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 | |
|---|---|---|---|---|---|---|
3201
CALL
Helix Energy Solutions
HLX
$1.35B
| $11K | ﹤0.01% |
+128
| New | +$742 |
|
|
PPLI
3202
CALL
People Inc
PPLI
$3.13B
| $11K | ﹤0.01% |
643
+380
| +144% | +$4.4K |
|
3203
International Bancshares
IBOC
$4.83B
| $11K | ﹤0.01% |
456
-1,350
| -75% | -$37K |
|
|
BRSL
3204
PUT
Brightstar Lottery PLC
BRSL
$1.92B
| $11K | ﹤0.01% |
85
+21
| +33% | +$336 |
|
3205
PUT
Jack in the Box
JACK
$308M
| $11K | ﹤0.01% |
22
-49
| -69% | -$3.72K |
|
3206
PUT
Jabil
JBL
$31.7B
| $11K | ﹤0.01% |
128
+97
| +313% | +$2.31K |
|
3207
CALL
KeyCorp
KEY
$24.3B
| $11K | ﹤0.01% |
+305
| New | +$4K |
|
3208
CALL
Lumen
LUMN
$6.38B
| $11K | ﹤0.01% |
636
+273
| +75% | +$7.32K |
|
3209
CALL
Monarch Casino & Resort
MCRI
$2.2B
| $11K | ﹤0.01% |
+20
| New | +$425 |
|
|
CALY
3210
PUT
Callaway Golf Company
CALY
$3.28B
| $11K | ﹤0.01% |
103
-55
| -35% | -$529 |
|
3211
CALL
Nabors Industries
NBR
$1.12B
| $11K | ﹤0.01% |
+3
| New | +$1.47K |
|
3212
CALL
Noodles & Co
NDLS
$88.2M
| $11K | ﹤0.01% |
+2
| New | +$191 |
|
3213
CALL
NetApp
NTAP
$34.2B
| $11K | ﹤0.01% |
932
+277
| +42% | +$8.66K |
|
3214
CALL
NovoCure
NVCR
$1.89B
| $11K | ﹤0.01% |
+135
| New | +$3.23K |
|
3215
Oxford Industries
OXM
$613M
| $11K | ﹤0.01% |
+174
| New | +$12K |
|
3216
PUT
POSCO
PKX
$15.5B
| $11K | ﹤0.01% |
12
-34
| -74% | -$1.28K |
|
3217
Plug Power
PLUG
$2.73B
| $11K | ﹤0.01% |
+5,575
| New | +$12.3K |
|
3218
CALL
Protolabs
PRLB
$1.78B
| $11K | ﹤0.01% |
104
+71
| +215% | +$4.58K |
|
|
RDUS
3219
PUT
DELISTED
Radius Recycling
RDUS
| $11K | ﹤0.01% |
105
+90
| +600% | +$1.44K |
|
|
SEE
3220
PUT
DELISTED
Sealed Air
SEE
| $11K | ﹤0.01% |
26
-26
| -50% | -$1.2K |
|
3221
TD Synnex
SNX
$19.8B
| $11K | ﹤0.01% |
+266
| New | +$12.3K |
|
3222
CALL
Spectrum Brands
SPB
$2.08B
| $11K | ﹤0.01% |
+37
| New | +$3.54K |
|
3223
SPS Commerce
SPSC
$2.51B
| $11K | ﹤0.01% |
+314
| New | +$11.5K |
|
3224
PUT
Truist Financial
TFC
$64.7B
| $11K | ﹤0.01% |
69
-125
| -64% | -$4.7K |
|
|
TGI
3225
PUT
DELISTED
Triumph Group
TGI
| $11K | ﹤0.01% |
29
+25
| +625% | +$1.01K |
|
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.