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 | |
|---|---|---|---|---|---|---|
651
Stanley Black & Decker
SWK
$13.6B
| $297K | 0.02% |
2,789
-420
| -13% | -$44.3K |
|
|
CLR
652
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $297K | 0.02% |
297
-134
| -31% | -$4.28K |
|
653
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.57B
| $293K | 0.02% |
14,176
-30,424
| -68% | -$642K |
|
654
CALL
Boeing
BA
$165B
| $291K | 0.02% |
1,314
-160
| -11% | -$23K |
|
655
PENN Entertainment
PENN
$2.71B
| $291K | 0.02% |
18,175
+16,075
| +765% | +$271K |
|
|
LXK
656
DELISTED
Lexmark Intl Inc
LXK
| $291K | 0.02% |
+8,989
| New | +$294K |
|
657
Zillow
ZG
$6.76B
| $290K | 0.02% |
+11,134
| New | +$317K |
|
658
Trinity Industries
TRN
$2.92B
| $289K | 0.02% |
+16,725
| New | +$310K |
|
|
SINA
659
CALL
DELISTED
Sina Corp
SINA
| $289K | 0.02% |
488
-213
| -30% | -$10.2K |
|
|
QIHU
660
PUT
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $289K | 0.02% |
1,979
+999
| +102% | +$63K |
|
661
CALL
Advance Auto Parts
AAP
$3.22B
| $288K | 0.02% |
260
+146
| +128% | +$25.4K |
|
662
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $288K | 0.02% |
365
+75
| +26% | +$2.64K |
|
663
PUT
General Motors
GM
$73B
| $287K | 0.02% |
1,846
| – | – |
|
664
PUT
3D Systems Corp
DDD
$423M
| $285K | 0.02% |
713
+96
| +16% | +$991 |
|
665
Sturm, Ruger & Co
RGR
$607M
| $285K | 0.02% |
+4,784
| New | +$269K |
|
|
MBLY
666
CALL
DELISTED
Mobileye N.V.
MBLY
| $285K | 0.02% |
1,287
-223
| -15% | -$9.97K |
|
|
BTU
667
PUT
DELISTED
PEABODY ENERGY CORP COM STK NEW (DE)
BTU
| $285K | 0.02% |
552
+520
| +1,625% | +$7.49K |
|
668
Ryder
R
$10.4B
| $284K | 0.02% |
+5,000
| New | +$330K |
|
669
PUT
Delta Air Lines
DAL
$53.9B
| $283K | 0.02% |
1,698
-345
| -17% | -$17.1K |
|
|
CMCSK
670
PUT
DELISTED
COMCAST CORP SPL A (NEW)
CMCSK
| $283K | 0.02% |
1,380
-1,042
| -43% | -$214K |
|
671
CALL
Smith & Wesson
SWBI
$645M
| $282K | 0.02% |
852
+674
| +379% | +$9.92K |
|
|
PSXP
672
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $282K | 0.02% |
4,600
+3,724
| +425% | +$216K |
|
673
AMN Healthcare
AMN
$1.28B
| $280K | 0.02% |
9,029
+4,906
| +119% | +$145K |
|
674
DaVita
DVA
$15B
| $280K | 0.02% |
+4,021
| New | +$295K |
|
|
HES
675
PUT
DELISTED
Hess
HES
| $279K | 0.02% |
922
+184
| +25% | +$10.4K |
|
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.