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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BRSL
1851
Brightstar Lottery PLC
BRSL
$1.91B
| $89K | ﹤0.01% |
4,915
-56
| -1% | -$1.15K |
|
1852
CALL
MiMedx Group
MDXG
$626M
| $89K | ﹤0.01% |
+907
| New | +$12.1K |
|
1853
CALL
Monster Beverage
MNST
$91.4B
| $89K | ﹤0.01% |
590
-310
| -34% | -$7.47K |
|
1854
Ultragenyx Pharmaceutical
RARE
$2.65B
| $89K | ﹤0.01% |
1,441
-6,457
| -82% | -$389K |
|
1855
CALL
SiriusXM
SIRI
$10B
| $89K | ﹤0.01% |
255
+211
| +480% | +$10.8K |
|
1856
CALL
Sony
SONY
$123B
| $89K | ﹤0.01% |
1,465
+905
| +162% | +$6.42K |
|
|
RAD
1857
DELISTED
Rite Aid Corporation
RAD
| $89K | ﹤0.01% |
1,525
+940
| +161% | +$71K |
|
|
MXIM
1858
CALL
DELISTED
Maxim Integrated Products
MXIM
| $89K | ﹤0.01% |
878
-778
| -47% | -$35.7K |
|
|
DERM
1859
DELISTED
Dermira, Inc.
DERM
| $89K | ﹤0.01% |
3,083
+2,248
| +269% | +$68.3K |
|
|
KITE
1860
PUT
DELISTED
Kite Pharma, Inc.
KITE
| $89K | ﹤0.01% |
594
+188
| +46% | +$15.3K |
|
|
STMP
1861
PUT
DELISTED
Stamps.com, Inc.
STMP
| $89K | ﹤0.01% |
779
+658
| +544% | +$82.9K |
|
1862
CALL
Analog Devices
ADI
$181B
| $88K | ﹤0.01% |
827
+743
| +885% | +$59K |
|
1863
PUT
BioCryst Pharmaceuticals
BCRX
$2.37B
| $88K | ﹤0.01% |
648
+572
| +753% | +$3.48K |
|
1864
PUT
Blackrock
BLK
$164B
| $88K | ﹤0.01% |
259
+3
| +1% | +$1.2K |
|
1865
CALL
ConocoPhillips
COP
$147B
| $88K | ﹤0.01% |
2,098
-2,275
| -52% | -$106K |
|
1866
Live Nation Entertainment
LYV
$41.2B
| $88K | ﹤0.01% |
2,540
-8,152
| -76% | -$273K |
|
|
GBT
1867
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $88K | ﹤0.01% |
+3,239
| New | +$96.4K |
|
|
CYS
1868
DELISTED
CYS Investments Inc.
CYS
| $88K | ﹤0.01% |
10,530
+6,052
| +135% | +$50.9K |
|
1869
Barclays
BCS
$94.1B
| $87K | ﹤0.01% |
8,667
-7,106
| -45% | -$72.5K |
|
1870
CNX Resources
CNX
$4.85B
| $87K | ﹤0.01% |
+6,990
| New | +$90.2K |
|
1871
iShares Select Dividend ETF
DVY
$24B
| $87K | ﹤0.01% |
+944
| New | +$86.8K |
|
1872
PUT
Editas Medicine
EDIT
$399M
| $87K | ﹤0.01% |
376
+54
| +17% | +$973 |
|
1873
CALL
Franco-Nevada
FNV
$41.4B
| $87K | ﹤0.01% |
487
+51
| +12% | +$3.61K |
|
1874
Direxion Daily S&P Biotech Bear 3X ETF
LABD
$65.4M
| $87K | ﹤0.01% |
6
+4
| +200% | +$76.9K |
|
1875
CALL
Navient
NAVI
$774M
| $87K | ﹤0.01% |
828
-500
| -38% | -$7.54K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.