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 | |
|---|---|---|---|---|---|---|
|
CYOU
1901
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $85K | ﹤0.01% |
+2,218
| New | +$76.2K |
|
|
AFSI
1902
PUT
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $85K | ﹤0.01% |
587
+74
| +14% | +$1.09K |
|
1903
PUT
DaVita
DVA
$15.1B
| $84K | ﹤0.01% |
386
+288
| +294% | +$19.1K |
|
1904
PUT
Fortinet
FTNT
$112B
| $84K | ﹤0.01% |
1,585
-450
| -22% | -$3.49K |
|
1905
Hilltop Holdings
HTH
$2.29B
| $84K | ﹤0.01% |
3,228
+2,091
| +184% | +$55.4K |
|
1906
InterDigital
IDCC
$6.68B
| $84K | ﹤0.01% |
1,097
-7,621
| -87% | -$639K |
|
1907
CALL
Jazz Pharmaceuticals
JAZZ
$15.9B
| $84K | ﹤0.01% |
117
+70
| +149% | +$10.7K |
|
1908
CALL
Toll Brothers
TOL
$14B
| $84K | ﹤0.01% |
140
+5
| +4% | +$187 |
|
1909
PUT
Yum! Brands
YUM
$41B
| $84K | ﹤0.01% |
1,229
-165
| -12% | -$11.5K |
|
|
MODN
1910
DELISTED
MODEL N, INC.
MODN
| $84K | ﹤0.01% |
6,354
-18,926
| -75% | -$226K |
|
|
VER
1911
PUT
DELISTED
VEREIT, Inc.
VER
| $84K | ﹤0.01% |
109
+40
| +58% | +$1.65K |
|
|
ELOS
1912
DELISTED
Syneron Medical Ltd
ELOS
| $84K | ﹤0.01% |
7,736
+2,159
| +39% | +$23.7K |
|
|
CY
1913
PUT
DELISTED
Cypress Semiconductor
CY
| $84K | ﹤0.01% |
677
-639
| -49% | -$8.7K |
|
1914
PUT
Centene
CNC
$31.3B
| $83K | ﹤0.01% |
744
+198
| +36% | +$7.47K |
|
|
HBI
1915
CALL
DELISTED
Hanesbrands
HBI
| $83K | ﹤0.01% |
717
+180
| +34% | +$3.88K |
|
1916
NGL Energy Partners
NGL
$1.94B
| $83K | ﹤0.01% |
5,947
+5,517
| +1,283% | +$88.3K |
|
1917
PUT
OFG Bancorp
OFG
$2.21B
| $83K | ﹤0.01% |
981
+193
| +24% | +$2.03K |
|
1918
Shake Shack
SHAK
$2.3B
| $83K | ﹤0.01% |
2,406
-1,743
| -42% | -$62.4K |
|
1919
PUT
Sherwin-Williams
SHW
$78.3B
| $83K | ﹤0.01% |
753
+459
| +156% | +$51.3K |
|
1920
CALL
Teladoc Health
TDOC
$1.58B
| $83K | ﹤0.01% |
179
-206
| -54% | -$6K |
|
1921
CALL
Trade Desk
TTD
$8.13B
| $83K | ﹤0.01% |
+2,290
| New | +$10.5K |
|
1922
PUT
Upbound Group
UPBD
$1.19B
| $83K | ﹤0.01% |
1,071
+1,040
| +3,355% | +$11.8K |
|
1923
Energous
WATT
$80.3M
| $83K | ﹤0.01% |
9
+4
| +80% | +$35.6K |
|
|
EBSB
1924
DELISTED
Meridian Bancorp, Inc.
EBSB
| $83K | ﹤0.01% |
+4,936
| New | +$85.2K |
|
|
XRM
1925
DELISTED
Xerium Technologies Inc (new)
XRM
| $83K | ﹤0.01% |
11,613
+9,025
| +349% | +$62.7K |
|
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.