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 | |
|---|---|---|---|---|---|---|
326
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $11.3M | 0.04% |
307
-77
| -20% | -$28.2K |
|
327
CALL
Illumina
ILMN
$29.1B
| $11.3M | 0.04% |
316
-15
| -5% | -$4.81K |
|
328
PUT
AT&T
T
$158B
| $11.3M | 0.04% |
4,439
-6,130
| -58% | -$150K |
|
329
PUT
Skyworks Solutions
SWKS
$9.46B
| $11.2M | 0.04% |
1,239
+395
| +47% | +$37K |
|
330
CALL
Boston Scientific
BSX
$63.7B
| $11.2M | 0.04% |
2,914
+1,565
| +116% | +$54.7K |
|
331
PUT
Nutanix
NTNX
$14.4B
| $11.2M | 0.04% |
2,626
-561
| -18% | -$29.6K |
|
332
CALL
JD.com
JD
$40.8B
| $11.2M | 0.04% |
4,291
-1,100
| -20% | -$36K |
|
333
CALL
Intuit
INTU
$78.1B
| $11.1M | 0.04% |
488
-33
| -6% | -$7.09K |
|
334
CALL
Norfolk Southern
NSC
$74.3B
| $11.1M | 0.04% |
613
-5
| -0.8% | -$854 |
|
335
CALL
Northrop Grumman
NOC
$74.4B
| $11M | 0.04% |
346
-90
| -21% | -$27.4K |
|
336
PUT
Verizon
VZ
$184B
| $11M | 0.04% |
2,056
-3
| -0.1% | -$159 |
|
337
PUT
Texas Instruments
TXN
$267B
| $11M | 0.04% |
1,023
+362
| +55% | +$40.3K |
|
|
SPLK
338
PUT
DELISTED
Splunk Inc
SPLK
| $11M | 0.04% |
907
+172
| +23% | +$19.1K |
|
339
PUT
CVS Health
CVS
$139B
| $10.9M | 0.04% |
1,387
-1,230
| -47% | -$87.9K |
|
340
CALL
Take-Two Interactive
TTWO
$43.3B
| $10.9M | 0.03% |
788
-377
| -32% | -$48.1K |
|
341
PUT
AB InBev
BUD
$161B
| $10.8M | 0.03% |
1,239
+605
| +95% | +$59K |
|
342
CALL
S&P Global
SPGI
$127B
| $10.7M | 0.03% |
550
+277
| +101% | +$57.2K |
|
343
CALL
Hilton Worldwide
HLT
$73.7B
| $10.7M | 0.03% |
1,329
+615
| +86% | +$48.5K |
|
344
CALL
Universal Display
OLED
$3.81B
| $10.7M | 0.03% |
908
-842
| -48% | -$92.6K |
|
|
AABA
345
PUT
DELISTED
Altaba Inc
AABA
| $10.7M | 0.03% |
1,571
-197
| -11% | -$13.9K |
|
346
CALL
New Oriental
EDU
$7.76B
| $10.7M | 0.03% |
1,442
+825
| +134% | +$68.4K |
|
347
CALL
PG&E
PCG
$39.6B
| $10.7M | 0.03% |
2,316
+105
| +5% | +$4.68K |
|
348
CALL
ProShares Ultra S&P500
SSO
$8.03B
| $10.6M | 0.03% |
7,968
+96
| +1% | +$1.47K |
|
349
CALL
Campbell Soup
CPB
$6.59B
| $10.6M | 0.03% |
2,898
-211
| -7% | -$8.6K |
|
|
350
PUT
PG&E
PCG
$39.6B
| $10.6M | 0.03% |
2,305
-520
| -18% | -$23.2K |
|
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.