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 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DF
2076
DELISTED
Dean Foods Company
DF
| $64K | ﹤0.01% |
5,941
+3,858
| +185% | +$49.7K |
|
|
COL
2077
PUT
DELISTED
Rockwell Collins
COL
| $64K | ﹤0.01% |
863
+713
| +475% | +$86.6K |
|
|
PF
2078
PUT
DELISTED
Pinnacle Foods, Inc.
PF
| $64K | ﹤0.01% |
454
-157
| -26% | -$9.31K |
|
|
AVXS
2079
CALL
DELISTED
AveXis, Inc. Common Stock
AVXS
| $64K | ﹤0.01% |
175
-192
| -52% | -$17.3K |
|
|
TIME
2080
PUT
DELISTED
Time Inc.
TIME
| $64K | ﹤0.01% |
518
-29
| -5% | -$389 |
|
|
ALR
2081
CALL
DELISTED
Alere Inc
ALR
| $64K | ﹤0.01% |
791
+73
| +10% | +$3.65K |
|
2082
PUT
Analog Devices
ADI
$181B
| $63K | ﹤0.01% |
567
-799
| -58% | -$64.4K |
|
|
BPMC
2083
CALL
DELISTED
Blueprint Medicines
BPMC
| $63K | ﹤0.01% |
30
+1
| +3% | +$53 |
|
2084
CALL
Coca-Cola Europacific Partners
CCEP
$46.5B
| $63K | ﹤0.01% |
154
-577
| -79% | -$24.5K |
|
2085
Citizens
CIA
$245M
| $63K | ﹤0.01% |
+8,623
| New | +$66.5K |
|
2086
Genesco
GCO
$396M
| $63K | ﹤0.01% |
2,371
+852
| +56% | +$24.1K |
|
2087
CALL
Group 1 Automotive
GPI
$3.94B
| $63K | ﹤0.01% |
+83
| New | +$5.1K |
|
2088
CALL
Hasbro
HAS
$12.6B
| $63K | ﹤0.01% |
337
-134
| -28% | -$13.6K |
|
|
IMOS
2089
ChipMOS TECHNOLOGIES
IMOS
$1.92B
| $63K | ﹤0.01% |
2,786
+1,691
| +154% | +$37.5K |
|
2090
CALL
Cheniere Energy
LNG
$56.5B
| $63K | ﹤0.01% |
751
+80
| +12% | +$3.54K |
|
2091
Ribbon Communications
RBBN
$354M
| $63K | ﹤0.01% |
8,317
+7,224
| +661% | +$51.7K |
|
2092
CALL
Regenxbio
RGNX
$623M
| $63K | ﹤0.01% |
60
+37
| +161% | +$833 |
|
2093
CALL
Rockwell Automation
ROK
$51.4B
| $63K | ﹤0.01% |
47
-19
| -29% | -$3.16K |
|
2094
Red Rock Resorts
RRR
$3.74B
| $63K | ﹤0.01% |
+2,761
| New | +$63.8K |
|
2095
Scansource
SCSC
$1.12B
| $63K | ﹤0.01% |
+1,460
| New | +$57.4K |
|
2096
CALL
T-Mobile US
TMUS
$193B
| $63K | ﹤0.01% |
1,207
-197
| -14% | -$12.4K |
|
2097
VirnetX Holding Corp
VHC
$52.3M
| $63K | ﹤0.01% |
814
+438
| +116% | +$34.4K |
|
|
WCN
2098
CALL
Waste Connections
WCN
$42.8B
| $63K | ﹤0.01% |
267
+107
| +67% | +$7.07K |
|
2099
ProShares UltraShort Silver
ZSL
$92.7M
| $63K | ﹤0.01% |
12
+9
| +300% | +$46.9K |
|
|
BNFT
2100
CALL
DELISTED
Benefitfocus, Inc.
BNFT
| $63K | ﹤0.01% |
269
-258
| -49% | -$8.26K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.