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 | |
|---|---|---|---|---|---|---|
|
THS
2826
PUT
DELISTED
Treehouse Foods
THS
| $416K | ﹤0.01% |
87
+49
| +129% | +$2.52K |
|
2827
Northern Trust
NTRS
$22.2B
| $415K | ﹤0.01% |
+4,066
| New | +$435K |
|
2828
PUT
ResMed
RMD
$28.3B
| $415K | ﹤0.01% |
36
-79
| -69% | -$8.65K |
|
2829
CALL
Terex
TEX
$7.98B
| $415K | ﹤0.01% |
104
+68
| +189% | +$2.77K |
|
2830
CALL
Gogo Inc
GOGO
$515M
| $414K | ﹤0.01% |
799
+766
| +2,321% | +$3.4K |
|
|
CEO
2831
CALL
DELISTED
CNOOC Limited
CEO
| $414K | ﹤0.01% |
21
-42
| -67% | -$7.12K |
|
2832
PUT
Ameriprise Financial
AMP
$46.8B
| $413K | ﹤0.01% |
28
+3
| +12% | +$429 |
|
2833
PUT
Unilever
UL
$131B
| $412K | ﹤0.01% |
67
+53
| +379% | +$3.34K |
|
|
LCI
2834
CALL
DELISTED
Lannett Company, Inc.
LCI
| $412K | ﹤0.01% |
217
+122
| +128% | +$4.65K |
|
2835
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
$351M
| $410K | ﹤0.01% |
1,111
+684
| +160% | +$346K |
|
2836
NovoCure
NVCR
$2.04B
| $410K | ﹤0.01% |
7,842
+7,409
| +1,711% | +$295K |
|
2837
Texas Roadhouse
TXRH
$12.7B
| $410K | ﹤0.01% |
5,926
+5,029
| +561% | +$341K |
|
2838
Western Midstream Partners
WES
$19.6B
| $410K | ﹤0.01% |
+13,705
| New | +$480K |
|
|
BPL
2839
PUT
DELISTED
Buckeye Partners, L.P.
BPL
| $410K | ﹤0.01% |
115
-128
| -53% | -$4.58K |
|
2840
PUT
Compass Minerals
CMP
$1.24B
| $409K | ﹤0.01% |
61
+44
| +259% | +$2.87K |
|
|
EVRI
2841
CALL
DELISTED
Everi Holdings
EVRI
| $409K | ﹤0.01% |
447
+419
| +1,496% | +$3.44K |
|
2842
CALL
MPLX
MPLX
$59.5B
| $409K | ﹤0.01% |
118
-914
| -89% | -$32.7K |
|
|
VRAY
2843
CALL
DELISTED
ViewRay, Inc.
VRAY
| $409K | ﹤0.01% |
437
+427
| +4,270% | +$4.2K |
|
2844
CALL
Gildan
GIL
$9.25B
| $407K | ﹤0.01% |
134
+132
| +6,600% | +$3.83K |
|
2845
Westlake Corp
WLK
$9.46B
| $407K | ﹤0.01% |
+4,904
| New | +$480K |
|
|
TRCO
2846
PUT
DELISTED
TRIBUNE MEDIA COMPANY CLASS A
TRCO
| $407K | ﹤0.01% |
106
+45
| +74% | +$1.62K |
|
2847
CALL
CRA International
CRAI
$1.1B
| $406K | ﹤0.01% |
81
-4
| -5% | -$218 |
|
2848
abrdn Physical Gold Shares ETF
SGOL
$6.92B
| $406K | ﹤0.01% |
35,300
+33,990
| +2,595% | +$398K |
|
|
CHL
2849
CALL
DELISTED
China Mobile Limited
CHL
| $406K | ﹤0.01% |
83
-51
| -38% | -$2.36K |
|
2850
CALL
Encompass Health
EHC
$11.2B
| $405K | ﹤0.01% |
+65
| New | +$3.95K |
|
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.