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 | |
|---|---|---|---|---|---|---|
926
EPAM Systems
EPAM
$4.69B
| $185K | 0.01% |
2,365
-2,128
| -47% | -$166K |
|
927
GATX Corp
GATX
$6.55B
| $185K | 0.01% |
+4,369
| New | +$197K |
|
928
CALL
Kroger
KR
$34.8B
| $185K | 0.01% |
702
+428
| +156% | +$16.6K |
|
929
Lesaka Technologies
LSAK
$388M
| $185K | 0.01% |
13,712
+13,681
| +44,132% | +$214K |
|
930
PUT
McDonald's
MCD
$188B
| $185K | 0.01% |
1,566
+150
| +11% | +$16.8K |
|
931
PUT
Williams-Sonoma
WSM
$26.7B
| $185K | 0.01% |
396
-394
| -50% | -$13.5K |
|
|
PTR
932
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $185K | 0.01% |
2,821
+1,096
| +64% | +$80.8K |
|
933
ProShares Ultra Silver
AGQ
$1.16B
| $183K | 0.01% |
6,774
-4,090
| -38% | -$128K |
|
934
CALL
Humana
HUM
$46.7B
| $183K | 0.01% |
269
-82
| -23% | -$14.4K |
|
935
PUT
Verizon
VZ
$194B
| $183K | 0.01% |
378
-172
| -31% | -$7.81K |
|
|
WCG
936
DELISTED
Wellcare Health Plans, Inc.
WCG
| $183K | 0.01% |
2,350
-1,108
| -32% | -$91.8K |
|
937
Hexcel
HXL
$8.32B
| $182K | 0.01% |
3,936
-621
| -14% | -$28.7K |
|
938
PUT
PRA Group
PRAA
$648M
| $182K | 0.01% |
112
-4
| -3% | -$179 |
|
939
CALL
Sony
SONY
$123B
| $182K | 0.01% |
2,150
-1,135
| -35% | -$6.01K |
|
940
PUT
Electronic Arts
EA
$52.4B
| $181K | 0.01% |
500
-247
| -33% | -$17.3K |
|
|
INVN
941
PUT
DELISTED
Invensense Inc
INVN
| $181K | 0.01% |
941
+152
| +19% | +$1.68K |
|
|
BRCM
942
PUT
DELISTED
BROADCOM CORP CL-A
BRCM
| $181K | 0.01% |
1,546
+855
| +124% | +$46K |
|
|
VNR
943
PUT
DELISTED
Vanguard Natural Resources, LLC
VNR
| $181K | 0.01% |
292
+200
| +217% | +$1.22K |
|
944
PUT
Charter Communications
CHTR
$15.2B
| $180K | 0.01% |
182
-38
| -17% | -$7.04K |
|
945
Texas Instruments
TXN
$255B
| $180K | 0.01% |
+3,289
| New | +$184K |
|
|
HCR
946
PUT
DELISTED
Hi-Crush Inc. Common Stock
HCR
| $180K | 0.01% |
63
-9
| -13% | -$61 |
|
|
ONCE
947
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $180K | 0.01% |
+3,990
| New | +$209K |
|
|
DSKY
948
DELISTED
IDREAMSKY TECHNOLOGY LTD ADS REPTSG SHS CL A
DSKY
| $180K | 0.01% |
13,469
+12,782
| +1,861% | +$156K |
|
949
PUT
Tapestry
TPR
$28.8B
| $179K | 0.01% |
535
+45
| +9% | +$1.4K |
|
|
NILE
950
DELISTED
Blue Nile, Inc.
NILE
| $179K | 0.01% |
+4,846
| New | +$170K |
|
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.