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 | |
|---|---|---|---|---|---|---|
1226
Ryder
R
$10.4B
| $189K | 0.01% |
2,238
+1,554
| +227% | +$118K |
|
1227
Shake Shack
SHAK
$2.26B
| $189K | 0.01% |
5,704
+3,298
| +137% | +$108K |
|
|
AVP
1228
DELISTED
Avon Products, Inc.
AVP
| $189K | 0.01% |
+81,408
| New | +$241K |
|
|
AMID
1229
DELISTED
American Midstream Partners, LP
AMID
| $189K | 0.01% |
13,885
-2,229
| -14% | -$30.1K |
|
1230
PUT
Cirrus Logic
CRUS
$6.74B
| $188K | 0.01% |
353
-85
| -19% | -$4.98K |
|
1231
Vanda Pharmaceuticals
VNDA
$322M
| $188K | 0.01% |
+10,550
| New | +$177K |
|
|
ATRS
1232
DELISTED
Antares Pharma, Inc.
ATRS
| $188K | 0.01% |
58,295
+8,664
| +17% | +$26.7K |
|
1233
Essent Group
ESNT
$5.94B
| $187K | 0.01% |
4,630
-3,197
| -41% | -$124K |
|
1234
Intrepid Potash
IPI
$463M
| $187K | 0.01% |
4,296
+1,436
| +50% | +$48.4K |
|
1235
PUT
SiriusXM
SIRI
$10.1B
| $187K | 0.01% |
185
-36
| -16% | -$1.99K |
|
|
YRD
1236
CALL
Yiren Digital
YRD
$106M
| $187K | 0.01% |
193
+89
| +86% | +$3.34K |
|
|
GREK
1237
Global X MSCI Greece ETF
GREK
$281M
| $185K | 0.01% |
6,524
+2,644
| +68% | +$81.2K |
|
1238
CALL
Monster Beverage
MNST
$91.5B
| $185K | 0.01% |
1,280
+690
| +117% | +$18.6K |
|
1239
Pegasystems
PEGA
$4.28B
| $185K | 0.01% |
6,444
+484
| +8% | +$14K |
|
1240
Wolfspeed
WOLF
$1.35B
| $185K | 0.01% |
6,597
-5,448
| -45% | -$136K |
|
1241
CALL
Axos Financial
AX
$5.42B
| $184K | 0.01% |
494
+325
| +192% | +$8.49K |
|
1242
PUT
Burlington
BURL
$21.4B
| $184K | 0.01% |
324
+226
| +231% | +$19.8K |
|
1243
PUT
MiMedx Group
MDXG
$615M
| $184K | 0.01% |
1,213
+1,138
| +1,517% | +$16.9K |
|
1244
Varex Imaging
VREX
$452M
| $184K | 0.01% |
+5,443
| New | +$170K |
|
|
ACIA
1245
PUT
DELISTED
Acacia Communications Inc
ACIA
| $184K | 0.01% |
159
-184
| -54% | -$8.21K |
|
|
JJC
1246
DELISTED
iPath Bloomberg Copper Subindex Total Return ETN due October 22, 2037
JJC
| $184K | 0.01% |
5,486
+5,009
| +1,050% | +$166K |
|
1247
Brink's
BCO
$4.99B
| $183K | 0.01% |
2,181
-1,012
| -32% | -$77.1K |
|
1248
PUT
Cardinal Health
CAH
$52.9B
| $183K | 0.01% |
352
+157
| +81% | +$11.1K |
|
1249
iShares Russell Mid-Cap Growth ETF
IWP
$20.2B
| $183K | 0.01% |
3,242
-462
| -12% | -$25.3K |
|
1250
CALL
Microchip Technology
MCHP
$44.2B
| $183K | 0.01% |
410
-50
| -11% | -$2.1K |
|
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.