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 | |
|---|---|---|---|---|---|---|
3501
Ambev
ABEV
$47.4B
| $16K | ﹤0.01% |
3,094
-8,600
| -74% | -$49.1K |
|
3502
CALL
Acadia Pharmaceuticals
ACAD
$4.35B
| $16K | ﹤0.01% |
208
-697
| -77% | -$20.8K |
|
3503
PUT
Adient
ADNT
$1.62B
| $16K | ﹤0.01% |
156
-164
| -51% | -$11.2K |
|
3504
Aegon
AEG
$13.5B
| $16K | ﹤0.01% |
4,168
-8,331
| -67% | -$32.6K |
|
|
AGEN
3505
Agenus
AGEN
$255M
| $16K | ﹤0.01% |
+216
| New | +$15.2K |
|
3506
PUT
Amphastar Pharmaceuticals
AMPH
$846M
| $16K | ﹤0.01% |
+79
| New | +$1.25K |
|
3507
CALL
AvalonBay Communities
AVB
$26.8B
| $16K | ﹤0.01% |
67
-15
| -18% | -$2.87K |
|
3508
CALL
Builders FirstSource
BLDR
$7.82B
| $16K | ﹤0.01% |
201
-374
| -65% | -$5.59K |
|
3509
Bank of Hawaii
BOH
$3.17B
| $16K | ﹤0.01% |
+195
| New | +$15.7K |
|
3510
CALL
Box
BOX
$4.18B
| $16K | ﹤0.01% |
86
-22
| -20% | -$397 |
|
3511
PUT
Cogent Communications
CCOI
$612M
| $16K | ﹤0.01% |
+33
| New | +$1.37K |
|
3512
PUT
Columbus McKinnon
CMCO
$472M
| $16K | ﹤0.01% |
+24
| New | +$621 |
|
3513
Century Casinos
CNTY
$32.6M
| $16K | ﹤0.01% |
+2,206
| New | +$17.3K |
|
3514
PUT
CoStar Group
CSGP
$11.9B
| $16K | ﹤0.01% |
+100
| New | +$2.43K |
|
3515
PUT
Community Health Systems
CYH
$383M
| $16K | ﹤0.01% |
314
-335
| -52% | -$3.06K |
|
3516
Destination XL Group
DXLG
$34.3M
| $16K | ﹤0.01% |
+7,147
| New | +$17.5K |
|
3517
PUT
Equity Residential
EQR
$25.2B
| $16K | ﹤0.01% |
399
-146
| -27% | -$9.54K |
|
3518
PUT
EQT Corp
EQT
$32.5B
| $16K | ﹤0.01% |
298
+96
| +48% | +$3.04K |
|
3519
CALL
Fossil Group
FOSL
$249M
| $16K | ﹤0.01% |
206
-122
| -37% | -$1.65K |
|
3520
PUT
Galicia Financial Group
GGAL
$8.03B
| $16K | ﹤0.01% |
361
+110
| +44% | +$4.58K |
|
3521
CALL
Gaming and Leisure Properties
GLPI
$12.8B
| $16K | ﹤0.01% |
173
+126
| +268% | +$4.51K |
|
3522
Group 1 Automotive
GPI
$4.01B
| $16K | ﹤0.01% |
+263
| New | +$16.9K |
|
3523
CALL
Groupon
GRPN
$1.05B
| $16K | ﹤0.01% |
32
+17
| +113% | +$1.18K |
|
|
IRBT
3524
DELISTED
iRobot
IRBT
| $16K | ﹤0.01% |
200
-3,581
| -95% | -$309K |
|
3525
PUT
Illinois Tool Works
ITW
$81.9B
| $16K | ﹤0.01% |
38
-188
| -83% | -$26.2K |
|
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.