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 | |
|---|---|---|---|---|---|---|
|
ITC
951
CALL
DELISTED
ITC HOLDINGS CORP
ITC
| $179K | 0.01% |
559
+504
| +916% | +$17.5K |
|
|
SBNY
952
CALL
DELISTED
Signature Bank
SBNY
| $179K | 0.01% |
118
+71
| +151% | +$10.7K |
|
|
TWC
953
CALL
DELISTED
TIME WARNER CABLE INC NEW COM STK
TWC
| $179K | 0.01% |
319
-454
| -59% | -$84.2K |
|
954
Herc Holdings
HRI
$5.43B
| $178K | 0.01% |
4,173
+3,165
| +314% | +$159K |
|
955
CALL
lululemon athletica
LULU
$13B
| $178K | 0.01% |
844
-837
| -50% | -$42.2K |
|
956
Vicor
VICR
$9.62B
| $178K | 0.01% |
19,614
+3,814
| +24% | +$36.8K |
|
|
MDCO
957
DELISTED
Medicines Co
MDCO
| $178K | 0.01% |
4,784
-1,687
| -26% | -$63.8K |
|
958
PUT
Dillards
DDS
$8.87B
| $177K | 0.01% |
123
+60
| +95% | +$4.83K |
|
959
Mohawk Industries
MHK
$6.9B
| $177K | 0.01% |
+935
| New | +$179K |
|
960
PUT
Thermo Fisher Scientific
TMO
$211B
| $177K | 0.01% |
300
-9
| -3% | -$1.2K |
|
|
AMAG
961
DELISTED
AMAG Pharmaceuticals
AMAG
| $177K | 0.01% |
5,879
-40
| -0.7% | -$1.29K |
|
|
GWR
962
DELISTED
Genesee & Wyoming Inc.
GWR
| $177K | 0.01% |
3,305
-4,652
| -58% | -$294K |
|
963
Brunswick
BC
$5.19B
| $176K | 0.01% |
+3,485
| New | +$180K |
|
964
PUT
El Pollo Loco
LOCO
$485M
| $176K | 0.01% |
163
+95
| +140% | +$1.13K |
|
|
EXPR
965
DELISTED
Express, Inc.
EXPR
| $176K | 0.01% |
511
-75
| -13% | -$27K |
|
|
ASRT
966
PUT
DELISTED
Assertio
ASRT
| $175K | 0.01% |
13
+10
| +333% | +$11.3K |
|
967
PUT
Canadian Pacific Kansas City
CP
$82B
| $175K | 0.01% |
660
| – | – |
|
968
Meritage Homes
MTH
$4.87B
| $175K | 0.01% |
10,348
+8,320
| +410% | +$152K |
|
969
PUT
Shake Shack
SHAK
$2.3B
| $175K | 0.01% |
92
-129
| -58% | -$5.66K |
|
|
CLVS
970
DELISTED
Clovis Oncology, Inc.
CLVS
| $175K | 0.01% |
5,021
+3,955
| +371% | +$255K |
|
|
BNY
971
Bank of New York Mellon
BNY
$108B
| $174K | 0.01% |
4,232
-1,547
| -27% | -$65K |
|
972
CALL
Darden Restaurants
DRI
$22.5B
| $174K | 0.01% |
618
+469
| +315% | +$27.2K |
|
973
PUT
Expedia Group
EXPE
$31.2B
| $174K | 0.01% |
613
-24
| -4% | -$3.04K |
|
|
UNIT
974
Uniti Group
UNIT
$2.63B
| $174K | 0.01% |
9,327
+8,815
| +1,722% | +$170K |
|
|
KSU
975
DELISTED
Kansas City Southern
KSU
| $174K | 0.01% |
2,334
-1,303
| -36% | -$111K |
|
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.