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 | |
|---|---|---|---|---|---|---|
1276
PUT
AutoNation
AN
$6.86B
| $1.94M | 0.01% |
467
+463
| +11,575% | +$21.4K |
|
|
ULTI
1277
DELISTED
Ultimate Software Group Inc
ULTI
| $1.94M | 0.01% |
6,022
+1,560
| +35% | +$462K |
|
|
CDK
1278
DELISTED
CDK Global, Inc.
CDK
| $1.93M | 0.01% |
+30,928
| New | +$1.96M |
|
1279
PUT
Hilton Worldwide
HLT
$72.9B
| $1.93M | 0.01% |
239
-361
| -60% | -$28.4K |
|
1280
PUT
Paycom
PAYC
$6.47B
| $1.93M | 0.01% |
124
-142
| -53% | -$19.1K |
|
1281
PUT
Weyerhaeuser
WY
$17B
| $1.93M | 0.01% |
597
+1
| +0.2% | +$35 |
|
1282
Campbell Soup
CPB
$6.38B
| $1.92M | 0.01% |
52,485
+15,147
| +41% | +$617K |
|
1283
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $1.92M | 0.01% |
493
+64
| +15% | +$2.17K |
|
1284
PUT
iShares MSCI Global Gold Miners ETF
RING
$2.31B
| $1.92M | 0.01% |
382
-273
| -42% | -$4.25K |
|
1285
PUT
HDFC Bank
HDB
$119B
| $1.92M | 0.01% |
816
-16
| -2% | -$408 |
|
|
HES
1286
DELISTED
Hess
HES
| $1.92M | 0.01% |
+26,816
| New | +$1.77M |
|
1287
CALL
Illinois Tool Works
ITW
$79.7B
| $1.92M | 0.01% |
136
-93
| -41% | -$13.1K |
|
|
SRCL
1288
PUT
DELISTED
Stericycle Inc
SRCL
| $1.92M | 0.01% |
327
+173
| +112% | +$11K |
|
1289
PUT
Grand Canyon Education
LOPE
$3.69B
| $1.91M | 0.01% |
169
-23
| -12% | -$2.68K |
|
|
CLR
1290
CALL
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $1.91M | 0.01% |
279
+18
| +7% | +$1.14K |
|
1291
CALL
GSK
GSK
$102B
| $1.9M | 0.01% |
379
-23
| -6% | -$1.17K |
|
1292
Newell Brands
NWL
$2.14B
| $1.9M | 0.01% |
93,681
+82,825
| +763% | +$1.95M |
|
1293
PUT
Deutsche Bank
DB
$65.3B
| $1.9M | 0.01% |
1,673
-130
| -7% | -$1.53K |
|
1294
CALL
Itaú Unibanco
ITUB
$92B
| $1.9M | 0.01% |
3,564
-1,097
| -24% | -$5.89K |
|
1295
CALL
Zillow
Z
$6.77B
| $1.9M | 0.01% |
429
+167
| +64% | +$8.71K |
|
|
CRON
1296
PUT
Cronos Group
CRON
$1.02B
| $1.9M | 0.01% |
1,705
+1,609
| +1,676% | +$13.7K |
|
1297
PUT
Canadian Solar
CSIQ
$997M
| $1.9M | 0.01% |
1,307
+407
| +45% | +$5.61K |
|
1298
PUT
Zions Bancorporation
ZION
$10.1B
| $1.89M | 0.01% |
377
-186
| -33% | -$9.82K |
|
1299
CALL
Burlington
BURL
$21.4B
| $1.89M | 0.01% |
116
+40
| +53% | +$6.38K |
|
1300
iQIYI
IQ
$1.17B
| $1.89M | 0.01% |
69,774
+27,235
| +64% | +$811K |
|
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.