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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
MDCO
976
PUT
DELISTED
Medicines Co
MDCO
| $289K | 0.01% |
358
-343
| -49% | -$15.3K |
|
|
ANDX
977
DELISTED
Andeavor Logistics LP
ANDX
| $289K | 0.01% |
5,597
-982
| -15% | -$51.5K |
|
978
CALL
Avis
CAR
$5.62B
| $288K | 0.01% |
732
+479
| +189% | +$12.3K |
|
979
abrdn Physical Gold Shares ETF
SGOL
$6.91B
| $288K | 0.01% |
+23,970
| New | +$293K |
|
980
SPS Commerce
SPSC
$2.17B
| $287K | 0.01% |
9,006
+5,212
| +137% | +$155K |
|
|
PRAH
981
DELISTED
PRA Health Sciences, Inc.
PRAH
| $287K | 0.01% |
+3,831
| New | +$266K |
|
982
PUT
W.W. Grainger
GWW
$64.6B
| $286K | 0.01% |
194
-52
| -21% | -$9.81K |
|
983
PUT
Lands' End
LE
$358M
| $286K | 0.01% |
310
-215
| -41% | -$4.09K |
|
|
B
984
Barrick Mining
B
$62.3B
| $285K | 0.01% |
+17,972
| New | +$308K |
|
985
PUT
PayPal
PYPL
$49.4B
| $285K | 0.01% |
5,208
+3,377
| +184% | +$166K |
|
986
CALL
Cencora
COR
$59.4B
| $284K | 0.01% |
364
-82
| -18% | -$7.3K |
|
987
Sensata Technologies
ST
$6.63B
| $283K | 0.01% |
6,645
-30,633
| -82% | -$1.26M |
|
|
KANG
988
PUT
DELISTED
iKang Healthcare Group, Inc.
KANG
| $283K | 0.01% |
882
+270
| +44% | +$3.92K |
|
989
Comtech Telecommunications
CMTL
$52.7M
| $282K | 0.01% |
14,916
+8
| +0.1% | +$124 |
|
|
SPN
990
DELISTED
Superior Energy Services, Inc.
SPN
| $282K | 0.01% |
2,713
-1,541
| -36% | -$179K |
|
991
Rockwell Automation
ROK
$51.3B
| $281K | 0.01% |
1,735
+1,633
| +1,601% | +$258K |
|
|
BWLD
992
PUT
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $281K | 0.01% |
209
+43
| +26% | +$6.42K |
|
|
EMBJ
993
Embraer S.A. ADS
EMBJ
$11.7B
| $280K | 0.01% |
+15,391
| New | +$303K |
|
994
CALL
Intel
INTC
$504B
| $280K | 0.01% |
5,001
+1,889
| +61% | +$67.6K |
|
995
PUT
Jack in the Box
JACK
$263M
| $279K | 0.01% |
189
+98
| +108% | +$10.1K |
|
996
Xylem
XYL
$27.8B
| $279K | 0.01% |
5,048
-6,797
| -57% | -$354K |
|
|
NSR
997
DELISTED
Neustar Inc
NSR
| $279K | 0.01% |
8,374
-20,656
| -71% | -$686K |
|
|
JUNO
998
CALL
DELISTED
Juno Therapeutics, Inc.
JUNO
| $277K | 0.01% |
525
-122
| -19% | -$3.01K |
|
|
HSNI
999
DELISTED
HSN, Inc.
HSNI
| $277K | 0.01% |
+8,714
| New | +$301K |
|
1000
ATI
ATI
$27.3B
| $276K | 0.01% |
16,276
+10,420
| +178% | +$175K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.