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 | |
|---|---|---|---|---|---|---|
1376
PUT
Delek US
DK
$3.97B
| $1.71M | 0.01% |
404
-1,466
| -78% | -$72.3K |
|
1377
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$34.7B
| $1.71M | 0.01% |
+14,910
| New | +$1.72M |
|
1378
PUT
Universal Health Services
UHS
$9.16B
| $1.71M | 0.01% |
134
+19
| +17% | +$2.33K |
|
|
CZR
1379
DELISTED
Caesars Entertainment Corporation
CZR
| $1.71M | 0.01% |
166,986
-43,645
| -21% | -$459K |
|
1380
PUT
Toll Brothers
TOL
$13.7B
| $1.7M | 0.01% |
515
+369
| +253% | +$13.4K |
|
1381
PUT
Factset
FDS
$8.68B
| $1.7M | 0.01% |
76
-201
| -73% | -$43.6K |
|
1382
PUT
S&P Global
SPGI
$124B
| $1.7M | 0.01% |
87
-74
| -46% | -$15.3K |
|
1383
CALL
Alcoa
AA
$11.9B
| $1.7M | 0.01% |
420
+93
| +28% | +$4.04K |
|
|
ONCE
1384
PUT
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $1.7M | 0.01% |
311
+296
| +1,973% | +$20.2K |
|
1385
WisdomTree Japan Hedged Equity Fund
DXJ
$7.17B
| $1.69M | 0.01% |
29,213
+18,319
| +168% | +$1.01M |
|
1386
CALL
Ford
F
$56.4B
| $1.69M | 0.01% |
1,828
+948
| +108% | +$9.48K |
|
1387
CALL
Genesco
GCO
$388M
| $1.69M | 0.01% |
359
-39
| -10% | -$1.7K |
|
1388
CALL
Archer Daniels Midland
ADM
$41.6B
| $1.69M | 0.01% |
336
-106
| -24% | -$5.2K |
|
1389
PUT
AstraZeneca
AZN
$261B
| $1.69M | 0.01% |
214
+132
| +161% | +$9.98K |
|
1390
Shopify
SHOP
$145B
| $1.69M | 0.01% |
+102,680
| New | +$1.56M |
|
|
POLY
1391
PUT
DELISTED
Plantronics, Inc.
POLY
| $1.69M | 0.01% |
280
+278
| +13,900% | +$19K |
|
|
KSU
1392
CALL
DELISTED
Kansas City Southern
KSU
| $1.69M | 0.01% |
149
+1
| +0.7% | +$114 |
|
|
AMED
1393
CALL
DELISTED
Amedisys
AMED
| $1.69M | 0.01% |
135
+134
| +13,400% | +$14.8K |
|
1394
PUT
Owens Corning
OC
$11.2B
| $1.68M | 0.01% |
310
+188
| +154% | +$11.3K |
|
1395
Signet Jewelers
SIG
$3.48B
| $1.68M | 0.01% |
+25,521
| New | +$1.57M |
|
|
NAV
1396
CALL
DELISTED
Navistar International
NAV
| $1.68M | 0.01% |
437
+41
| +10% | +$1.71K |
|
1397
CALL
Dick's Sporting Goods
DKS
$18.3B
| $1.68M | 0.01% |
474
-637
| -57% | -$22.8K |
|
1398
PUT
Webster Financial
WBS
$12.2B
| $1.68M | 0.01% |
285
+249
| +692% | +$16.2K |
|
1399
PUT
HealthEquity
HQY
$7.89B
| $1.67M | 0.01% |
177
+105
| +146% | +$9.04K |
|
1400
PUT
SBA Communications
SBAC
$18.5B
| $1.67M | 0.01% |
104
-29
| -22% | -$4.62K |
|
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.