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 | |
|---|---|---|---|---|---|---|
|
EIGI
926
DELISTED
Endurance International Group Holdings, Inc.
EIGI
| $318K | 0.01% |
38,894
+26,804
| +222% | +$216K |
|
927
CALL
Altria Group
MO
$120B
| $317K | 0.01% |
2,965
-54
| -2% | -$3.6K |
|
|
TIVO
928
DELISTED
Tivo Inc
TIVO
| $317K | 0.01% |
15,978
+11,076
| +226% | +$207K |
|
929
PUT
Comcast
CMCSA
$80.8B
| $316K | 0.01% |
2,759
-3,074
| -53% | -$121K |
|
930
Brown-Forman Class B
BF.B
$11.8B
| $315K | 0.01% |
9,083
+7,791
| +603% | +$253K |
|
|
BZUN
931
CALL
Baozun
BZUN
$142M
| $313K | 0.01% |
443
-227
| -34% | -$7.18K |
|
932
PUT
Cleveland-Cliffs
CLF
$6.3B
| $313K | 0.01% |
1,872
-36
| -2% | -$269 |
|
933
CALL
Advanced Micro Devices
AMD
$871B
| $311K | 0.01% |
4,161
-9,825
| -70% | -$128K |
|
934
PUT
Merck
MRK
$322B
| $311K | 0.01% |
1,606
-2,473
| -61% | -$150K |
|
935
CALL
Royal Gold
RGLD
$16.9B
| $311K | 0.01% |
433
-163
| -27% | -$14.1K |
|
936
CALL
Freeport-McMoran
FCX
$91.2B
| $310K | 0.01% |
2,544
-1,967
| -44% | -$27.6K |
|
|
HES
937
PUT
DELISTED
Hess
HES
| $310K | 0.01% |
1,298
-1,054
| -45% | -$44.6K |
|
938
CALL
Accenture
ACN
$84.6B
| $309K | 0.01% |
1,090
+139
| +15% | +$18.1K |
|
939
Gogo Inc
GOGO
$515M
| $309K | 0.01% |
26,231
+5,623
| +27% | +$71.7K |
|
|
AXDX
940
DELISTED
Accelerate Diagnostics
AXDX
| $308K | 0.01% |
1,373
-2,125
| -61% | -$522K |
|
941
CALL
AstraZeneca
AZN
$261B
| $308K | 0.01% |
677
-441
| -39% | -$27.9K |
|
942
Hancock Whitney
HWC
$6.06B
| $308K | 0.01% |
+6,361
| New | +$291K |
|
|
NDRM
943
DELISTED
NeuroDerm Ltd. Ordinary Shares
NDRM
| $308K | 0.01% |
+7,928
| New | +$292K |
|
944
CALL
Marriott International
MAR
$95.6B
| $306K | 0.01% |
424
-113
| -21% | -$11.6K |
|
945
CALL
Ferrari
RACE
$63B
| $306K | 0.01% |
474
+350
| +282% | +$37.3K |
|
946
CALL
Abeona Therapeutics
ABEO
$363M
| $305K | 0.01% |
17
+15
| +750% | +$4.03K |
|
947
CALL
Albemarle
ALB
$13.8B
| $305K | 0.01% |
213
+36
| +20% | +$4.28K |
|
948
CALL
NetEase
NTES
$76.8B
| $305K | 0.01% |
3,175
+1,365
| +75% | +$78.4K |
|
949
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$854M
| $305K | 0.01% |
+1,918
| New | +$319K |
|
|
ENV
950
CALL
DELISTED
ENVESTNET, INC.
ENV
| $305K | 0.01% |
702
+489
| +230% | +$20.9K |
|
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.