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 | |
|---|---|---|---|---|---|---|
3451
CALL
Columbia Sportswear
COLM
$3.25B
| $17K | ﹤0.01% |
141
-43
| -23% | -$2.43K |
|
|
DHC
3452
Diversified Healthcare Trust
DHC
$2.28B
| $17K | ﹤0.01% |
+835
| New | +$17.8K |
|
3453
PUT
Danaher
DHR
$138B
| $17K | ﹤0.01% |
218
+204
| +1,457% | +$15.3K |
|
3454
PUT
EnerSys
ENS
$6.94B
| $17K | ﹤0.01% |
+73
| New | +$5.75K |
|
3455
PUT
Exelon
EXC
$48.2B
| $17K | ﹤0.01% |
552
+239
| +76% | +$6.08K |
|
3456
Ezcorp Inc
EZPW
$1.87B
| $17K | ﹤0.01% |
+2,289
| New | +$19.9K |
|
3457
PUT
GSK
GSK
$104B
| $17K | ﹤0.01% |
189
-182
| -49% | -$9.7K |
|
|
HEES
3458
CALL
DELISTED
H&E Equipment Services
HEES
| $17K | ﹤0.01% |
158
+17
| +12% | +$356 |
|
3459
CALL
Heron Therapeutics
HRTX
$86.9M
| $17K | ﹤0.01% |
113
-6
| -5% | -$87 |
|
3460
El Pollo Loco
LOCO
$493M
| $17K | ﹤0.01% |
1,281
+552
| +76% | +$7.35K |
|
3461
PUT
Match Group
MTCH
$9.05B
| $17K | ﹤0.01% |
399
-110
| -22% | -$2.02K |
|
3462
PUT
Meritage Homes
MTH
$4.89B
| $17K | ﹤0.01% |
310
-80
| -21% | -$1.59K |
|
3463
Nutanix
NTNX
$15.4B
| $17K | ﹤0.01% |
850
-74,910
| -99% | -$1.31M |
|
3464
CALL
Opko Health
OPK
$936M
| $17K | ﹤0.01% |
368
-111
| -23% | -$778 |
|
3465
PUT
OSI Systems
OSIS
$3.58B
| $17K | ﹤0.01% |
123
+9
| +8% | +$681 |
|
3466
PUT
Palisade Bio
PALI
$353M
| – | – |
0
| – | – |
|
3467
CALL
Plug Power
PLUG
$2.87B
| $17K | ﹤0.01% |
+402
| New | +$842 |
|
3468
CALL
Ultragenyx Pharmaceutical
RARE
$2.65B
| $17K | ﹤0.01% |
95
-3
| -3% | -$181 |
|
3469
Regis Corp
RGS
$68.3M
| $17K | ﹤0.01% |
85
+77
| +963% | +$15.8K |
|
3470
PUT
Banco Santander
SAN
$200B
| $17K | ﹤0.01% |
266
-27
| -9% | -$168 |
|
3471
CALL
Teradyne
TER
$52.4B
| $17K | ﹤0.01% |
192
-52
| -21% | -$1.75K |
|
3472
PUT
Toll Brothers
TOL
$14.1B
| $17K | ﹤0.01% |
284
+46
| +19% | +$1.72K |
|
3473
PUT
LendingTree
TREE
$564M
| $17K | ﹤0.01% |
59
-38
| -39% | -$5.72K |
|
3474
CALL
Universal Health Services
UHS
$9.64B
| $17K | ﹤0.01% |
164
+33
| +25% | +$3.93K |
|
3475
CALL
Marriott Vacations Worldwide
VAC
$3.4B
| $17K | ﹤0.01% |
35
+29
| +483% | +$3.27K |
|
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.