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 | |
|---|---|---|---|---|---|---|
|
CARB
1276
DELISTED
Carbonite Inc
CARB
| $177K | 0.01% |
8,058
+5,809
| +258% | +$123K |
|
|
AABA
1277
PUT
DELISTED
Altaba Inc
AABA
| $177K | 0.01% |
2,893
-2,067
| -42% | -$127K |
|
1278
CALL
Nu Skin
NUS
$247M
| $176K | 0.01% |
358
+88
| +33% | +$5.4K |
|
1279
CALL
Thor Industries
THO
$3.9B
| $176K | 0.01% |
214
+120
| +128% | +$12.9K |
|
|
TOUR
1280
Tuniu
TOUR
$55.9M
| $176K | 0.01% |
2,261
+2,188
| +2,997% | +$170K |
|
1281
CALL
Veeva Systems
VEEV
$29.2B
| $176K | 0.01% |
675
-159
| -19% | -$9.64K |
|
|
MGI
1282
PUT
DELISTED
MoneyGram International, Inc. New
MGI
| $176K | 0.01% |
1,764
+1,201
| +213% | +$19.4K |
|
|
VSI
1283
PUT
DELISTED
Vitamin Shoppe Inc.
VSI
| $176K | 0.01% |
810
+786
| +3,275% | +$6.07K |
|
1284
Allison Transmission
ALSN
$9.92B
| $175K | 0.01% |
4,678
+4,304
| +1,151% | +$157K |
|
1285
CALL
Terex
TEX
$7.83B
| $175K | 0.01% |
219
-127
| -37% | -$5.03K |
|
|
VER
1286
DELISTED
VEREIT, Inc.
VER
| $175K | 0.01% |
4,230
+231
| +6% | +$9.74K |
|
1287
Becton Dickinson
BDX
$42.1B
| $174K | 0.01% |
914
+754
| +471% | +$146K |
|
1288
PUT
Franklin Covey
FC
$236M
| $174K | 0.01% |
641
+317
| +98% | +$5.9K |
|
1289
Manitowoc
MTW
$503M
| $174K | 0.01% |
4,838
+894
| +23% | +$26K |
|
1290
CALL
Transocean
RIG
$5.89B
| $174K | 0.01% |
1,103
+958
| +661% | +$8.25K |
|
1291
CALL
Williams Companies
WMB
$92B
| $174K | 0.01% |
2,285
+1,087
| +91% | +$33.1K |
|
|
FMSA
1292
DELISTED
Fairmount Santrol Holdings Inc.
FMSA
| $174K | 0.01% |
36,435
-107,464
| -75% | -$348K |
|
|
ESV
1293
DELISTED
Ensco Rowan plc
ESV
| $174K | 0.01% |
7,317
-8,013
| -52% | -$160K |
|
1294
PUT
Ambarella
AMBA
$3.09B
| $173K | 0.01% |
460
+163
| +55% | +$8.04K |
|
|
FRGI
1295
DELISTED
Fiesta Restaurant Group, Inc.
FRGI
| $173K | 0.01% |
9,126
+8,082
| +774% | +$145K |
|
1296
PUT
Autodesk
ADSK
$43.3B
| $172K | 0.01% |
638
-451
| -41% | -$49.8K |
|
1297
PUT
Dillards
DDS
$8.76B
| $172K | 0.01% |
333
-224
| -40% | -$13.8K |
|
1298
CALL
Newmont
NEM
$101B
| $172K | 0.01% |
1,341
+239
| +22% | +$8.68K |
|
|
CTRA
1299
PUT
DELISTED
Coterra Energy
CTRA
| $171K | 0.01% |
1,610
-457
| -22% | -$11.6K |
|
1300
Hyster-Yale Materials Handling
HY
$594M
| $171K | 0.01% |
2,243
+1,252
| +126% | +$87.9K |
|
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.