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 | |
|---|---|---|---|---|---|---|
826
PUT
Oracle
ORCL
$356B
| $371K | 0.02% |
2,838
-42
| -1% | -$2.09K |
|
827
Impinj
PI
$4.04B
| $370K | 0.02% |
8,899
+5,162
| +138% | +$217K |
|
828
CALL
BlackBerry
BB
$5.06B
| $369K | 0.02% |
2,333
+457
| +24% | +$4.3K |
|
|
HTZ
829
CALL
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $369K | 0.02% |
2,455
+1,039
| +73% | +$16.4K |
|
830
LGI Homes
LGIH
$1.31B
| $368K | 0.02% |
+7,592
| New | +$337K |
|
|
NUVA
831
DELISTED
NuVasive, Inc.
NUVA
| $368K | 0.02% |
6,638
+3,993
| +151% | +$264K |
|
832
CALL
CME Group
CME
$91.6B
| $367K | 0.02% |
384
-491
| -56% | -$62K |
|
833
CALL
Cummins
CMI
$91.8B
| $367K | 0.02% |
370
+47
| +15% | +$7.61K |
|
834
CALL
Herbalife
HLF
$1.24B
| $367K | 0.02% |
1,246
-862
| -41% | -$29.5K |
|
835
Lamar Advertising Co
LAMR
$16B
| $367K | 0.02% |
5,363
-10,646
| -67% | -$720K |
|
836
CALL
ArcelorMittal
MT
$50B
| $366K | 0.01% |
1,577
-245
| -13% | -$6.34K |
|
837
LiveRamp
RAMP
$2.29B
| $366K | 0.01% |
+14,861
| New | +$365K |
|
838
D.R. Horton
DHI
$39.2B
| $365K | 0.01% |
+9,154
| New | +$334K |
|
839
CALL
Zions Bancorporation
ZION
$9.98B
| $364K | 0.01% |
725
-185
| -20% | -$8.23K |
|
|
SDRL
840
PUT
DELISTED
Seadrill Limited Common Stock
SDRL
| $364K | 0.01% |
9
-5
| -36% | -$436 |
|
841
Canadian Pacific Kansas City
CP
$81.7B
| $363K | 0.01% |
+10,820
| New | +$344K |
|
842
Wintrust Financial
WTFC
$10.5B
| $363K | 0.01% |
4,640
+2,285
| +97% | +$170K |
|
|
DBVT
843
DBV Technologies
DBVT
$802M
| $361K | 0.01% |
852
+261
| +44% | +$112K |
|
844
O'Reilly Automotive
ORLY
$71.2B
| $361K | 0.01% |
+25,170
| New | +$332K |
|
|
BPL
845
DELISTED
Buckeye Partners, L.P.
BPL
| $361K | 0.01% |
6,345
-19,083
| -75% | -$1.13M |
|
846
Prologis
PLD
$133B
| $360K | 0.01% |
5,680
+1,436
| +34% | +$88.5K |
|
847
PUT
Signet Jewelers
SIG
$3.46B
| $360K | 0.01% |
1,246
+491
| +65% | +$30.2K |
|
|
STZ.B
848
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $359K | 0.01% |
225
-238
| -51% | -$46.9K |
|
849
BGC Group
BGC
$5.51B
| $358K | 0.01% |
38,486
+25,338
| +193% | +$212K |
|
850
CALL
Cboe Global Markets
CBOE
$30.1B
| $358K | 0.01% |
653
+567
| +659% | +$55.8K |
|
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.