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 | |
|---|---|---|---|---|---|---|
|
JNPR
1851
PUT
DELISTED
Juniper Networks
JNPR
| $1.18M | ﹤0.01% |
445
-113
| -20% | -$3.04K |
|
1852
Cincinnati Financial
CINF
$28.3B
| $1.18M | ﹤0.01% |
+13,695
| New | +$1.13M |
|
1853
PUT
Teradyne
TER
$54.8B
| $1.18M | ﹤0.01% |
295
-292
| -50% | -$10.9K |
|
1854
CALL
Canadian Natural Resources
CNQ
$96.9B
| $1.17M | ﹤0.01% |
872
+184
| +27% | +$2.44K |
|
1855
Bank OZK
OZK
$5.49B
| $1.17M | ﹤0.01% |
40,423
-51,928
| -56% | -$1.57M |
|
|
PBCT
1856
PUT
DELISTED
People's United Financial Inc
PBCT
| $1.17M | ﹤0.01% |
712
-63
| -8% | -$1.05K |
|
1857
PUT
KLA
KLAC
$275B
| $1.17M | ﹤0.01% |
980
-1,540
| -61% | -$16.6K |
|
1858
CALL
Invesco
IVZ
$13.3B
| $1.16M | ﹤0.01% |
603
+28
| +5% | +$524 |
|
1859
CALL
LGI Homes
LGIH
$1.4B
| $1.16M | ﹤0.01% |
193
+56
| +41% | +$3.24K |
|
1860
Advance Auto Parts
AAP
$3.37B
| $1.16M | ﹤0.01% |
+6,814
| New | +$1.1M |
|
1861
PUT
Evolus
EOLS
$394M
| $1.16M | ﹤0.01% |
+514
| New | +$11.1K |
|
|
AERI
1862
DELISTED
Aerie Pharmaceuticals
AERI
| $1.16M | ﹤0.01% |
24,395
+13,186
| +118% | +$580K |
|
|
CBM
1863
CALL
DELISTED
Cambrex Corporation
CBM
| $1.16M | ﹤0.01% |
298
+85
| +40% | +$3.48K |
|
1864
CALL
Ares Capital
ARCC
$13.5B
| $1.16M | ﹤0.01% |
675
-274
| -29% | -$4.59K |
|
1865
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $1.16M | ﹤0.01% |
119
-5
| -4% | -$496 |
|
1866
PUT
Cooper Companies
COO
$13.7B
| $1.16M | ﹤0.01% |
156
+84
| +117% | +$5.86K |
|
1867
Fair Isaac
FICO
$28.7B
| $1.15M | ﹤0.01% |
+4,240
| New | +$996K |
|
1868
CALL
Fidelity National Financial
FNF
$13.9B
| $1.15M | ﹤0.01% |
328
+307
| +1,462% | +$10.3K |
|
1869
Ford
F
$57.3B
| $1.15M | ﹤0.01% |
+131,055
| New | +$1.13M |
|
1870
PUT
Corning
GLW
$126B
| $1.15M | ﹤0.01% |
347
-410
| -54% | -$13.4K |
|
1871
CALL
TripAdvisor
TRIP
$1.59B
| $1.15M | ﹤0.01% |
223
-1,205
| -84% | -$66K |
|
1872
PUT
Brighthouse Financial
BHF
$3.63B
| $1.15M | ﹤0.01% |
+316
| New | +$11.8K |
|
1873
CALL
Autohome
ATHM
$2.43B
| $1.15M | ﹤0.01% |
109
-217
| -67% | -$17.9K |
|
|
OPLN
1874
PUT
Openlane
OPLN
$4.17B
| $1.14M | ﹤0.01% |
589
+378
| +179% | +$7.13K |
|
1875
Molson Coors Class B
TAP
$7.68B
| $1.14M | ﹤0.01% |
19,193
-9,133
| -32% | -$564K |
|
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.