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 | |
|---|---|---|---|---|---|---|
|
WUBA
1351
CALL
DELISTED
58.com Inc
WUBA
| $1.77M | 0.01% |
240
+133
| +124% | +$9.2K |
|
1352
Idexx Laboratories
IDXX
$42.5B
| $1.76M | 0.01% |
7,064
+6,202
| +719% | +$1.51M |
|
1353
PUT
Standex International
SXI
$3.74B
| $1.76M | 0.01% |
169
+1
| +0.6% | +$106 |
|
1354
PUT
Wolfspeed
WOLF
$1.35B
| $1.76M | 0.01% |
464
+32
| +7% | +$1.45K |
|
1355
CALL
BHP
BHP
$212B
| $1.75M | 0.01% |
395
-380
| -49% | -$16.5K |
|
1356
CALL
iShares Convertible Bond ETF
ICVT
$7.37B
| $1.75M | 0.01% |
513
+13
| +3% | +$766 |
|
|
DATA
1357
PUT
DELISTED
Tableau Software, Inc.
DATA
| $1.75M | 0.01% |
157
+115
| +274% | +$12.4K |
|
1358
CALL
Newmont
NEM
$101B
| $1.75M | 0.01% |
580
+80
| +16% | +$2.71K |
|
|
PVTL
1359
CALL
DELISTED
Pivotal Software, Inc.
PVTL
| $1.75M | 0.01% |
893
+819
| +1,107% | +$20K |
|
1360
PUT
CarMax
KMX
$8.29B
| $1.75M | 0.01% |
234
-251
| -52% | -$19.1K |
|
|
BERY
1361
DELISTED
Berry Global Group, Inc.
BERY
| $1.75M | 0.01% |
39,299
+9,769
| +33% | +$429K |
|
1362
CALL
Qorvo
QRVO
$7.65B
| $1.75M | 0.01% |
227
-56
| -20% | -$4.49K |
|
1363
CALL
Whirlpool
WHR
$2.31B
| $1.75M | 0.01% |
147
-260
| -64% | -$34.5K |
|
1364
CALL
Brinker International
EAT
$7.93B
| $1.74M | 0.01% |
373
+336
| +908% | +$15.7K |
|
1365
PUT
Aecom
ACM
$8.69B
| $1.74M | 0.01% |
532
+530
| +26,500% | +$17.5K |
|
1366
CALL
Match Group
MTCH
$8.72B
| $1.74M | 0.01% |
300
+172
| +134% | +$8.06K |
|
|
QVCGA
1367
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $1.73M | 0.01% |
16
+6
| +60% | +$6.3K |
|
1368
CALL
BioMarin Pharmaceuticals
BMRN
$11.4B
| $1.73M | 0.01% |
178
-165
| -48% | -$16.5K |
|
1369
CALL
JB Hunt Transport Services
JBHT
$27.2B
| $1.72M | 0.01% |
145
+102
| +237% | +$12.4K |
|
1370
CALL
Dave & Buster's
PLAY
$339M
| $1.72M | 0.01% |
260
+166
| +177% | +$8.99K |
|
1371
CALL
Cintas
CTAS
$81.3B
| $1.72M | 0.01% |
348
-64
| -16% | -$3.31K |
|
1372
PUT
Carvana
CVNA
$43.1B
| $1.72M | 0.01% |
1,455
+30
| +2% | +$321 |
|
1373
PUT
Yum China
YUMC
$14.8B
| $1.72M | 0.01% |
489
-98
| -17% | -$3.49K |
|
|
TSRO
1374
PUT
DELISTED
TESARO, Inc.
TSRO
| $1.72M | 0.01% |
440
-406
| -48% | -$14.3K |
|
1375
PUT
Cencora
COR
$59.4B
| $1.72M | 0.01% |
186
-17
| -8% | -$1.47K |
|
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.