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 | |
|---|---|---|---|---|---|---|
2776
PUT
ATI
ATI
$27B
| $437K | ﹤0.01% |
148
-16
| -10% | -$430 |
|
2777
PUT
Hess Midstream
HESM
$5.22B
| $437K | ﹤0.01% |
192
-22
| -10% | -$487 |
|
|
GLIBA
2778
DELISTED
GCI Liberty, Inc. Class A Common Stock (DE)
GLIBA
| $437K | ﹤0.01% |
8,570
+8,112
| +1,771% | +$390K |
|
|
QIWI
2779
DELISTED
QIWI PLC
QIWI
| $436K | ﹤0.01% |
33,123
+4,603
| +16% | +$67.9K |
|
2780
PUT
Emcor
EME
$33.1B
| $435K | ﹤0.01% |
58
+31
| +115% | +$2.39K |
|
2781
CALL
Kirby Corp
KEX
$7.95B
| $435K | ﹤0.01% |
53
+39
| +279% | +$3.27K |
|
2782
TripAdvisor
TRIP
$1.59B
| $435K | ﹤0.01% |
+8,537
| New | +$467K |
|
|
EEP
2783
CALL
DELISTED
Enbridge Energy Partners
EEP
| $435K | ﹤0.01% |
396
+11
| +3% | +$124 |
|
|
PF
2784
CALL
DELISTED
Pinnacle Foods, Inc.
PF
| $434K | ﹤0.01% |
67
-593
| -90% | -$39.2K |
|
2785
Weyerhaeuser
WY
$17.3B
| $433K | ﹤0.01% |
+13,443
| New | +$467K |
|
|
MEET
2786
PUT
DELISTED
The Meet Group, Inc. Common Stock
MEET
| $433K | ﹤0.01% |
875
+759
| +654% | +$3.4K |
|
2787
PUT
InfraCap MLP ETF
AMZA
$471M
| $431K | ﹤0.01% |
58
+40
| +222% | +$3.09K |
|
2788
PUT
WD-40
WDFC
$3.1B
| $430K | ﹤0.01% |
+25
| New | +$4.18K |
|
2789
CALL
Welltower
WELL
$178B
| $430K | ﹤0.01% |
67
-110
| -62% | -$7.11K |
|
|
ECHO
2790
CALL
DELISTED
Echo Global Logistics, Inc.
ECHO
| $430K | ﹤0.01% |
139
+90
| +184% | +$2.93K |
|
|
FNSR
2791
CALL
DELISTED
Finisar Corp
FNSR
| $430K | ﹤0.01% |
226
-236
| -51% | -$4.39K |
|
2792
PUT
Bank of Montreal
BMO
$125B
| $429K | ﹤0.01% |
52
+11
| +27% | +$885 |
|
2793
Universal Display
OLED
$3.71B
| $429K | ﹤0.01% |
3,643
-28,235
| -89% | -$3.1M |
|
|
IMGN
2794
DELISTED
Immunogen Inc
IMGN
| $429K | ﹤0.01% |
45,397
+16,321
| +56% | +$157K |
|
|
CTRL
2795
PUT
DELISTED
Control4 Corporation
CTRL
| $429K | ﹤0.01% |
125
-10
| -7% | -$308 |
|
2796
PUT
Aflac
AFL
$63.9B
| $428K | ﹤0.01% |
91
-558
| -86% | -$25.5K |
|
2797
Ball Corp
BALL
$17B
| $428K | ﹤0.01% |
+9,750
| New | +$396K |
|
2798
Etsy
ETSY
$7.65B
| $428K | ﹤0.01% |
8,348
-55,695
| -87% | -$2.56M |
|
2799
CALL
Noodles & Co
NDLS
$90.5M
| $428K | ﹤0.01% |
44
-48
| -52% | -$4.44K |
|
2800
Prologis
PLD
$138B
| $428K | ﹤0.01% |
6,328
+5,009
| +380% | +$329K |
|
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.