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 | |
|---|---|---|---|---|---|---|
3601
PUT
Heron Therapeutics
HRTX
$92M
| $12K | ﹤0.01% |
88
+82
| +1,367% | +$1.29K |
|
3602
PUT
Huazhu Hotels Group
HTHT
$13.2B
| $12K | ﹤0.01% |
184
-444
| -71% | -$11.5K |
|
3603
CALL
Intercontinental Exchange
ICE
$86.4B
| $12K | ﹤0.01% |
42
-34
| -45% | -$2.24K |
|
3604
Jakks Pacific
JAKK
$305M
| $12K | ﹤0.01% |
405
-4,493
| -92% | -$152K |
|
3605
PUT
Jabil
JBL
$31.7B
| $12K | ﹤0.01% |
84
+45
| +115% | +$1.36K |
|
3606
PUT
Knight Transportation
KNX
$11.4B
| $12K | ﹤0.01% |
+253
| New | +$9.59K |
|
3607
CALL
Lithia Motors
LAD
$8.17B
| $12K | ﹤0.01% |
12
+4
| +50% | +$419 |
|
3608
PUT
LG Display
LPL
$2.93B
| $12K | ﹤0.01% |
51
-131
| -72% | -$1.88K |
|
3609
CALL
Macerich
MAC
$7.52B
| $12K | ﹤0.01% |
144
+12
| +9% | +$673 |
|
3610
CALL
Mattel
MAT
$4.49B
| $12K | ﹤0.01% |
530
-131
| -20% | -$2.34K |
|
3611
PUT
MBIA
MBI
$278M
| $12K | ﹤0.01% |
99
+55
| +125% | +$552 |
|
|
LITS
3612
Lite Strategy Inc
LITS
$33M
| $12K | ﹤0.01% |
+225
| New | +$12.5K |
|
3613
Mercer International
MERC
$45.6M
| $12K | ﹤0.01% |
1,017
-12,645
| -93% | -$142K |
|
3614
Quanex
NX
$893M
| $12K | ﹤0.01% |
557
-945
| -63% | -$19.6K |
|
3615
PUT
Omega Healthcare
OHI
$15.4B
| $12K | ﹤0.01% |
322
-29
| -8% | -$929 |
|
3616
PUT
OSI Systems
OSIS
$3.64B
| $12K | ﹤0.01% |
214
+91
| +74% | +$7.4K |
|
3617
PUT
Sally Beauty Holdings
SBH
$1.48B
| $12K | ﹤0.01% |
+136
| New | +$2.67K |
|
3618
PUT
Sibanye-Stillwater
SBSW
$5.93B
| $12K | ﹤0.01% |
164
-196
| -54% | -$985 |
|
3619
CALL
SiriusXM
SIRI
$10.7B
| $12K | ﹤0.01% |
146
-109
| -43% | -$6.03K |
|
3620
CALL
Skywest
SKYW
$4.51B
| $12K | ﹤0.01% |
54
-88
| -62% | -$3.29K |
|
3621
PUT
Spectrum Brands
SPB
$2.08B
| $12K | ﹤0.01% |
13
-9
| -41% | -$1.01K |
|
3622
CALL
The Bancorp
TBBK
$2.86B
| $12K | ﹤0.01% |
+100
| New | +$775 |
|
3623
CALL
Titan Machinery
TITN
$458M
| $12K | ﹤0.01% |
180
+64
| +55% | +$1.03K |
|
3624
CALL
Invesco DB US Dollar Index Bearish Fund
UDN
$107M
| $12K | ﹤0.01% |
1,137
+839
| +282% | +$18.7K |
|
3625
PUT
Universal Corp
UVV
$1.36B
| $12K | ﹤0.01% |
14
-18
| -56% | -$1.08K |
|
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.