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 | |
|---|---|---|---|---|---|---|
|
QIWI
1701
DELISTED
QIWI PLC
QIWI
| $101K | ﹤0.01% |
5,985
-22,212
| -79% | -$417K |
|
|
REN
1702
PUT
DELISTED
Resolute Energy Corporaton
REN
| $101K | ﹤0.01% |
317
-82
| -21% | -$2.44K |
|
1703
CALL
Carnival Corporation Ltd
CCL
$36.1B
| $100K | ﹤0.01% |
826
+456
| +123% | +$30.5K |
|
1704
CALL
Coherent
COHR
$55.2B
| $100K | ﹤0.01% |
607
+458
| +307% | +$17.1K |
|
1705
Extreme Networks
EXTR
$3.86B
| $100K | ﹤0.01% |
+8,428
| New | +$86.7K |
|
1706
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $100K | ﹤0.01% |
179
+21
| +13% | +$2.68K |
|
|
GRMN
1707
CALL
Garmin
GRMN
$46.9B
| $100K | ﹤0.01% |
250
-132
| -35% | -$6.83K |
|
1708
PUT
Star Bulk Carriers
SBLK
$3.14B
| $100K | ﹤0.01% |
656
+583
| +799% | +$6.07K |
|
|
SHYF
1709
DELISTED
The Shyft Group
SHYF
| $100K | ﹤0.01% |
+9,063
| New | +$84.4K |
|
1710
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $100K | ﹤0.01% |
17,264
-14,536
| -46% | -$169K |
|
1711
PUT
Tenet Healthcare
THC
$20.1B
| $100K | ﹤0.01% |
680
-205
| -23% | -$3.48K |
|
|
BRCD
1712
DELISTED
Brocade Communications Systems, Inc. NEW
BRCD
| $100K | ﹤0.01% |
+8,370
| New | +$103K |
|
1713
CALL
ACI Worldwide
ACIW
$5.72B
| $99K | ﹤0.01% |
570
+384
| +206% | +$8.7K |
|
1714
Gold Fields
GFI
$29.2B
| $99K | ﹤0.01% |
23,169
-25,444
| -52% | -$104K |
|
1715
PUT
Eli Lilly
LLY
$1.07T
| $99K | ﹤0.01% |
1,193
-1,410
| -54% | -$116K |
|
1716
PUT
lululemon athletica
LULU
$13B
| $99K | ﹤0.01% |
1,474
-651
| -31% | -$39.2K |
|
1717
PUT
Pan American Silver
PAAS
$18.6B
| $99K | ﹤0.01% |
232
-345
| -60% | -$5.95K |
|
1718
Progress Software
PRGS
$1.55B
| $99K | ﹤0.01% |
2,610
-4,192
| -62% | -$140K |
|
1719
Telefônica Brasil
VIV
$22.4B
| $99K | ﹤0.01% |
6,304
-19,917
| -76% | -$302K |
|
|
RAD
1720
PUT
DELISTED
Rite Aid Corporation
RAD
| $99K | ﹤0.01% |
69
-110
| -61% | -$5.21K |
|
|
CA
1721
CALL
DELISTED
CA, Inc.
CA
| $99K | ﹤0.01% |
879
-92
| -9% | -$3.04K |
|
1722
Acacia Research
ACTG
$450M
| $98K | ﹤0.01% |
21,746
+21,624
| +17,725% | +$80.9K |
|
1723
CALL
Etsy
ETSY
$7.65B
| $98K | ﹤0.01% |
351
-472
| -57% | -$7.45K |
|
1724
PUT
Fossil Group
FOSL
$239M
| $98K | ﹤0.01% |
420
-1,017
| -71% | -$9.54K |
|
1725
Jazz Pharmaceuticals
JAZZ
$15.9B
| $98K | ﹤0.01% |
+673
| New | +$102K |
|
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.