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 | |
|---|---|---|---|---|---|---|
826
Snap
SNAP
$7.52B
| $3.58M | 0.01% |
+421,838
| New | +$4.9M |
|
827
Edwards Lifesciences
EW
$48.6B
| $3.54M | 0.01% |
61,047
-27,765
| -31% | -$1.36M |
|
828
iShares MSCI Mexico ETF
EWW
$1.92B
| $3.54M | 0.01% |
69,098
+64,002
| +1,256% | +$3.24M |
|
829
PUT
GameStop
GME
$9.69B
| $3.54M | 0.01% |
9,268
+480
| +5% | +$1.84K |
|
830
PUT
HSBC
HSBC
$354B
| $3.53M | 0.01% |
843
+643
| +322% | +$27.9K |
|
831
CALL
KKR & Co
KKR
$85.8B
| $3.53M | 0.01% |
1,295
+986
| +319% | +$26.3K |
|
832
PUT
Parker-Hannifin
PH
$122B
| $3.53M | 0.01% |
192
-306
| -61% | -$52.6K |
|
833
CALL
Darden Restaurants
DRI
$22.2B
| $3.52M | 0.01% |
317
-546
| -63% | -$61.5K |
|
|
EGRX
834
CALL
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $3.52M | 0.01% |
507
+167
| +49% | +$12.7K |
|
835
CALL
EQT Corp
EQT
$33.8B
| $3.51M | 0.01% |
1,457
+498
| +52% | +$13.7K |
|
836
PUT
Sherwin-Williams
SHW
$78.9B
| $3.5M | 0.01% |
231
-114
| -33% | -$16.9K |
|
837
TAL Education Group
TAL
$5.73B
| $3.48M | 0.01% |
135,325
+58,388
| +76% | +$1.89M |
|
|
CYBR
838
DELISTED
CyberArk
CYBR
| $3.46M | 0.01% |
43,411
+37,524
| +637% | +$2.64M |
|
839
CALL
iShares MSCI Global Gold Miners ETF
RING
$2.36B
| $3.46M | 0.01% |
669
-68
| -9% | -$1.06K |
|
840
ProShares Ultra S&P500
SSO
$8.02B
| $3.46M | 0.01% |
217,232
-5,344
| -2% | -$81.6K |
|
|
AMRN
841
Amarin Corp
AMRN
$287M
| $3.46M | 0.01% |
10,634
+9,690
| +1,026% | +$732K |
|
842
CALL
Zoetis
ZTS
$31.1B
| $3.46M | 0.01% |
378
+85
| +29% | +$7.54K |
|
843
Kraft Heinz
KHC
$30.8B
| $3.46M | 0.01% |
62,755
+19,602
| +45% | +$1.17M |
|
844
PUT
Radware
RDWR
$1.24B
| $3.45M | 0.01% |
1,302
+17
| +1% | +$456 |
|
845
CALL
Corpay
CPAY
$23.5B
| $3.44M | 0.01% |
151
-226
| -60% | -$49.3K |
|
846
PUT
Vulcan Materials
VMC
$36B
| $3.42M | 0.01% |
308
+254
| +470% | +$29.5K |
|
847
TransDigm Group
TDG
$66.8B
| $3.41M | 0.01% |
9,168
+1,730
| +23% | +$623K |
|
848
CALL
Sinclair Inc
SBGI
$999M
| $3.41M | 0.01% |
1,203
+694
| +136% | +$19.7K |
|
849
CALL
AeroVironment
AVAV
$7.61B
| $3.41M | 0.01% |
304
+160
| +111% | +$13.9K |
|
|
AET
850
CALL
DELISTED
Aetna Inc
AET
| $3.41M | 0.01% |
168
+123
| +273% | +$24K |
|
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.