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 | |
|---|---|---|---|---|---|---|
|
QIHU
26
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $7.34M | 0.57% |
100,846
+59,633
| +145% | +$3.76M |
|
|
UCD
27
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.27M | 0.57% |
12,433
-663
| -5% | -$22.8K |
|
28
GE Aerospace
GE
$356B
| $7.26M | 0.57% |
48,663
+36,762
| +309% | +$5.22M |
|
|
TWTR
29
DELISTED
Twitter, Inc.
TWTR
| $7.03M | 0.55% |
303,623
+235,120
| +343% | +$6.27M |
|
30
Goldman Sachs
GS
$324B
| $7M | 0.55% |
38,823
+8,716
| +29% | +$1.62M |
|
31
Pfizer
PFE
$142B
| $6.9M | 0.54% |
225,434
+221,003
| +4,988% | +$6.95M |
|
32
Wynn Resorts
WYNN
$9.79B
| $6.6M | 0.52% |
95,430
+54,939
| +136% | +$3.67M |
|
33
Citigroup
C
$223B
| $6.47M | 0.51% |
124,994
-39,191
| -24% | -$2.08M |
|
34
CALL
iShares S&P 100 ETF
OEF
$20.1B
| $5.64M | 0.44% |
25,408
-18,061
| -42% | -$1.66M |
|
|
35
PUT
Chipotle Mexican Grill
CMG
$42.1B
| $5.53M | 0.43% |
74,000
+3,600
| +5% | +$44K |
|
36
Alphabet (Google) Class A
GOOGL
$4.24T
| $5.52M | 0.43% |
+142,000
| New | +$5.26M |
|
37
American International
AIG
$41.9B
| $5.51M | 0.43% |
88,969
-224
| -0.3% | -$13.7K |
|
38
Philip Morris
PM
$298B
| $5.41M | 0.42% |
+61,525
| New | +$5.34M |
|
|
TWX
39
DELISTED
Time Warner Inc
TWX
| $5.35M | 0.42% |
82,759
+70,565
| +579% | +$4.93M |
|
40
McDonald's
MCD
$187B
| $5.12M | 0.4% |
+43,332
| New | +$4.85M |
|
|
CELG
41
DELISTED
Celgene Corp
CELG
| $5.02M | 0.39% |
41,943
-9,706
| -19% | -$1.12M |
|
|
AGN
42
DELISTED
Allergan plc
AGN
| $4.79M | 0.38% |
+15,344
| New | +$4.57M |
|
|
PCP
43
DELISTED
PRECISION CASTPARTS CORP
PCP
| $4.66M | 0.37% |
20,090
+4,414
| +28% | +$1.02M |
|
44
iShares China Large-Cap ETF
FXI
$4.29B
| $4.59M | 0.36% |
130,018
+120,737
| +1,301% | +$4.54M |
|
|
UCD
45
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $4.47M | 0.35% |
9,885
-298
| -3% | -$10.2K |
|
46
PUT
Alibaba
BABA
$278B
| $4.36M | 0.34% |
6,792
-5,573
| -45% | -$437K |
|
47
Boeing
BA
$162B
| $4.25M | 0.33% |
29,422
+26,662
| +966% | +$3.84M |
|
48
Berkshire Hathaway Class B
BRK.B
$1.06T
| $4.13M | 0.32% |
31,286
-14,547
| -32% | -$1.95M |
|
|
CELG
49
CALL
DELISTED
Celgene Corp
CELG
| $4.03M | 0.32% |
2,765
-1,242
| -31% | -$144K |
|
50
Visa
V
$675B
| $4.02M | 0.31% |
51,812
+20,441
| +65% | +$1.58M |
|
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.