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 | |
|---|---|---|---|---|---|---|
|
DENT
3451
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $239K | ﹤0.01% |
107
-18
| -14% | -$40.2K |
|
|
SIVB
3452
DELISTED
SVB Financial Group
SIVB
| $239K | ﹤0.01% |
772
-1,173
| -60% | -$370K |
|
3453
Halozyme
HALO
$9.66B
| $238K | ﹤0.01% |
13,135
+5,418
| +70% | +$94.9K |
|
3454
CALL
Quad
QUAD
$438M
| $237K | ﹤0.01% |
114
+86
| +307% | +$1.85K |
|
|
PBFX
3455
CALL
DELISTED
PBF LOGISTICS LP
PBFX
| $237K | ﹤0.01% |
110
+81
| +279% | +$1.75K |
|
3456
PUT
Banner Corp
BANR
$2.39B
| $236K | ﹤0.01% |
+38
| New | +$2.43K |
|
3457
PUT
Boyd Gaming
BYD
$6.64B
| $236K | ﹤0.01% |
70
+27
| +63% | +$965 |
|
3458
CALL
Calix
CALX
$2.32B
| $236K | ﹤0.01% |
292
+193
| +195% | +$1.47K |
|
3459
CALL
Carlyle Group
CG
$16.7B
| $236K | ﹤0.01% |
105
-140
| -57% | -$3.29K |
|
3460
PUT
Carter's
CRI
$1.43B
| $236K | ﹤0.01% |
24
-350
| -94% | -$37K |
|
3461
CALL
NewtekOne
NEWT
$415M
| $236K | ﹤0.01% |
113
+39
| +53% | +$854 |
|
3462
Pixelworks
PXLW
$37.9M
| $236K | ﹤0.01% |
4,375
-677
| -13% | -$34K |
|
3463
CALL
Atara Biotherapeutics
ATRA
$69.5M
| $235K | ﹤0.01% |
2
-2
| -50% | -$1.96K |
|
3464
PUT
Cameco
CCJ
$38.9B
| $235K | ﹤0.01% |
207
-53
| -20% | -$557 |
|
3465
PUT
Crown Holdings
CCK
$12.9B
| $235K | ﹤0.01% |
49
+5
| +11% | +$222 |
|
3466
PUT
CRISPR Therapeutics
CRSP
$4.6B
| $235K | ﹤0.01% |
53
-123
| -70% | -$6.44K |
|
3467
PUT
Oshkosh
OSK
$9.66B
| $235K | ﹤0.01% |
33
-19
| -37% | -$1.37K |
|
3468
CALL
Prosperity Bancshares
PB
$8.69B
| $235K | ﹤0.01% |
34
+19
| +127% | +$1.37K |
|
3469
Prospect Capital
PSEC
$1.12B
| $235K | ﹤0.01% |
32,118
+10,585
| +49% | +$74.9K |
|
|
INFN
3470
PUT
DELISTED
Infinera Corporation Common Stock
INFN
| $235K | ﹤0.01% |
323
+168
| +108% | +$1.43K |
|
|
BRS
3471
CALL
DELISTED
Bristow Group, Inc.
BRS
| $235K | ﹤0.01% |
194
+4
| +2% | +$49 |
|
|
HIMX
3472
PUT
Himax Technologies
HIMX
$2.22B
| $234K | ﹤0.01% |
399
-365
| -48% | -$2.43K |
|
3473
PUT
Kodak
KODK
$788M
| $234K | ﹤0.01% |
757
-144
| -16% | -$470 |
|
|
NETI
3474
PUT
DELISTED
Eneti Inc.
NETI
| $234K | ﹤0.01% |
35
-10
| -22% | -$652 |
|
|
XLNX
3475
DELISTED
Xilinx Inc
XLNX
| $234K | ﹤0.01% |
2,929
-18,214
| -86% | -$1.33M |
|
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.