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 | |
|---|---|---|---|---|---|---|
1151
abrdn Physical Gold Shares ETF
SGOL
$6.91B
| $213K | 0.01% |
17,210
-6,760
| -28% | -$83.9K |
|
1152
CALL
VeriSign
VRSN
$23.8B
| $213K | 0.01% |
423
+3
| +0.7% | +$302 |
|
1153
PUT
RH
RH
$3.14B
| $212K | 0.01% |
984
+213
| +28% | +$13.4K |
|
1154
CALL
Whirlpool
WHR
$2.31B
| $212K | 0.01% |
333
+7
| +2% | +$1.25K |
|
1155
Encompass Health
EHC
$11B
| $210K | 0.01% |
5,700
+3,221
| +130% | +$115K |
|
|
PPLI
1156
People Inc
PPLI
$3.14B
| $210K | 0.01% |
10,027
+4,264
| +74% | +$82.8K |
|
1157
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.9B
| $209K | 0.01% |
383
+1
| +0.3% | +$318 |
|
|
LGF.A
1158
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $209K | 0.01% |
6,274
+820
| +15% | +$24.2K |
|
|
MULE
1159
DELISTED
MuleSoft, Inc.
MULE
| $209K | 0.01% |
+10,382
| New | +$231K |
|
|
ESV
1160
PUT
DELISTED
Ensco Rowan plc
ESV
| $209K | 0.01% |
74
-13
| -15% | -$259 |
|
1161
CALL
Burlington
BURL
$21.4B
| $208K | 0.01% |
202
-136
| -40% | -$11.9K |
|
1162
Karyopharm Therapeutics
KPTI
$161M
| $208K | 0.01% |
+1,267
| New | +$181K |
|
1163
NGL Energy Partners
NGL
$2.01B
| $208K | 0.01% |
18,012
+12,065
| +203% | +$133K |
|
1164
CALL
ON Semiconductor
ON
$35.1B
| $208K | 0.01% |
607
-173
| -22% | -$2.78K |
|
1165
CALL
Home BancShares
HOMB
$6.16B
| $207K | 0.01% |
701
+651
| +1,302% | +$15.6K |
|
|
CVA
1166
DELISTED
Covanta Holding Corporation
CVA
| $207K | 0.01% |
13,970
+12,161
| +672% | +$171K |
|
1167
Cars.com
CARS
$638M
| $206K | 0.01% |
7,743
+6,070
| +363% | +$154K |
|
1168
CALL
Vanguard S&P 500 ETF
VOO
$967B
| $206K | 0.01% |
724
-316
| -30% | -$71.6K |
|
1169
PUT
Verizon
VZ
$183B
| $206K | 0.01% |
2,220
-729
| -25% | -$34.3K |
|
1170
Willis Towers Watson
WTW
$27.2B
| $205K | 0.01% |
1,333
-2,554
| -66% | -$381K |
|
1171
PUT
Zimmer Biomet
ZBH
$17.3B
| $205K | 0.01% |
241
+68
| +39% | +$7.85K |
|
|
RDS.A
1172
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $205K | 0.01% |
2,974
+1,131
| +61% | +$63.2K |
|
|
FINL
1173
PUT
DELISTED
Finish Line
FINL
| $205K | 0.01% |
1,353
+442
| +49% | +$5.28K |
|
1174
PUT
Blackstone
BX
$152B
| $204K | 0.01% |
2,953
+1,108
| +60% | +$36.5K |
|
1175
PUT
Wayfair
W
$10.9B
| $204K | 0.01% |
558
-42
| -7% | -$3.12K |
|
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.