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 | |
|---|---|---|---|---|---|---|
676
CALL
VF Corp
VFC
$6.74B
| $4.54M | 0.01% |
516
-325
| -39% | -$27.7K |
|
|
677
PUT
VF Corp
VFC
$6.74B
| $4.54M | 0.01% |
516
+121
| +31% | +$10.3K |
|
|
AIMC
678
CALL
DELISTED
Altra Industrial Motion Corp
AIMC
| $4.52M | 0.01% |
1,095
+1,085
| +10,850% | +$45.4K |
|
679
CALL
AnaptysBio
ANAB
$1.56B
| $4.52M | 0.01% |
+453
| New | +$37.6K |
|
680
CALL
Conagra Brands
CAG
$7.1B
| $4.49M | 0.01% |
1,321
+597
| +82% | +$21.8K |
|
681
CALL
Analog Devices
ADI
$188B
| $4.48M | 0.01% |
485
-88
| -15% | -$8.46K |
|
682
CALL
Nucor
NUE
$53.7B
| $4.47M | 0.01% |
705
-324
| -31% | -$20.7K |
|
|
XLNX
683
CALL
DELISTED
Xilinx Inc
XLNX
| $4.47M | 0.01% |
558
-205
| -27% | -$15K |
|
684
CALL
First Solar
FSLR
$22.4B
| $4.46M | 0.01% |
921
-623
| -40% | -$32.3K |
|
|
DNB
685
CALL
DELISTED
Dun & Bradstreet
DNB
| $4.45M | 0.01% |
312
+264
| +550% | +$35.9K |
|
|
LSI
686
PUT
DELISTED
Life Storage, Inc.
LSI
| $4.44M | 0.01% |
701
+36
| +5% | +$2.33K |
|
687
PUT
Five Below
FIVE
$11.3B
| $4.43M | 0.01% |
341
-561
| -62% | -$62.4K |
|
688
PUT
APA Corp
APA
$12.8B
| $4.43M | 0.01% |
929
+336
| +57% | +$15.1K |
|
689
American International
AIG
$41.5B
| $4.42M | 0.01% |
82,997
+3,339
| +4% | +$179K |
|
|
SCHW
690
PUT
Charles Schwab
SCHW
$175B
| $4.39M | 0.01% |
894
-254
| -22% | -$13K |
|
|
ETP
691
PUT
DELISTED
Energy Transfer Partners, L.P.
ETP
| $4.39M | 0.01% |
1,974
+1,696
| +610% | +$36.8K |
|
692
PUT
TJX Companies
TJX
$172B
| $4.39M | 0.01% |
784
-714
| -48% | -$36.7K |
|
|
SRG
693
PUT
Seritage Growth Properties
SRG
$133M
| $4.39M | 0.01% |
924
+205
| +29% | +$9.71K |
|
|
GWPH
694
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $4.37M | 0.01% |
253
+52
| +26% | +$7.5K |
|
695
Spotify
SPOT
$97.5B
| $4.37M | 0.01% |
24,148
+6,190
| +34% | +$1.14M |
|
696
IBM
IBM
$193B
| $4.36M | 0.01% |
30,178
-84,202
| -74% | -$11.8M |
|
697
CALL
Tandem Diabetes Care
TNDM
$1.16B
| $4.36M | 0.01% |
1,018
-215
| -17% | -$7.51K |
|
|
698
Apple
AAPL
$4.79T
| $4.35M | 0.01% |
77,088
-882,612
| -92% | -$46M |
|
699
CALL
National Beverage
FIZZ
$2.91B
| $4.35M | 0.01% |
746
+362
| +94% | +$20.3K |
|
700
PUT
Bread Financial
BFH
$4.12B
| $4.34M | 0.01% |
231
-188
| -45% | -$35.4K |
|
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.