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 | |
|---|---|---|---|---|---|---|
2876
Diodes
DIOD
$4B
| $27K | ﹤0.01% |
+914
| New | +$24.6K |
|
|
FARO
2877
DELISTED
Faro Technologies
FARO
| $27K | ﹤0.01% |
716
+375
| +110% | +$13.6K |
|
2878
PUT
FirstEnergy
FE
$28.9B
| $27K | ﹤0.01% |
298
-173
| -37% | -$5.45K |
|
2879
CALL
Gray Television
GTN
$407M
| $27K | ﹤0.01% |
270
-125
| -32% | -$1.79K |
|
2880
CALL
Herc Holdings
HRI
$5.43B
| $27K | ﹤0.01% |
60
-112
| -65% | -$4.86K |
|
2881
CALL
Invesco
IVZ
$13.3B
| $27K | ﹤0.01% |
288
-587
| -67% | -$20.1K |
|
2882
PUT
KB Home
KBH
$3.48B
| $27K | ﹤0.01% |
948
+122
| +15% | +$2.75K |
|
|
LITB
2883
PUT
LightInTheBox
LITB
$59M
| $27K | ﹤0.01% |
+18
| New | +$294 |
|
2884
PUT
ServiceNow
NOW
$102B
| $27K | ﹤0.01% |
2,705
+575
| +27% | +$12.8K |
|
2885
CALL
Realty Income
O
$61.2B
| $27K | ﹤0.01% |
202
+140
| +226% | +$7.78K |
|
2886
PUT
Oneok
OKE
$58.7B
| $27K | ﹤0.01% |
454
+412
| +981% | +$22.3K |
|
2887
CALL
Pan American Silver
PAAS
$18.6B
| $27K | ﹤0.01% |
321
-368
| -53% | -$6.34K |
|
2888
Paylocity
PCTY
$6.71B
| $27K | ﹤0.01% |
571
-137
| -19% | -$6.36K |
|
2889
PUT
Quantum Corp
QMCO
$437M
| $27K | ﹤0.01% |
+15
| New | +$2.01K |
|
2890
PUT
Qorvo
QRVO
$7.63B
| $27K | ﹤0.01% |
436
-26
| -6% | -$1.81K |
|
2891
Rockwell Medical
RMTI
$26.2M
| $27K | ﹤0.01% |
29
+4
| +16% | +$3.06K |
|
2892
PUT
Steel Dynamics
STLD
$35.6B
| $27K | ﹤0.01% |
294
-31
| -10% | -$1.09K |
|
2893
Strategic Education
STRA
$1.71B
| $27K | ﹤0.01% |
320
+146
| +84% | +$12.2K |
|
2894
PUT
TransDigm Group
TDG
$69.2B
| $27K | ﹤0.01% |
185
-527
| -74% | -$143K |
|
|
TGNA
2895
PUT
DELISTED
TEGNA Inc
TGNA
| $27K | ﹤0.01% |
500
-584
| -54% | -$7.83K |
|
|
TPH
2896
DELISTED
Tri Pointe Homes
TPH
| $27K | ﹤0.01% |
1,976
-14,979
| -88% | -$199K |
|
2897
Vericel Corp
VCEL
$2.3B
| $27K | ﹤0.01% |
4,529
+3,578
| +376% | +$13.7K |
|
2898
Vodafone
VOD
$34.9B
| $27K | ﹤0.01% |
+963
| New | +$27.9K |
|
|
SWN
2899
CALL
DELISTED
Southwestern Energy Company
SWN
| $27K | ﹤0.01% |
1,215
+362
| +42% | +$2.05K |
|
|
APRN
2900
CALL
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $27K | ﹤0.01% |
+3
| New | +$3.29K |
|
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.