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 | |
|---|---|---|---|---|---|---|
276
Southwest Airlines
LUV
$21.9B
| $778K | 0.06% |
18,083
+4,962
| +38% | +$220K |
|
277
PUT
Deere & Co
DE
$165B
| $771K | 0.06% |
2,512
+1,212
| +93% | +$93.8K |
|
|
ESRX
278
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $769K | 0.06% |
482
-868
| -64% | -$74.3K |
|
279
PUT
Transocean
RIG
$5.89B
| $765K | 0.06% |
1,107
-2,004
| -64% | -$28.9K |
|
|
VMW
280
PUT
DELISTED
VMware, Inc
VMW
| $765K | 0.06% |
578
+78
| +16% | +$4.85K |
|
|
CST
281
DELISTED
CST Brands, Inc.
CST
| $765K | 0.06% |
19,555
+15,863
| +430% | +$581K |
|
|
OVTI
282
DELISTED
OMNIVISION TECHNOLOGIES INC
OVTI
| $759K | 0.06% |
26,171
-34,622
| -57% | -$995K |
|
283
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $758K | 0.06% |
272
-295
| -52% | -$160K |
|
284
SLB Ltd
SLB
$70.6B
| $748K | 0.06% |
10,737
+7,580
| +240% | +$568K |
|
285
Equinix
EQIX
$102B
| $746K | 0.06% |
+2,467
| New | +$721K |
|
286
CALL
Palo Alto Networks
PANW
$265B
| $746K | 0.06% |
5,790
-90
| -2% | -$2.6K |
|
287
Norfolk Southern
NSC
$78.3B
| $745K | 0.06% |
+8,809
| New | +$754K |
|
288
Deutsche Bank
DB
$65.3B
| $743K | 0.06% |
34,460
-20,430
| -37% | -$486K |
|
|
MON
289
CALL
DELISTED
Monsanto Co
MON
| $739K | 0.06% |
1,450
+300
| +26% | +$28.2K |
|
290
PUT
APA Corp
APA
$12.9B
| $737K | 0.06% |
940
-483
| -34% | -$22.5K |
|
|
ESPR
291
PUT
DELISTED
Esperion Therapeutics
ESPR
| $736K | 0.06% |
118
-99
| -46% | -$2.5K |
|
|
CXO
292
DELISTED
CONCHO RESOURCES INC.
CXO
| $735K | 0.06% |
7,917
+5,470
| +224% | +$585K |
|
293
Corning
GLW
$134B
| $731K | 0.06% |
+39,990
| New | +$725K |
|
|
ICPT
294
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $731K | 0.06% |
4,899
+1,551
| +46% | +$263K |
|
295
CALL
Chevron
CVX
$387B
| $730K | 0.06% |
2,752
-33
| -1% | -$2.98K |
|
296
CALL
Trip.com Group
TCOM
$27.1B
| $730K | 0.06% |
1,584
-434
| -22% | -$19.8K |
|
297
CALL
CVS Health
CVS
$136B
| $727K | 0.06% |
1,984
-470
| -19% | -$46K |
|
298
The Mosaic Company
MOS
$7.08B
| $726K | 0.06% |
26,342
+4,391
| +20% | +$140K |
|
299
PUT
Skyworks Solutions
SWKS
$9.1B
| $716K | 0.06% |
1,105
-173
| -14% | -$13.9K |
|
300
Nokia
NOK
$54.3B
| $715K | 0.06% |
101,913
+47,551
| +87% | +$339K |
|
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.