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 | |
|---|---|---|---|---|---|---|
551
CALL
JPMorgan Chase
JPM
$930B
| $375K | 0.03% |
3,282
+1,201
| +58% | +$78.2K |
|
|
HOLX
552
CALL
DELISTED
Hologic
HOLX
| $374K | 0.03% |
298
-55
| -16% | -$2.14K |
|
553
PUT
Merck
MRK
$322B
| $374K | 0.03% |
1,588
-491
| -24% | -$24.8K |
|
554
CALL
iShares MSCI Australia ETF
EWA
$1.33B
| $373K | 0.03% |
6,842
+195
| +3% | +$3.69K |
|
555
PUT
ProShares UltraShort Industrials
SIJ
$5.78M
| $373K | 0.03% |
67
-33
| -33% | -$21.3K |
|
|
UWC
556
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $372K | 0.03% |
709
-456
| -39% | -$239K |
|
557
KKR & Co
KKR
$86.2B
| $371K | 0.03% |
23,849
+17,091
| +253% | +$292K |
|
558
CALL
IBM
IBM
$195B
| $370K | 0.03% |
2,737
+706
| +35% | +$94.8K |
|
559
CALL
Molson Coors Class B
TAP
$7.51B
| $370K | 0.03% |
745
-1,225
| -62% | -$110K |
|
560
Travelers Companies
TRV
$78.5B
| $370K | 0.03% |
3,284
-3,862
| -54% | -$429K |
|
561
MakeMyTrip
MMYT
$4.67B
| $368K | 0.03% |
21,493
+12,833
| +148% | +$212K |
|
562
Photronics
PLAB
$1.82B
| $367K | 0.03% |
+29,488
| New | +$317K |
|
|
PTLA
563
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $365K | 0.03% |
+7,098
| New | +$344K |
|
564
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.37B
| $364K | 0.03% |
+13,037
| New | +$453K |
|
565
CALL
Under Armour
UAA
$2.87B
| $363K | 0.03% |
1,889
+22
| +1% | +$996 |
|
566
Papa John's
PZZA
$999M
| $361K | 0.03% |
6,471
+4,433
| +218% | +$274K |
|
|
DNKN
567
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $358K | 0.03% |
8,426
+3,006
| +55% | +$126K |
|
568
World Acceptance Corp
WRLD
$840M
| $356K | 0.03% |
9,597
+8,988
| +1,476% | +$333K |
|
569
PUT
BP
BP
$113B
| $353K | 0.03% |
890
-989
| -53% | -$28.1K |
|
570
Accenture
ACN
$84.9B
| $352K | 0.03% |
+3,375
| New | +$356K |
|
571
Direxion Daily Technology Bull 3x ETF
TECL
$5.39B
| $352K | 0.03% |
+96,720
| New | +$358K |
|
572
Emerson Electric
EMR
$81.2B
| $349K | 0.03% |
7,310
-17,775
| -71% | -$846K |
|
573
Consolidated Edison
ED
$41.6B
| $348K | 0.03% |
5,415
-745
| -12% | -$47.9K |
|
574
PUT
F5
FFIV
$21.9B
| $348K | 0.03% |
253
-261
| -51% | -$28.2K |
|
575
VanEck Junior Gold Miners ETF
GDXJ
$7.05B
| $348K | 0.03% |
+18,125
| New | +$365K |
|
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.