 0.02% |
377
+17
| +5% | +$3.41K |
|
|
TYNS
477
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $7.08M | 0.02% |
1,216
+241
| +25% | +$6.97K |
|
|
WBA
478
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $7.07M | 0.02% |
970
-1,200
| -55% | -$81.5K |
|
|
HES
479
CALL
DELISTED
Hess
HES
| $7.01M | 0.02% |
980
-69
| -7% | -$4.55K |
|
480
CALL
Akamai
AKAM
$18.1B
| $6.99M | 0.02% |
956
+545
| +133% | +$40.9K |
|
|
DISH
481
PUT
DELISTED
DISH Network Corp.
DISH
| $6.99M | 0.02% |
1,955
+511
| +35% | +$17.5K |
|
482
CALL
Eaton
ETN
$158B
| $6.98M | 0.02% |
805
+125
| +18% | +$10.2K |
|
483
CALL
Emerson Electric
EMR
$78.2B
| $6.98M | 0.02% |
911
+104
| +13% | +$7.67K |
|
|
TIF
484
CALL
DELISTED
Tiffany & Co.
TIF
| $6.96M | 0.02% |
540
-34
| -6% | -$4.44K |
|
485
PUT
Petrobras
PBR
$122B
| $6.87M | 0.02% |
5,695
-940
| -14% | -$10.4K |
|
486
PUT
Fortinet
FTNT
$114B
| $6.86M | 0.02% |
3,720
+2,890
| +348% | +$44.2K |
|
487
CALL
Dollar Tree
DLTR
$23.5B
| $6.85M | 0.02% |
840
-289
| -26% | -$25.4K |
|
488
CALL
Blackstone
BX
$150B
| $6.8M | 0.02% |
1,787
+1,410
| +374% | +$50.9K |
|
489
Cigna
CI
$75.4B
| $6.8M | 0.02% |
32,674
+13,270
| +68% | +$2.46M |
|
490
CALL
MGM Resorts International
MGM
$11.6B
| $6.77M | 0.02% |
2,427
-801
| -25% | -$23.2K |
|
491
PUT
Boston Scientific
BSX
$63.9B
| $6.74M | 0.02% |
1,751
+1,226
| +234% | +$42.8K |
|
492
Philip Morris
PM
$303B
| $6.63M | 0.02% |
81,274
-28,361
| -26% | -$2.33M |
|
493
PUT
Automatic Data Processing
ADP
$97.2B
| $6.61M | 0.02% |
439
-255
| -37% | -$36.1K |
|
|
CMA
494
PUT
DELISTED
Comerica
CMA
| $6.6M | 0.02% |
732
+431
| +143% | +$41.1K |
|
495
CALL
Cheniere Energy
LNG
$56B
| $6.59M | 0.02% |
948
+377
| +66% | +$24.3K |
|
496
CALL
Progressive
PGR
$119B
| $6.58M | 0.02% |
927
+613
| +195% | +$39.4K |
|
497
PUT
Seagate
STX
$205B
| $6.57M | 0.02% |
1,388
+537
| +63% | +$28.7K |
|
498
CALL
D.R. Horton
DHI
$40.4B
| $6.56M | 0.02% |
1,556
+1,083
| +229% | +$46.9K |
|
499
CALL
Dell
DELL
$285B
| $6.55M | 0.02% |
2,405
-22
| -0.9% | -$587 |
|
|
500
PUT
Cheniere Energy
LNG
$56B
| $6.54M | 0.02% |
942
-69
| -7% | -$4.45K |
|
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.