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 | |
|---|---|---|---|---|---|---|
|
STKL
901
DELISTED
SunOpta
STKL
| $194K | 0.02% |
28,411
+20,093
| +242% | +$124K |
|
902
CALL
CF Industries
CF
$19.2B
| $193K | 0.02% |
1,391
+75
| +6% | +$3.54K |
|
903
Five Below
FIVE
$11.2B
| $193K | 0.02% |
6,022
-6,577
| -52% | -$211K |
|
904
iShares US Transportation ETF
IYT
$2.33B
| $193K | 0.02% |
5,756
+1,428
| +33% | +$51.2K |
|
|
ASNA
905
DELISTED
Ascena Retail Group, Inc.
ASNA
| $193K | 0.02% |
+982
| New | +$232K |
|
|
JNPR
906
DELISTED
Juniper Networks
JNPR
| $192K | 0.02% |
+6,986
| New | +$207K |
|
907
CALL
Precigen
PGEN
$1.93B
| $192K | 0.02% |
404
+46
| +13% | +$1.55K |
|
908
PUT
VirnetX Holding Corp
VHC
$52.3M
| $192K | 0.02% |
18
| – | – |
|
909
Voya Financial
VOYA
$8.94B
| $192K | 0.02% |
5,209
+5,149
| +8,582% | +$204K |
|
|
IRBT
910
DELISTED
iRobot
IRBT
| $191K | 0.02% |
5,423
+3,129
| +136% | +$101K |
|
911
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $190K | 0.01% |
3,734
-428
| -10% | -$17.6K |
|
912
Boston Beer
SAM
$1.88B
| $190K | 0.01% |
942
+275
| +41% | +$60.3K |
|
913
PUT
MPLX
MPLX
$59.5B
| $189K | 0.01% |
236
+208
| +743% | +$7.85K |
|
914
PUT
Targa Resources
TRGP
$60.4B
| $189K | 0.01% |
159
+58
| +57% | +$2.57K |
|
915
PUT
CNX Resources
CNX
$4.85B
| $188K | 0.01% |
834
-359
| -30% | -$2.54K |
|
916
CALL
Union Pacific
UNP
$182B
| $188K | 0.01% |
1,377
-234
| -15% | -$20.1K |
|
917
Vanguard Total Stock Market ETF
VTI
$654B
| $188K | 0.01% |
+1,812
| New | +$191K |
|
|
BOJA
918
DELISTED
Bojangles', Inc. Common Stock
BOJA
| $188K | 0.01% |
11,860
+8,783
| +285% | +$146K |
|
|
MON
919
PUT
DELISTED
Monsanto Co
MON
| $188K | 0.01% |
855
-458
| -35% | -$43K |
|
920
PUT
Costco
COST
$415B
| $187K | 0.01% |
880
+149
| +20% | +$23.5K |
|
|
GNC
921
PUT
DELISTED
GNC Holdings, Inc.
GNC
| $187K | 0.01% |
286
+121
| +73% | +$4.08K |
|
|
UPL
922
PUT
DELISTED
Ultra Petroleum Corp. Common Stock
UPL
| $187K | 0.01% |
165
+133
| +416% | +$619 |
|
|
ICON
923
PUT
DELISTED
Iconix Brand Group, Inc.
ICON
| $187K | 0.01% |
60
+34
| +131% | +$3.48K |
|
|
ARIA
924
CALL
DELISTED
Ariad Pharmaceuticals Inc
ARIA
| $187K | 0.01% |
2,304
+1,281
| +125% | +$8.41K |
|
|
PBY
925
CALL
DELISTED
PEP BOYS MANNY MOE& JACK
PBY
| $187K | 0.01% |
540
+528
| +4,400% | +$7.88K |
|
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.