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 | |
|---|---|---|---|---|---|---|
1476
Teva Pharmaceuticals
TEVA
$36B
| $1.53M | ﹤0.01% |
+71,021
| New | +$1.65M |
|
1477
Dollar General
DG
$26.1B
| $1.53M | ﹤0.01% |
+13,965
| New | +$1.45M |
|
1478
CALL
ICU Medical
ICUI
$3.97B
| $1.53M | ﹤0.01% |
54
+47
| +671% | +$13.8K |
|
1479
CALL
Ingredion
INGR
$6.36B
| $1.52M | ﹤0.01% |
145
-208
| -59% | -$21.2K |
|
1480
PUT
Air Products & Chemicals
APD
$66B
| $1.52M | ﹤0.01% |
91
+26
| +40% | +$4.23K |
|
1481
PUT
Ross Stores
ROST
$76.4B
| $1.52M | ﹤0.01% |
153
+26
| +20% | +$2.39K |
|
|
MNDT
1482
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.52M | ﹤0.01% |
892
-418
| -32% | -$6.69K |
|
1483
PUT
CoStar Group
CSGP
$11.3B
| $1.51M | ﹤0.01% |
360
-290
| -45% | -$12.4K |
|
1484
PUT
Interactive Brokers
IBKR
$40.9B
| $1.51M | ﹤0.01% |
1,096
-812
| -43% | -$12.3K |
|
1485
Thor Industries
THO
$4B
| $1.51M | ﹤0.01% |
18,108
+14,498
| +402% | +$1.39M |
|
1486
PUT
IPG Photonics
IPGP
$3.96B
| $1.51M | ﹤0.01% |
97
-65
| -40% | -$12.1K |
|
1487
CALL
Landstar System
LSTR
$6.84B
| $1.51M | ﹤0.01% |
124
+119
| +2,380% | +$13.8K |
|
|
ARRY
1488
CALL
DELISTED
Array Biopharma Inc
ARRY
| $1.51M | ﹤0.01% |
993
+325
| +49% | +$4.98K |
|
1489
PUT
Citizens Financial Group
CFG
$30.4B
| $1.51M | ﹤0.01% |
391
-128
| -25% | -$5.16K |
|
|
BECN
1490
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $1.5M | ﹤0.01% |
416
+335
| +414% | +$13.3K |
|
1491
PUT
American Eagle Outfitters
AEO
$2.88B
| $1.5M | ﹤0.01% |
606
-78
| -11% | -$1.98K |
|
1492
CALL
Broadridge
BR
$17.1B
| $1.5M | ﹤0.01% |
114
-49
| -30% | -$6.22K |
|
1493
CALL
Essex Property Trust
ESS
$18.8B
| $1.5M | ﹤0.01% |
61
+56
| +1,120% | +$13.5K |
|
1494
iShares Silver Trust
SLV
$28.3B
| $1.5M | ﹤0.01% |
109,532
-26,063
| -19% | -$367K |
|
1495
CALL
Crown Castle
CCI
$33.1B
| $1.5M | ﹤0.01% |
135
-106
| -44% | -$11.8K |
|
1496
NetEase
NTES
$76.8B
| $1.5M | ﹤0.01% |
+32,885
| New | +$1.51M |
|
|
INXN
1497
CALL
DELISTED
Interxion Holding N.V.
INXN
| $1.5M | ﹤0.01% |
223
-3
| -1% | -$195 |
|
|
SAGE
1498
PUT
DELISTED
Sage Therapeutics
SAGE
| $1.5M | ﹤0.01% |
106
-30
| -22% | -$4.63K |
|
1499
CALL
Vale
VALE
$63.1B
| $1.5M | ﹤0.01% |
1,009
+719
| +248% | +$9.71K |
|
|
BNY
1500
CALL
Bank of New York Mellon
BNY
$108B
| $1.49M | ﹤0.01% |
293
-356
| -55% | -$18.7K |
|
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.