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 | |
|---|---|---|---|---|---|---|
|
CTRL
2176
CALL
DELISTED
Control4 Corporation
CTRL
| $751K | ﹤0.01% |
219
+32
| +17% | +$986 |
|
2177
PUT
Middleby
MIDD
$6.05B
| $750K | ﹤0.01% |
58
+25
| +76% | +$2.85K |
|
|
WRD
2178
DELISTED
WildHorse Resource Development
WRD
| $750K | ﹤0.01% |
31,729
+24,899
| +365% | +$535K |
|
2179
CALL
Fortive
FTV
$19B
| $749K | ﹤0.01% |
141
-182
| -56% | -$9.33K |
|
|
LM
2180
PUT
DELISTED
Legg Mason, Inc.
LM
| $749K | ﹤0.01% |
240
-473
| -66% | -$15.3K |
|
2181
CALL
Hormel Foods
HRL
$13.9B
| $748K | ﹤0.01% |
190
+119
| +168% | +$4.56K |
|
2182
CALL
Cognex
CGNX
$10.3B
| $747K | ﹤0.01% |
134
+77
| +135% | +$3.95K |
|
2183
Sturm, Ruger & Co
RGR
$610M
| $747K | ﹤0.01% |
10,831
+10,590
| +4,394% | +$641K |
|
|
PEGI
2184
CALL
DELISTED
Pattern Energy Group Inc. Class A
PEGI
| $747K | ﹤0.01% |
376
+354
| +1,609% | +$6.83K |
|
2185
Camping World
CWH
$363M
| $745K | ﹤0.01% |
34,988
-14,130
| -29% | -$311K |
|
2186
PUT
Pentair
PNR
$10.2B
| $745K | ﹤0.01% |
177
+10
| +6% | +$434 |
|
|
SRCL
2187
DELISTED
Stericycle Inc
SRCL
| $745K | ﹤0.01% |
12,709
+8,587
| +208% | +$548K |
|
|
ESL
2188
PUT
DELISTED
Esterline Technologies
ESL
| $745K | ﹤0.01% |
82
+64
| +356% | +$5.38K |
|
|
LLL
2189
PUT
DELISTED
L3 Technologies, Inc.
LLL
| $744K | ﹤0.01% |
35
-35
| -50% | -$7.29K |
|
|
ASXC
2190
CALL
DELISTED
Asensus Surgical, Inc.
ASXC
| $742K | ﹤0.01% |
99
+14
| +16% | +$947 |
|
|
AMRS
2191
CALL
DELISTED
Amyris Inc.
AMRS
| $742K | ﹤0.01% |
935
+803
| +608% | +$5.91K |
|
|
CCMP
2192
CALL
DELISTED
CMC Materials, Inc. Common Stock
CCMP
| $742K | ﹤0.01% |
72
+15
| +26% | +$1.69K |
|
|
ETP
2193
CALL
DELISTED
Energy Transfer Partners, L.P.
ETP
| $742K | ﹤0.01% |
334
-442
| -57% | -$9.6K |
|
2194
CALL
News Corp Class B
NWS
$16.4B
| $740K | ﹤0.01% |
561
+558
| +18,600% | +$8.03K |
|
2195
CALL
Penske Automotive Group
PAG
$14.3B
| $739K | ﹤0.01% |
156
+108
| +225% | +$5.49K |
|
2196
Akamai
AKAM
$16.8B
| $738K | ﹤0.01% |
10,092
-8,496
| -46% | -$638K |
|
2197
CALL
Factset
FDS
$9.05B
| $738K | ﹤0.01% |
33
-68
| -67% | -$14.8K |
|
|
CVSA
2198
CALL
Covista Inc
CVSA
$3.94B
| $737K | ﹤0.01% |
153
+40
| +35% | +$2.02K |
|
2199
PUT
Sunoco
SUN
$14.2B
| $735K | ﹤0.01% |
249
+98
| +65% | +$2.64K |
|
|
XOXO
2200
CALL
DELISTED
Xo Group Inc
XOXO
| $734K | ﹤0.01% |
+213
| New | +$6.59K |
|
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.