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 | |
|---|---|---|---|---|---|---|
1401
CALL
YPF
YPF
$20.4B
| $1.67M | 0.01% |
1,081
+281
| +35% | +$4.38K |
|
1402
TechnipFMC
FTI
$30.3B
| $1.67M | 0.01% |
71,692
-16,134
| -18% | -$366K |
|
1403
PUT
Tractor Supply
TSCO
$15.9B
| $1.66M | 0.01% |
915
+510
| +126% | +$8.49K |
|
1404
PUT
Melco Resorts & Entertainment
MLCO
$2.16B
| $1.66M | 0.01% |
786
-90
| -10% | -$2.09K |
|
1405
CALL
Ventas
VTR
$47.6B
| $1.65M | 0.01% |
304
+188
| +162% | +$10.9K |
|
|
APTI
1406
PUT
DELISTED
Apptio, Inc. Class A Common Stock
APTI
| $1.65M | 0.01% |
447
+375
| +521% | +$14K |
|
1407
CALL
Itron
ITRI
$3.72B
| $1.65M | 0.01% |
257
+217
| +543% | +$13.7K |
|
1408
CALL
Regions Financial
RF
$26.2B
| $1.65M | 0.01% |
899
+650
| +261% | +$12.2K |
|
1409
PUT
Patterson-UTI
PTEN
$3.93B
| $1.65M | 0.01% |
962
+908
| +1,681% | +$15.6K |
|
1410
PUT
PACCAR
PCAR
$68.8B
| $1.64M | 0.01% |
362
-415
| -53% | -$18.3K |
|
|
ULTI
1411
PUT
DELISTED
Ultimate Software Group Inc
ULTI
| $1.64M | 0.01% |
51
-13
| -20% | -$3.85K |
|
|
ANSS
1412
PUT
DELISTED
Ansys
ANSS
| $1.64M | 0.01% |
88
+15
| +21% | +$2.69K |
|
1413
PUT
Angi Inc
ANGI
$219M
| $1.64M | 0.01% |
+70
| New | +$13.5K |
|
|
TWOU
1414
DELISTED
2U Inc
TWOU
| $1.64M | 0.01% |
726
+547
| +306% | +$1.35M |
|
|
WP
1415
DELISTED
Worldpay, Inc.
WP
| $1.64M | 0.01% |
16,179
-18,144
| -53% | -$1.66M |
|
|
WRK
1416
PUT
DELISTED
WestRock Company
WRK
| $1.64M | 0.01% |
306
+285
| +1,357% | +$16K |
|
|
KEM
1417
PUT
DELISTED
KEMET Corporation
KEM
| $1.63M | 0.01% |
881
+804
| +1,044% | +$19.8K |
|
1418
CALL
Liberty Global Class C
LBTYK
$3.37B
| $1.63M | 0.01% |
565
-24
| -4% | -$648 |
|
1419
PUT
Zscaler
ZS
$22.6B
| $1.63M | 0.01% |
400
-39
| -9% | -$1.57K |
|
1420
Sony
SONY
$122B
| $1.63M | 0.01% |
134,240
+123,555
| +1,156% | +$1.36M |
|
1421
Sarepta Therapeutics
SRPT
$1.68B
| $1.63M | 0.01% |
10,085
-6,835
| -40% | -$934K |
|
1422
PUT
Icahn Enterprises
IEP
$5.18B
| $1.62M | 0.01% |
280
+250
| +833% | +$18.5K |
|
|
MNK
1423
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.62M | 0.01% |
55,385
-27,801
| -33% | -$782K |
|
1424
Whirlpool
WHR
$2.31B
| $1.62M | 0.01% |
+13,661
| New | +$1.81M |
|
1425
CALL
Hershey
HSY
$34.9B
| $1.62M | 0.01% |
159
-267
| -63% | -$26.4K |
|
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.