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 | |
|---|---|---|---|---|---|---|
|
CB
1876
CALL
DELISTED
CHUBB CORPORATION
CB
| $53K | ﹤0.01% |
45
+27
| +150% | +$3.5K |
|
1877
PUT
Constellium
CSTM
$3.96B
| $52K | ﹤0.01% |
73
-73
| -50% | -$509 |
|
1878
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
| $52K | ﹤0.01% |
467
+456
| +4,145% | +$6.6K |
|
|
HES
1879
DELISTED
Hess
HES
| $52K | ﹤0.01% |
1,075
-14,222
| -93% | -$807K |
|
1880
CALL
NextEra Energy
NEE
$187B
| $52K | ﹤0.01% |
736
+128
| +21% | +$3.24K |
|
1881
Neogen
NEOG
$2.05B
| $52K | ﹤0.01% |
2,496
-2,664
| -52% | -$54.3K |
|
1882
CALL
NeoGenomics
NEO
$1.81B
| $52K | ﹤0.01% |
394
+368
| +1,415% | +$2.69K |
|
1883
CALL
Owens Corning
OC
$11.5B
| $52K | ﹤0.01% |
455
+33
| +8% | +$1.51K |
|
1884
CALL
Bank OZK
OZK
$5.49B
| $52K | ﹤0.01% |
178
+160
| +889% | +$8.04K |
|
1885
SouthState Bank Corp
SSB
$10.3B
| $52K | ﹤0.01% |
732
-376
| -34% | -$28.6K |
|
1886
PUT
UBS Group
UBS
$170B
| $52K | ﹤0.01% |
+143
| New | +$2.79K |
|
1887
Dentsply Sirona
XRAY
$2.59B
| $52K | ﹤0.01% |
867
-2,391
| -73% | -$142K |
|
|
AREX
1888
DELISTED
Approach Resources Inc.
AREX
| $52K | ﹤0.01% |
+28,558
| New | +$64K |
|
|
ZGNX
1889
DELISTED
Zogenix, Inc.
ZGNX
| $52K | ﹤0.01% |
3,528
-822
| -19% | -$11.1K |
|
1890
PUT
Archer Daniels Midland
ADM
$41.4B
| $51K | ﹤0.01% |
89
-3
| -3% | -$120 |
|
1891
CALL
ANI Pharmaceuticals
ANIP
$1.77B
| $51K | ﹤0.01% |
231
+174
| +305% | +$7.49K |
|
1892
CALL
D.R. Horton
DHI
$41B
| $51K | ﹤0.01% |
264
-485
| -65% | -$15.1K |
|
|
HIMX
1893
CALL
Himax Technologies
HIMX
$2.2B
| $51K | ﹤0.01% |
293
+191
| +187% | +$1.38K |
|
1894
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $51K | ﹤0.01% |
566
+272
| +93% | +$4.64K |
|
1895
CALL
Nordic American Tanker
NAT
$1.37B
| $51K | ﹤0.01% |
501
+425
| +559% | +$6.44K |
|
1896
PUT
Pentair
PNR
$10.2B
| $51K | ﹤0.01% |
228
+162
| +245% | +$5.92K |
|
1897
Universal Health Services
UHS
$9.43B
| $51K | ﹤0.01% |
432
-3,488
| -89% | -$426K |
|
1898
PUT
NCR Voyix
VYX
$1.06B
| $51K | ﹤0.01% |
272
-8
| -3% | -$127 |
|
|
MMP
1899
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $51K | ﹤0.01% |
176
+28
| +19% | +$1.81K |
|
|
ECOM
1900
DELISTED
CHANNELADVISOR CORPORATION
ECOM
| $51K | ﹤0.01% |
3,724
+2,973
| +396% | +$35.4K |
|
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.