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 | |
|---|---|---|---|---|---|---|
1551
CALL
Diageo
DEO
$46.3B
| $1.4M | ﹤0.01% |
99
-93
| -48% | -$13.3K |
|
1552
CALL
Acuity Brands
AYI
$9.77B
| $1.4M | ﹤0.01% |
89
+68
| +324% | +$9.76K |
|
1553
CALL
Harley-Davidson
HOG
$2.71B
| $1.4M | ﹤0.01% |
308
-669
| -68% | -$29K |
|
1554
iShares MSCI Japan ETF
EWJ
$21.7B
| $1.39M | ﹤0.01% |
+23,158
| New | +$1.35M |
|
1555
CALL
ArcelorMittal
MT
$50.4B
| $1.39M | ﹤0.01% |
452
-336
| -43% | -$10.2K |
|
|
RDUS
1556
PUT
DELISTED
Radius Health, Inc.
RDUS
| $1.39M | ﹤0.01% |
783
+300
| +62% | +$6.79K |
|
1557
iShares Expanded Tech-Software Sector ETF
IGV
$13B
| $1.39M | ﹤0.01% |
33,965
-19,055
| -36% | -$746K |
|
1558
Bath & Body Works
BBWI
$4.01B
| $1.39M | ﹤0.01% |
56,760
+36,374
| +178% | +$910K |
|
1559
CALL
TransUnion
TRU
$14.8B
| $1.39M | ﹤0.01% |
189
+188
| +18,800% | +$14K |
|
1560
CALL
Expeditors International
EXPD
$23.1B
| $1.39M | ﹤0.01% |
189
-4
| -2% | -$296 |
|
1561
PUT
Kimco Realty
KIM
$17.5B
| $1.39M | ﹤0.01% |
830
+302
| +57% | +$5.07K |
|
|
AZUL
1562
DELISTED
Azul
AZUL
| $1.38M | ﹤0.01% |
+77,851
| New | +$1.38M |
|
|
DFS
1563
CALL
DELISTED
Discover Financial Services
DFS
| $1.38M | ﹤0.01% |
181
+33
| +22% | +$2.48K |
|
1564
PUT
GoPro
GPRO
$115M
| $1.38M | ﹤0.01% |
1,916
+1,783
| +1,341% | +$11.4K |
|
1565
CALL
Allison Transmission
ALSN
$10.1B
| $1.38M | ﹤0.01% |
265
+197
| +290% | +$9.24K |
|
1566
PUT
Wintrust Financial
WTFC
$10.7B
| $1.38M | ﹤0.01% |
+162
| New | +$14.4K |
|
1567
CALL
Idexx Laboratories
IDXX
$43.1B
| $1.37M | ﹤0.01% |
55
-9
| -14% | -$2.19K |
|
|
CTRA
1568
DELISTED
Coterra Energy
CTRA
| $1.37M | ﹤0.01% |
60,910
+5,520
| +10% | +$129K |
|
1569
Vicor
VICR
$9.55B
| $1.37M | ﹤0.01% |
29,823
-13,805
| -32% | -$759K |
|
1570
PUT
Cenovus Energy
CVE
$54.8B
| $1.37M | ﹤0.01% |
1,366
+1,010
| +284% | +$9.86K |
|
1571
CALL
Columbia Sportswear
COLM
$3.19B
| $1.37M | ﹤0.01% |
147
+65
| +79% | +$5.91K |
|
1572
PUT
Liberty Media Series A
FWONA
$22.3B
| $1.37M | ﹤0.01% |
350
-71
| -17% | -$2.35K |
|
1573
CALL
Copart
CPRT
$25.9B
| $1.36M | ﹤0.01% |
1,060
-112
| -10% | -$1.67K |
|
1574
PUT
Axalta
AXTA
$7.02B
| $1.36M | ﹤0.01% |
468
-170
| -27% | -$5.1K |
|
1575
CALL
BJ's Restaurants
BJRI
$1.4B
| $1.36M | ﹤0.01% |
189
-492
| -72% | -$33K |
|
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.