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 | |
|---|---|---|---|---|---|---|
|
GRMN
326
Garmin
GRMN
$46.4B
| $1.11M | 0.05% |
+21,738
| New | +$1.11M |
|
327
Zimmer Biomet
ZBH
$17.2B
| $1.11M | 0.05% |
+8,878
| New | +$1.05M |
|
328
Tucows
TCX
$105M
| $1.1M | 0.05% |
20,666
-9,552
| -32% | -$551K |
|
329
Welltower
WELL
$173B
| $1.1M | 0.05% |
+14,701
| New | +$1.07M |
|
330
British American Tobacco
BTI
$134B
| $1.1M | 0.05% |
+16,009
| New | +$1.11M |
|
331
CALL
Herbalife
HLF
$1.26B
| $1.09M | 0.05% |
2,108
+152
| +8% | +$5.12K |
|
332
CALL
SPDR Gold Trust
GLD
$133B
| $1.09M | 0.05% |
7,095
-2,438
| -26% | -$292K |
|
333
Ashland
ASH
$3.13B
| $1.09M | 0.05% |
+16,580
| New | +$1.05M |
|
334
CALL
United Parcel Service
UPS
$98.5B
| $1.09M | 0.05% |
4,566
+2,019
| +79% | +$216K |
|
335
CALL
Wells Fargo
WFC
$262B
| $1.09M | 0.05% |
4,616
-41
| -0.9% | -$2.2K |
|
336
Planet Fitness
PLNT
$4.28B
| $1.09M | 0.05% |
+46,633
| New | +$978K |
|
|
CELG
337
PUT
DELISTED
Celgene Corp
CELG
| $1.09M | 0.05% |
4,259
+2,302
| +118% | +$282K |
|
|
EGN
338
DELISTED
Energen
EGN
| $1.08M | 0.05% |
21,989
+18,682
| +565% | +$997K |
|
339
Gaming and Leisure Properties
GLPI
$12.7B
| $1.08M | 0.05% |
28,597
+21,913
| +328% | +$785K |
|
|
X
340
CALL
DELISTED
US Steel
X
| $1.07M | 0.05% |
6,363
-10
| -0.2% | -$237 |
|
|
MXIM
341
DELISTED
Maxim Integrated Products
MXIM
| $1.07M | 0.05% |
+23,821
| New | +$1.09M |
|
|
AET
342
CALL
DELISTED
Aetna Inc
AET
| $1.07M | 0.05% |
654
-201
| -24% | -$28.4K |
|
343
Coty
COTY
$2.4B
| $1.06M | 0.05% |
+56,429
| New | +$1.05M |
|
|
LN
344
DELISTED
LINE Corporation
LN
| $1.06M | 0.05% |
30,367
+11,360
| +60% | +$405K |
|
|
MBLY
345
DELISTED
Mobileye N.V.
MBLY
| $1.05M | 0.05% |
16,754
-80,644
| -83% | -$5M |
|
|
PF
346
DELISTED
Pinnacle Foods, Inc.
PF
| $1.05M | 0.05% |
17,691
-10,078
| -36% | -$602K |
|
347
Aptiv
APTV
$12.3B
| $1.05M | 0.05% |
+11,955
| New | +$998K |
|
|
348
PUT
AT&T
T
$160B
| $1.05M | 0.05% |
6,036
-5,112
| -46% | -$151K |
|
349
CALL
Norfolk Southern
NSC
$74.3B
| $1.04M | 0.05% |
1,256
+202
| +19% | +$23.7K |
|
350
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $1.04M | 0.05% |
45,010
+20,710
| +85% | +$152K |
|
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.