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 | |
|---|---|---|---|---|---|---|
1226
PUT
Hewlett Packard
HPE
$63.2B
| $119K | 0.01% |
+1,832
| New | +$15.3K |
|
1227
PUT
NetApp
NTAP
$32.9B
| $119K | 0.01% |
205
+56
| +38% | +$1.75K |
|
1228
Stratasys
SSYS
$697M
| $119K | 0.01% |
5,074
+4,921
| +3,216% | +$130K |
|
1229
PUT
AT&T
T
$165B
| $119K | 0.01% |
820
-1,125
| -58% | -$28.5K |
|
1230
CALL
Altisource Portfolio Solutions
ASPS
$65.4M
| $118K | 0.01% |
22
+18
| +450% | +$4K |
|
1231
A10 Networks
ATEN
$2.47B
| $118K | 0.01% |
17,996
-1,075
| -6% | -$7.45K |
|
1232
National Grid
NGG
$82.7B
| $118K | 0.01% |
1,768
+260
| +17% | +$17.6K |
|
|
MDSO
1233
DELISTED
Medidata Solutions, Inc.
MDSO
| $118K | 0.01% |
2,410
+476
| +25% | +$20.9K |
|
1234
AB InBev
BUD
$158B
| $117K | 0.01% |
941
-8,140
| -90% | -$985K |
|
1235
CALL
Capital One
COF
$124B
| $117K | 0.01% |
262
-92
| -26% | -$7.05K |
|
|
LL
1236
CALL
DELISTED
LL Flooring Holdings, Inc.
LL
| $117K | 0.01% |
1,048
+402
| +62% | +$6.21K |
|
|
ABB
1237
DELISTED
ABB Ltd
ABB
| $117K | 0.01% |
6,628
-3,422
| -34% | -$63K |
|
|
CRC
1238
PUT
DELISTED
California Resources Corporation
CRC
| $117K | 0.01% |
24
+9
| +60% | +$324 |
|
1239
Aecom
ACM
$9.07B
| $116K | 0.01% |
3,874
+440
| +13% | +$13.2K |
|
1240
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $116K | 0.01% |
1,677
+1,418
| +547% | +$60.3K |
|
1241
PUT
Toll Brothers
TOL
$14B
| $116K | 0.01% |
390
+360
| +1,200% | +$12.8K |
|
1242
PUT
Alnylam Pharmaceuticals
ALNY
$36.3B
| $115K | 0.01% |
72
-1
| -1% | -$93 |
|
1243
PUT
Best Buy
BBY
$18B
| $115K | 0.01% |
395
-375
| -49% | -$12.4K |
|
1244
Element Solutions
ESI
$9.12B
| $115K | 0.01% |
9,008
-52,771
| -85% | -$642K |
|
1245
Dr. Reddy's Laboratories
RDY
$9.82B
| $115K | 0.01% |
12,525
-1,000
| -7% | -$11K |
|
1246
PUT
Tenet Healthcare
THC
$20.1B
| $115K | 0.01% |
152
-1
| -0.7% | -$33 |
|
1247
Vanguard Consumer Staples ETF
VDC
$7.86B
| $115K | 0.01% |
892
+21
| +2% | +$2.68K |
|
|
AUY
1248
PUT
DELISTED
Yamana Gold, Inc.
AUY
| $115K | 0.01% |
337
+215
| +176% | +$448 |
|
|
TFCF
1249
PUT
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $115K | 0.01% |
1,737
-210
| -11% | -$6.17K |
|
|
ANDV
1250
PUT
DELISTED
Andeavor
ANDV
| $115K | 0.01% |
731
-817
| -53% | -$88.1K |
|
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.