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 | |
|---|---|---|---|---|---|---|
2451
CALL
Applied Optoelectronics
AAOI
$8.04B
| $591K | ﹤0.01% |
240
-563
| -70% | -$22.1K |
|
2452
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $591K | ﹤0.01% |
47
+42
| +840% | +$5.31K |
|
2453
PUT
Baytex Energy
BTE
$3.08B
| $591K | ﹤0.01% |
2,034
+2,003
| +6,461% | +$6.14K |
|
2454
CALL
Sea Limited
SE
$61.2B
| $591K | ﹤0.01% |
428
+37
| +9% | +$533 |
|
2455
Bread Financial
BFH
$4.21B
| $590K | ﹤0.01% |
3,135
-7,625
| -71% | -$1.44M |
|
2456
PUT
GDS Holdings
GDS
$6.34B
| $590K | ﹤0.01% |
168
+33
| +24% | +$1.19K |
|
2457
CALL
Navigator Holdings
NVGS
$1.34B
| $590K | ﹤0.01% |
488
+293
| +150% | +$3.6K |
|
2458
VF Corp
VFC
$6.68B
| $590K | ﹤0.01% |
6,716
-38,055
| -85% | -$3.25M |
|
2459
CALL
Westlake Corp
WLK
$9.46B
| $590K | ﹤0.01% |
71
-7
| -9% | -$685 |
|
2460
Canadian Solar
CSIQ
$906M
| $589K | ﹤0.01% |
40,673
-16,027
| -28% | -$221K |
|
2461
CALL
ICICI Bank
IBN
$106B
| $589K | ﹤0.01% |
694
+88
| +15% | +$778 |
|
2462
PUT
A.O. Smith
AOS
$8.38B
| $587K | ﹤0.01% |
110
+92
| +511% | +$5.4K |
|
2463
CALL
Iridium Communications
IRDM
$4.85B
| $587K | ﹤0.01% |
261
+61
| +31% | +$1.19K |
|
|
TIVO
2464
PUT
DELISTED
Tivo Inc
TIVO
| $587K | ﹤0.01% |
472
+238
| +102% | +$3.08K |
|
2465
PUT
Coherent
COHR
$55.2B
| $586K | ﹤0.01% |
124
+100
| +417% | +$4.55K |
|
2466
Golar LNG
GLNG
$4.95B
| $586K | ﹤0.01% |
21,112
-37,512
| -64% | -$994K |
|
2467
Kimco Realty
KIM
$17.6B
| $585K | ﹤0.01% |
34,953
+21,685
| +163% | +$364K |
|
|
EMWP
2468
PUT
DELISTED
Eros Media World PLC
EMWP
| $585K | ﹤0.01% |
24
+15
| +167% | +$3.86K |
|
2469
CALL
Aon
AON
$77.3B
| $584K | ﹤0.01% |
38
-64
| -63% | -$9.36K |
|
2470
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $584K | ﹤0.01% |
128
+73
| +133% | +$3.36K |
|
2471
CALL
Shutterstock
SSTK
$205M
| $584K | ﹤0.01% |
107
+33
| +45% | +$1.7K |
|
2472
PUT
Cheesecake Factory
CAKE
$4.21B
| $583K | ﹤0.01% |
109
+53
| +95% | +$2.87K |
|
2473
CALL
Semtech
SMTC
$11.7B
| $583K | ﹤0.01% |
105
+29
| +38% | +$1.52K |
|
|
NIHD
2474
DELISTED
NII Holdings, Inc. Common Stock
NIHD
| $583K | ﹤0.01% |
99,655
+98,427
| +8,015% | +$506K |
|
2475
CALL
NCR Voyix
VYX
$1.06B
| $582K | ﹤0.01% |
334
+15
| +5% | +$267 |
|
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.