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 | |
|---|---|---|---|---|---|---|
|
HMSY
1901
DELISTED
HMS Holdings Corp.
HMSY
| $82K | ﹤0.01% |
+4,143
| New | +$77K |
|
|
SINA
1902
PUT
DELISTED
Sina Corp
SINA
| $82K | ﹤0.01% |
708
+327
| +86% | +$33K |
|
|
KEYW
1903
DELISTED
The KEYW Holding Corporation
KEYW
| $82K | ﹤0.01% |
10,791
+4,941
| +84% | +$40.1K |
|
|
CHL
1904
DELISTED
China Mobile Limited
CHL
| $82K | ﹤0.01% |
1,632
-17,334
| -91% | -$923K |
|
1905
Ericsson
ERIC
$30.7B
| $81K | ﹤0.01% |
14,216
-18,071
| -56% | -$112K |
|
|
MOMO
1906
CALL
Hello Group
MOMO
$869M
| $81K | ﹤0.01% |
882
+131
| +17% | +$5.2K |
|
|
NVMI
1907
Nova
NVMI
$13.9B
| $81K | ﹤0.01% |
2,901
-1,264
| -30% | -$30.8K |
|
|
ONIT
1908
CALL
Onity Group
ONIT
$333M
| $81K | ﹤0.01% |
180
+26
| +17% | +$1.13K |
|
|
NAV
1909
DELISTED
Navistar International
NAV
| $81K | ﹤0.01% |
1,846
-8,312
| -82% | -$276K |
|
|
SONC
1910
DELISTED
Sonic Corp
SONC
| $81K | ﹤0.01% |
3,202
-8,869
| -73% | -$216K |
|
|
SHLD
1911
CALL
DELISTED
Sears Holding Corporation
SHLD
| $81K | ﹤0.01% |
2,173
-90
| -4% | -$740 |
|
1912
CALL
Aflac
AFL
$63.9B
| $80K | ﹤0.01% |
444
-38
| -8% | -$1.53K |
|
1913
CALL
Acuity Brands
AYI
$9.88B
| $80K | ﹤0.01% |
188
+91
| +94% | +$17K |
|
1914
PUT
Avis
CAR
$5.63B
| $80K | ﹤0.01% |
803
-671
| -46% | -$22.6K |
|
|
DFS
1915
PUT
DELISTED
Discover Financial Services
DFS
| $80K | ﹤0.01% |
451
+57
| +14% | +$3.46K |
|
1916
CALL
Mohawk Industries
MHK
$6.9B
| $80K | ﹤0.01% |
194
+51
| +36% | +$12.7K |
|
1917
CALL
TransUnion
TRU
$14.8B
| $80K | ﹤0.01% |
179
+148
| +477% | +$6.77K |
|
1918
CALL
Twilio
TWLO
$29.1B
| $80K | ﹤0.01% |
675
-1,327
| -66% | -$39.8K |
|
|
TAST
1919
DELISTED
Carrols Restaurant Group, Inc.
TAST
| $80K | ﹤0.01% |
7,348
+2,555
| +53% | +$29.7K |
|
|
PCOM
1920
DELISTED
Points.com Inc. Common Shares
PCOM
| $80K | ﹤0.01% |
+7,088
| New | +$64.4K |
|
|
GOOS
1921
Canada Goose Holdings
GOOS
$868M
| $79K | ﹤0.01% |
3,868
-17,506
| -82% | -$333K |
|
1922
Insight Enterprises
NSIT
$3.55B
| $79K | ﹤0.01% |
+1,733
| New | +$71.3K |
|
1923
Penumbra
PEN
$12.5B
| $79K | ﹤0.01% |
+884
| New | +$76.2K |
|
1924
CALL
Polaris
PII
$4.15B
| $79K | ﹤0.01% |
163
+34
| +26% | +$3.22K |
|
1925
PUT
Vornado Realty Trust
VNO
$7.47B
| $79K | ﹤0.01% |
293
-121
| -29% | -$9.23K |
|
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.