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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1826
Becton Dickinson
BDX
$43.1B
| $1.21M | ﹤0.01% |
+4,979
| New | +$1.18M |
|
|
WW
1827
PUT
DELISTED
WW International
WW
| $1.21M | ﹤0.01% |
602
-934
| -61% | -$25.8K |
|
1828
PUT
LPL Financial
LPLA
$26.3B
| $1.21M | ﹤0.01% |
174
+87
| +100% | +$6.27K |
|
1829
CALL
Advance Auto Parts
AAP
$3.37B
| $1.21M | ﹤0.01% |
71
-375
| -84% | -$60.6K |
|
1830
CALL
Crane NXT
CXT
$3.04B
| $1.21M | ﹤0.01% |
412
+389
| +1,691% | +$11K |
|
1831
CALL
Dover
DOV
$27.2B
| $1.21M | ﹤0.01% |
129
-35
| -21% | -$3.02K |
|
|
EBIX
1832
CALL
DELISTED
Ebix Inc
EBIX
| $1.21M | ﹤0.01% |
245
-286
| -54% | -$15.1K |
|
1833
AGNC Investment
AGNC
$12.3B
| $1.21M | ﹤0.01% |
67,006
-31,137
| -32% | -$556K |
|
1834
Transocean
RIG
$5.92B
| $1.2M | ﹤0.01% |
138,282
-85,053
| -38% | -$729K |
|
1835
CALL
Dillards
DDS
$8.87B
| $1.2M | ﹤0.01% |
167
+55
| +49% | +$3.78K |
|
1836
PUT
Medpace
MEDP
$16.8B
| $1.2M | ﹤0.01% |
204
+203
| +20,300% | +$12.1K |
|
|
KL
1837
PUT
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $1.2M | ﹤0.01% |
395
+275
| +229% | +$8.71K |
|
|
ZAYO
1838
PUT
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $1.2M | ﹤0.01% |
422
-315
| -43% | -$8.36K |
|
|
DMC
1839
PUT
Del Monte Corp
DMC
$1.35B
| $1.2M | ﹤0.01% |
443
+346
| +357% | +$10.2K |
|
|
LCI
1840
PUT
DELISTED
Lannett Company, Inc.
LCI
| $1.2M | ﹤0.01% |
381
+351
| +1,170% | +$11.3K |
|
1841
PVH
PVH
$3.71B
| $1.19M | ﹤0.01% |
9,793
-11,282
| -54% | -$1.24M |
|
1842
PUT
Ethan Allen Interiors
ETD
$581M
| $1.19M | ﹤0.01% |
624
+619
| +12,380% | +$11.8K |
|
|
XLRN
1843
PUT
DELISTED
Acceleron Pharma
XLRN
| $1.19M | ﹤0.01% |
256
+255
| +25,500% | +$11.2K |
|
1844
CALL
Lincoln National
LNC
$7.91B
| $1.19M | ﹤0.01% |
203
+150
| +283% | +$8.88K |
|
1845
CALL
Nokia
NOK
$50.8B
| $1.19M | ﹤0.01% |
2,080
+718
| +53% | +$4.39K |
|
|
MIK
1846
PUT
DELISTED
Michaels Stores, Inc
MIK
| $1.19M | ﹤0.01% |
1,041
+961
| +1,201% | +$13.2K |
|
|
VGR
1847
PUT
DELISTED
Vector Group Ltd.
VGR
| $1.18M | ﹤0.01% |
1,624
-1,854
| -53% | -$13.8K |
|
1848
CALL
Hershey
HSY
$35.4B
| $1.18M | ﹤0.01% |
103
-154
| -60% | -$16.8K |
|
1849
CALL
Weyerhaeuser
WY
$17.3B
| $1.18M | ﹤0.01% |
449
-171
| -28% | -$4.31K |
|
|
CSFL
1850
PUT
DELISTED
CenterState Bank Corporation Common Stock
CSFL
| $1.18M | ﹤0.01% |
495
+155
| +46% | +$3.83K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.