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 | |
|---|---|---|---|---|---|---|
1451
PUT
Abercrombie & Fitch
ANF
$4.17B
| $1.57M | 0.01% |
744
+181
| +32% | +$4.39K |
|
|
WRK
1452
DELISTED
WestRock Company
WRK
| $1.57M | 0.01% |
29,344
+22,863
| +353% | +$1.28M |
|
1453
PUT
Baker Hughes
BKR
$57.4B
| $1.57M | 0.01% |
463
+104
| +29% | +$3.44K |
|
|
TRHC
1454
PUT
DELISTED
Tabula Rasa HealthCare, Inc. Common Stock
TRHC
| $1.57M | 0.01% |
193
+191
| +9,550% | +$14K |
|
|
NLSN
1455
DELISTED
Nielsen Holdings plc
NLSN
| $1.56M | 0.01% |
56,602
+51,297
| +967% | +$1.38M |
|
1456
PUT
Lumentum
LITE
$60B
| $1.56M | 0.01% |
261
+74
| +40% | +$4.43K |
|
1457
PUT
Coty
COTY
$2.34B
| $1.56M | 0.01% |
1,243
+178
| +17% | +$2.3K |
|
1458
PUT
NOV
NOV
$7.47B
| $1.56M | 0.01% |
362
-77
| -18% | -$3.44K |
|
|
IMMU
1459
CALL
DELISTED
Immunomedics Inc
IMMU
| $1.56M | 0.01% |
748
+174
| +30% | +$4.12K |
|
1460
PUT
Helen of Troy
HELE
$652M
| $1.56M | 0.01% |
119
+64
| +116% | +$7.54K |
|
1461
PUT
Perrigo
PRGO
$1.41B
| $1.56M | 0.01% |
220
-28
| -11% | -$2.1K |
|
|
CVGW
1462
CALL
DELISTED
Calavo Growers
CVGW
| $1.55M | 0.01% |
161
+133
| +475% | +$13.1K |
|
1463
CALL
AMC Global Media
AMCX
$441M
| $1.55M | 0.01% |
234
+8
| +4% | +$499 |
|
1464
PUT
Sony
SONY
$124B
| $1.55M | 0.01% |
1,280
+815
| +175% | +$8.97K |
|
1465
Vanda Pharmaceuticals
VNDA
$313M
| $1.55M | 0.01% |
67,586
+65,389
| +2,976% | +$1.33M |
|
|
SONC
1466
CALL
DELISTED
Sonic Corp
SONC
| $1.55M | 0.01% |
357
+343
| +2,450% | +$12.3K |
|
1467
CALL
TC Energy
TRP
$73.3B
| $1.54M | 0.01% |
382
+365
| +2,147% | +$15.8K |
|
1468
CALL
Cboe Global Markets
CBOE
$29.6B
| $1.54M | 0.01% |
161
-304
| -65% | -$30.7K |
|
1469
CALL
Ciena
CIEN
$55.3B
| $1.54M | 0.01% |
494
-113
| -19% | -$3.17K |
|
1470
Alcoa
AA
$11.9B
| $1.54M | 0.01% |
38,172
+1,299
| +4% | +$56.5K |
|
1471
Gen Digital
GEN
$15.6B
| $1.54M | 0.01% |
72,465
+48,387
| +201% | +$986K |
|
1472
CALL
Nektar Therapeutics
NKTR
$2.41B
| $1.54M | 0.01% |
17
-29
| -63% | -$24.8K |
|
1473
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$30.1M
| $1.54M | ﹤0.01% |
+4
| New | +$1.35M |
|
|
EMBJ
1474
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $1.53M | ﹤0.01% |
782
+69
| +10% | +$1.4K |
|
1475
PUT
Etsy
ETSY
$7.68B
| $1.53M | ﹤0.01% |
298
+26
| +10% | +$1.2K |
|
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.