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 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 9.5% |
| 2 | Healthcare | 7.55% |
| 3 | Technology | 7.01% |
| 4 | Communication Services | 6.66% |
| 5 | Industrials | 5.76% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1851
Gogo Inc
GOGO
$515M
| $54K | ﹤0.01% |
+3,069
| New | +$52.2K |
|
1852
PUT
HP
HPQ
$23.5B
| $54K | ﹤0.01% |
517
-4,310
| -89% | -$55.2K |
|
1853
PUT
Eli Lilly
LLY
$1.07T
| $54K | ﹤0.01% |
792
-1,074
| -58% | -$89.1K |
|
1854
Direxion Daily 20+ Year Treasury Bear 3X ETF
TMV
$180M
| $54K | ﹤0.01% |
776
-2,308
| -75% | -$161K |
|
1855
PUT
Telefônica Brasil
VIV
$22.4B
| $54K | ﹤0.01% |
72
-2
| -3% | -$20 |
|
|
NBIS
1856
PUT
Nebius Group N.V.
NBIS
$47.7B
| $54K | ﹤0.01% |
71
+16
| +29% | +$239 |
|
|
SGEN
1857
PUT
DELISTED
Seagen Inc. Common Stock
SGEN
| $54K | ﹤0.01% |
187
+112
| +149% | +$4.66K |
|
|
PAY
1858
DELISTED
Verifone Systems Inc
PAY
| $54K | ﹤0.01% |
+1,933
| New | +$55.8K |
|
|
CAB
1859
CALL
DELISTED
Cabela's Inc
CAB
| $54K | ﹤0.01% |
158
-46
| -23% | -$2.03K |
|
1860
Adecoagro
AGRO
$1.53B
| $53K | ﹤0.01% |
4,358
+4,243
| +3,690% | +$44.8K |
|
1861
Atmos Energy
ATO
$29.9B
| $53K | ﹤0.01% |
+856
| New | +$52.6K |
|
1862
CALL
Centene
CNC
$31.3B
| $53K | ﹤0.01% |
430
-304
| -41% | -$9.01K |
|
1863
CALL
Intuit
INTU
$81.1B
| $53K | ﹤0.01% |
159
+122
| +330% | +$11.8K |
|
1864
PUT
JD.com
JD
$40.8B
| $53K | ﹤0.01% |
620
-464
| -43% | -$13.7K |
|
1865
PUT
CarMax
KMX
$8.27B
| $53K | ﹤0.01% |
207
+92
| +80% | +$5.25K |
|
1866
CALL
MPLX
MPLX
$59.5B
| $53K | ﹤0.01% |
+290
| New | +$10.9K |
|
1867
PUT
Nucor
NUE
$56.4B
| $53K | ﹤0.01% |
177
-4
| -2% | -$164 |
|
1868
CALL
Sysco
SYY
$39.7B
| $53K | ﹤0.01% |
390
-106
| -21% | -$4.35K |
|
1869
CALL
Thermo Fisher Scientific
TMO
$211B
| $53K | ﹤0.01% |
98
-356
| -78% | -$47.5K |
|
1870
CALL
LendingTree
TREE
$544M
| $53K | ﹤0.01% |
+246
| New | +$25.3K |
|
|
RICE
1871
PUT
DELISTED
Rice Energy Inc.
RICE
| $53K | ﹤0.01% |
47
-1
| -2% | -$14 |
|
|
FSYS
1872
DELISTED
FUEL SYSTEMS SOLUTIONS INC COM STK
FSYS
| $53K | ﹤0.01% |
+10,955
| New | +$62.5K |
|
|
OVTI
1873
PUT
DELISTED
OMNIVISION TECHNOLOGIES INC
OVTI
| $53K | ﹤0.01% |
1,492
+831
| +126% | +$23.9K |
|
|
ZGNX
1874
PUT
DELISTED
Zogenix, Inc.
ZGNX
| $53K | ﹤0.01% |
135
-71
| -34% | -$955 |
|
|
ROI
1875
CALL
DELISTED
WISDOMTREE LARGECAP GROWTH FUND
ROI
| $53K | ﹤0.01% |
850
+550
| +183% | +$34.3K |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading's Q4 2015 filing shows 1,417 new, 1,993 increased, 1,803 reduced and 1,598 closed positions. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M. The largest sale was iShares Russell 2000 ETF, an estimated $27.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 9.5% of assets, up from 4.6% a quarter earlier, followed by Healthcare and Technology.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,417 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.