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 | |
|---|---|---|---|---|---|---|
4726
PUT
Chemed
CHE
$7.16B
| $4K | ﹤0.01% |
20
-2
| -9% | -$398 |
|
4727
CALL
Citizens
CIA
$248M
| $4K | ﹤0.01% |
106
-200
| -65% | -$1.32K |
|
4728
CALL
Cincinnati Financial
CINF
$27.8B
| $4K | ﹤0.01% |
29
+20
| +222% | +$1.42K |
|
4729
CALL
Compass Minerals
CMP
$1.23B
| $4K | ﹤0.01% |
122
+41
| +51% | +$2.73K |
|
4730
PUT
Costamare
CMRE
$1.85B
| $4K | ﹤0.01% |
42
-378
| -90% | -$2.64K |
|
4731
CALL
CONMED
CNMD
$1.3B
| $4K | ﹤0.01% |
+12
| New | +$594 |
|
4732
Compass Diversified
CODI
$752M
| $4K | ﹤0.01% |
239
-1,163
| -83% | -$19.4K |
|
4733
PUT
Cencora
COR
$62B
| $4K | ﹤0.01% |
52
-116
| -69% | -$10.3K |
|
4734
CALL
Consumer Portfolio Services
CPSS
$209M
| $4K | ﹤0.01% |
125
+42
| +51% | +$190 |
|
4735
PUT
Cheniere Energy
CQP
$30.5B
| $4K | ﹤0.01% |
332
-81
| -20% | -$2.58K |
|
4736
PUT
Carpenter Technology
CRS
$26.4B
| $4K | ﹤0.01% |
15
+4
| +36% | +$148 |
|
4737
Criteo
CRTO
$1.14B
| $4K | ﹤0.01% |
100
-5,372
| -98% | -$273K |
|
4738
PUT
Camping World
CWH
$384M
| $4K | ﹤0.01% |
24
+14
| +140% | +$414 |
|
4739
CALL
Designer Brands
DBI
$315M
| $4K | ﹤0.01% |
106
+83
| +361% | +$1.55K |
|
4740
DHI Group
DHX
$177M
| $4K | ﹤0.01% |
+1,597
| New | +$5.26K |
|
4741
PUT
Diana Shipping
DSX
$266M
| $4K | ﹤0.01% |
50
-255
| -84% | -$741 |
|
4742
CALL
DXP Enterprises
DXPE
$2.3B
| $4K | ﹤0.01% |
117
+71
| +154% | +$2.58K |
|
4743
PUT
Encore Capital Group
ECPG
$2.01B
| $4K | ﹤0.01% |
69
-315
| -82% | -$11.3K |
|
4744
PUT
8x8 Inc
EGHT
$279M
| $4K | ﹤0.01% |
54
+37
| +218% | +$525 |
|
4745
PUT
Enanta Pharmaceuticals
ENTA
$362M
| $4K | ﹤0.01% |
+98
| New | +$3.13K |
|
4746
Entegris
ENTG
$16.3B
| $4K | ﹤0.01% |
218
-29,051
| -99% | -$701K |
|
|
ESPR
4747
DELISTED
Esperion Therapeutics
ESPR
| $4K | ﹤0.01% |
100
-27,055
| -100% | -$995K |
|
4748
PUT
Extra Space Storage
EXR
$32.3B
| $4K | ﹤0.01% |
39
-19
| -33% | -$1.46K |
|
4749
PUT
FuelCell Energy
FCEL
$1.45B
| – | – |
0
| – | – |
|
4750
PUT
First Trust Natural Gas ETF
FCG
$632M
| $4K | ﹤0.01% |
50
+12
| +32% | +$267 |
|
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.