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 | |
|---|---|---|---|---|---|---|
|
SSRI
2051
DELISTED
Silver Standard Resources
SSRI
| $72K | ﹤0.01% |
+7,479
| New | +$75.1K |
|
2052
America Movil
AMX
$78.1B
| $71K | ﹤0.01% |
4,476
+1,357
| +44% | +$21K |
|
2053
CALL
Franklin Resources
BEN
$16.9B
| $71K | ﹤0.01% |
821
+697
| +562% | +$29.8K |
|
2054
PUT
Clorox
CLX
$11.6B
| $71K | ﹤0.01% |
340
+75
| +28% | +$10.1K |
|
2055
PUT
Energizer
ENR
$1.44B
| $71K | ﹤0.01% |
232
-284
| -55% | -$15.4K |
|
2056
Walker & Dunlop
WD
$1.65B
| $71K | ﹤0.01% |
+1,467
| New | +$68.4K |
|
|
ARNA
2057
CALL
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $71K | ﹤0.01% |
+266
| New | +$3.65K |
|
2058
PUT
Agnico Eagle Mines
AEM
$72.6B
| $70K | ﹤0.01% |
365
-357
| -49% | -$16.8K |
|
2059
PUT
Abercrombie & Fitch
ANF
$4.17B
| $70K | ﹤0.01% |
121
-1,710
| -93% | -$21.1K |
|
2060
PUT
Copa Holdings
CPA
$5.56B
| $70K | ﹤0.01% |
194
+30
| +18% | +$3.45K |
|
2061
MarineMax
HZO
$800M
| $70K | ﹤0.01% |
+3,616
| New | +$70.7K |
|
2062
Icahn Enterprises
IEP
$5.17B
| $70K | ﹤0.01% |
+1,218
| New | +$60.9K |
|
2063
CALL
LPL Financial
LPLA
$26.3B
| $70K | ﹤0.01% |
477
-391
| -45% | -$15.9K |
|
2064
CALL
Live Nation Entertainment
LYV
$41.2B
| $70K | ﹤0.01% |
843
+800
| +1,860% | +$26.8K |
|
2065
PUT
Polaris
PII
$4.15B
| $70K | ﹤0.01% |
100
+48
| +92% | +$4.12K |
|
2066
PUT
TransDigm Group
TDG
$69.2B
| $70K | ﹤0.01% |
712
+123
| +21% | +$31.2K |
|
2067
PUT
Take-Two Interactive
TTWO
$43B
| $70K | ﹤0.01% |
158
+42
| +36% | +$2.88K |
|
|
AERI
2068
DELISTED
Aerie Pharmaceuticals
AERI
| $70K | ﹤0.01% |
1,341
-7,125
| -84% | -$332K |
|
|
TCO
2069
DELISTED
Taubman Centers Inc.
TCO
| $70K | ﹤0.01% |
1,178
-1,273
| -52% | -$78.5K |
|
|
S
2070
PUT
DELISTED
Sprint Corporation
S
| $70K | ﹤0.01% |
732
-12
| -2% | -$100 |
|
|
PERY
2071
PUT
DELISTED
Perry Ellis International Inc
PERY
| $70K | ﹤0.01% |
529
+262
| +98% | +$5.14K |
|
|
BUFF
2072
DELISTED
Blue Buffalo Pet Products, Inc
BUFF
| $70K | ﹤0.01% |
+3,070
| New | +$72.6K |
|
2073
CALL
Chubb
CB
$140B
| $69K | ﹤0.01% |
213
+66
| +45% | +$9.29K |
|
2074
CALL
Celanese
CE
$5.09B
| $69K | ﹤0.01% |
223
-5
| -2% | -$445 |
|
|
CLDT
2075
Chatham Lodging
CLDT
$630M
| $69K | ﹤0.01% |
+3,439
| New | +$67.7K |
|
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.