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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ANSS
4101
PUT
DELISTED
Ansys
ANSS
| $4K | ﹤0.01% |
+43
| New | +$3.95K |
|
4102
American Public Education
APEI
$910M
| $4K | ﹤0.01% |
200
-444
| -69% | -$10.6K |
|
4103
CALL
Aramark
ARMK
$15.1B
| $4K | ﹤0.01% |
+22
| New | +$502 |
|
4104
CALL
Arrow Electronics
ARW
$10.5B
| $4K | ﹤0.01% |
23
+11
| +92% | +$611 |
|
4105
PUT
AvalonBay Communities
AVB
$27.2B
| $4K | ﹤0.01% |
15
+7
| +88% | +$1.19K |
|
4106
Avient
AVNT
$3.48B
| $4K | ﹤0.01% |
137
-104
| -43% | -$3.51K |
|
4107
Aware
AWRE
$24.5M
| $4K | ﹤0.01% |
1,400
+1,367
| +4,142% | +$4.66K |
|
4108
AZZ Inc
AZZ
$4.41B
| $4K | ﹤0.01% |
+90
| New | +$4.62K |
|
|
BCLI
4109
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $4K | ﹤0.01% |
+119
| New | +$5.59K |
|
4110
CALL
Bunge Global
BG
$23.1B
| $4K | ﹤0.01% |
84
+42
| +100% | +$3.25K |
|
4111
CALL
Buckle
BKE
$2.32B
| $4K | ﹤0.01% |
+19
| New | +$801 |
|
4112
PUT
Blackbaud
BLKB
$1.66B
| $4K | ﹤0.01% |
+14
| New | +$820 |
|
4113
PUT
Bloomin' Brands
BLMN
$742M
| $4K | ﹤0.01% |
10
-91
| -90% | -$1.94K |
|
4114
PUT
Bank of Montreal
BMO
$125B
| $4K | ﹤0.01% |
10
-243
| -96% | -$13.3K |
|
4115
CALL
Box
BOX
$4.29B
| $4K | ﹤0.01% |
31
-131
| -81% | -$1.95K |
|
4116
CALL
British American Tobacco
BTI
$135B
| $4K | ﹤0.01% |
50
+34
| +213% | +$1.89K |
|
4117
PUT
Crown Castle
CCI
$33.7B
| $4K | ﹤0.01% |
36
+15
| +71% | +$1.22K |
|
4118
PUT
CDW
CDW
$18.2B
| $4K | ﹤0.01% |
+78
| New | +$2.95K |
|
4119
PUT
Cullen/Frost Bankers
CFR
$10.4B
| $4K | ﹤0.01% |
40
+27
| +208% | +$1.84K |
|
4120
Compugen
CGEN
$217M
| $4K | ﹤0.01% |
921
-1,275
| -58% | -$7.43K |
|
4121
CALL
Core Laboratories
CLB
$509M
| $4K | ﹤0.01% |
135
+31
| +30% | +$3.37K |
|
|
CMA
4122
CALL
DELISTED
Comerica
CMA
| $4K | ﹤0.01% |
93
+83
| +830% | +$3.78K |
|
4123
PUT
Comtech Telecommunications
CMTL
$50M
| $4K | ﹤0.01% |
+92
| New | +$2.52K |
|
4124
CALL
CenterPoint Energy
CNP
$29.5B
| $4K | ﹤0.01% |
151
+43
| +40% | +$804 |
|
4125
CALL
CRH
CRH
$68.9B
| $4K | ﹤0.01% |
22
-24
| -52% | -$695 |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.