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 | |
|---|---|---|---|---|---|---|
1376
CALL
Cognizant
CTSH
$21.2B
| $155K | 0.01% |
404
+21
| +5% | +$1.48K |
|
1377
DHT Holdings
DHT
$2.98B
| $155K | 0.01% |
39,032
-10,919
| -22% | -$43.8K |
|
1378
CALL
Greif
GEF
$4.41B
| $155K | 0.01% |
215
+13
| +6% | +$741 |
|
|
STZ.B
1379
PUT
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $155K | 0.01% |
1,000
-445
| -31% | -$87.6K |
|
1380
PUT
Navient
NAVI
$807M
| $154K | 0.01% |
523
-81
| -13% | -$1.18K |
|
1381
PUT
American Express
AXP
$221B
| $153K | 0.01% |
1,944
-1,213
| -38% | -$104K |
|
1382
Corning
GLW
$129B
| $153K | 0.01% |
+5,122
| New | +$152K |
|
1383
PUT
Vertex Pharmaceuticals
VRTX
$122B
| $153K | 0.01% |
760
+90
| +13% | +$13.5K |
|
1384
PUT
AbbVie
ABBV
$457B
| $152K | 0.01% |
2,385
-924
| -28% | -$70.3K |
|
1385
Belden
BDC
$4.02B
| $152K | 0.01% |
1,888
+1,750
| +1,268% | +$132K |
|
1386
CALL
Eaton
ETN
$159B
| $152K | 0.01% |
696
-313
| -31% | -$23.6K |
|
1387
Fluor
FLR
$7.29B
| $152K | 0.01% |
3,624
-14,422
| -80% | -$598K |
|
1388
PUT
Honeywell
HON
$77B
| $152K | 0.01% |
4,015
+2,104
| +110% | +$261K |
|
1389
Monarch Casino & Resort
MCRI
$2.15B
| $152K | 0.01% |
+3,869
| New | +$131K |
|
1390
Open Text
OTEX
$5.4B
| $152K | 0.01% |
4,735
-7,685
| -62% | -$249K |
|
|
HT
1391
DELISTED
Hersha Hospitality Trust Priority Class A Common Shares of Beneficial Interest
HT
| $152K | 0.01% |
8,142
+6,697
| +463% | +$123K |
|
|
HABT
1392
DELISTED
The Habit Restaurants, Inc. - Class A
HABT
| $152K | 0.01% |
11,674
+2,831
| +32% | +$40.9K |
|
1393
CALL
APA Corp
APA
$13B
| $151K | 0.01% |
971
-855
| -47% | -$37.7K |
|
1394
CALL
O'Reilly Automotive
ORLY
$71.9B
| $151K | 0.01% |
1,680
+435
| +35% | +$5.74K |
|
1395
CALL
T. Rowe Price
TROW
$24.9B
| $151K | 0.01% |
199
+26
| +15% | +$2.15K |
|
1396
CALL
FMC
FMC
$1.45B
| $150K | 0.01% |
270
+16
| +6% | +$1.15K |
|
1397
PUT
Kimberly-Clark
KMB
$36.2B
| $150K | 0.01% |
679
+314
| +86% | +$38.3K |
|
1398
MakeMyTrip
MMYT
$4.71B
| $150K | 0.01% |
5,243
+2,031
| +63% | +$65K |
|
1399
Scorpio Tankers
STNG
$3.95B
| $150K | 0.01% |
4,402
-197
| -4% | -$7.16K |
|
1400
CALL
United Airlines
UAL
$38.5B
| $150K | 0.01% |
1,192
-389
| -25% | -$25.9K |
|
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.