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 | |
|---|---|---|---|---|---|---|
426
CALL
ServiceNow
NOW
$98.4B
| $878K | 0.04% |
1,865
+880
| +89% | +$19.6K |
|
427
Vornado Realty Trust
VNO
$7.24B
| $873K | 0.04% |
11,368
+6,466
| +132% | +$493K |
|
428
CALL
Morgan Stanley
MS
$343B
| $871K | 0.04% |
3,391
-2,673
| -44% | -$124K |
|
429
Trinity Industries
TRN
$2.87B
| $864K | 0.04% |
37,656
+12,222
| +48% | +$252K |
|
430
Invesco CurrencyShares Swiss Franc Trust
FXF
$411M
| $857K | 0.04% |
8,772
+8,021
| +1,068% | +$789K |
|
431
PUT
SM Energy
SM
$7.96B
| $854K | 0.03% |
607
-38
| -6% | -$594 |
|
432
CALL
Puma Biotechnology
PBYI
$401M
| $850K | 0.03% |
245
+64
| +35% | +$5.95K |
|
433
LendingTree
TREE
$578M
| $849K | 0.03% |
3,477
-1,366
| -28% | -$295K |
|
434
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$158M
| $834K | 0.03% |
7,895
+4,017
| +104% | +$408K |
|
435
Altria Group
MO
$121B
| $834K | 0.03% |
+13,159
| New | +$877K |
|
|
SGMO
436
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $834K | 0.03% |
1,274
-323
| -20% | -$3.57K |
|
|
PXD
437
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $831K | 0.03% |
695
-228
| -25% | -$32.8K |
|
438
PUT
Seagate
STX
$205B
| $830K | 0.03% |
2,648
-850
| -24% | -$28.9K |
|
439
CALL
Bank of America
BAC
$432B
| $826K | 0.03% |
4,452
-6,120
| -58% | -$149K |
|
440
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $823K | 0.03% |
15,241
+10,510
| +222% | +$558K |
|
441
CALL
Intel
INTC
$516B
| $822K | 0.03% |
4,130
-871
| -17% | -$31K |
|
|
RTN
442
CALL
DELISTED
Raytheon Company
RTN
| $822K | 0.03% |
515
-134
| -21% | -$23.6K |
|
443
PUT
Broadcom
AVGO
$1.89T
| $821K | 0.03% |
23,660
+4,610
| +24% | +$114K |
|
444
CALL
Walt Disney
DIS
$166B
| $821K | 0.03% |
3,986
-254
| -6% | -$26.1K |
|
445
iShares Expanded Tech-Software Sector ETF
IGV
$13.2B
| $820K | 0.03% |
+28,065
| New | +$804K |
|
446
PUT
Western Digital
WDC
$192B
| $817K | 0.03% |
4,710
-3,146
| -40% | -$209K |
|
447
United Therapeutics
UTHR
$26.2B
| $816K | 0.03% |
6,967
-626
| -8% | -$79.9K |
|
|
TIME
448
DELISTED
Time Inc.
TIME
| $815K | 0.03% |
60,395
+3,988
| +7% | +$53.5K |
|
|
GOLD
449
DELISTED
Randgold Resources Ltd
GOLD
| $815K | 0.03% |
8,354
+8,193
| +5,089% | +$787K |
|
450
Precigen
PGEN
$1.9B
| $812K | 0.03% |
+42,721
| New | +$879K |
|
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.