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 | |
|---|---|---|---|---|---|---|
301
CALL
Deere & Co
DE
$164B
| $1.22M | 0.05% |
1,684
+571
| +51% | +$67K |
|
302
CALL
McDonald's
MCD
$188B
| $1.22M | 0.05% |
1,208
-1,232
| -50% | -$178K |
|
|
PXD
303
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.21M | 0.05% |
7,607
-19,626
| -72% | -$3.36M |
|
304
CALL
TransDigm Group
TDG
$67.2B
| $1.21M | 0.05% |
276
-178
| -39% | -$45.2K |
|
305
CALL
Delta Air Lines
DAL
$55.2B
| $1.19M | 0.05% |
3,492
+949
| +37% | +$46.5K |
|
306
CALL
Las Vegas Sands
LVS
$30.4B
| $1.19M | 0.05% |
2,101
+816
| +64% | +$48.9K |
|
307
TripAdvisor
TRIP
$1.61B
| $1.19M | 0.05% |
31,066
+15,468
| +99% | +$640K |
|
|
FIT
308
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $1.18M | 0.05% |
222,437
+182,527
| +457% | +$1.01M |
|
309
iShares Core US Aggregate Bond ETF
AGG
$138B
| $1.18M | 0.05% |
10,763
+6,547
| +155% | +$716K |
|
310
Lamar Advertising Co
LAMR
$16.1B
| $1.18M | 0.05% |
16,009
+7,857
| +96% | +$564K |
|
311
PUT
Biogen
BIIB
$29.6B
| $1.17M | 0.05% |
1,637
-139
| -8% | -$36.8K |
|
312
CALL
Yum China
YUMC
$14.9B
| $1.17M | 0.05% |
1,356
+247
| +22% | +$8.91K |
|
|
OPB
313
DELISTED
Opus Bank Common Stock
OPB
| $1.17M | 0.05% |
48,313
+10,242
| +27% | +$226K |
|
314
PUT
Mondelez International
MDLZ
$78.1B
| $1.16M | 0.05% |
7,295
+667
| +10% | +$30.1K |
|
315
PUT
Western Digital
WDC
$192B
| $1.16M | 0.05% |
7,856
+3,775
| +93% | +$251K |
|
316
CALL
Expedia Group
EXPE
$31.5B
| $1.16M | 0.05% |
945
+365
| +63% | +$51.2K |
|
317
Nucor
NUE
$53.8B
| $1.16M | 0.05% |
+20,000
| New | +$1.17M |
|
|
BLUE
318
DELISTED
bluebird bio
BLUE
| $1.16M | 0.05% |
849
-508
| -37% | -$613K |
|
|
WBC
319
DELISTED
WABCO HOLDINGS INC.
WBC
| $1.14M | 0.05% |
+8,922
| New | +$1.07M |
|
320
Myriad Genetics
MYGN
$536M
| $1.14M | 0.05% |
43,939
+24,701
| +128% | +$524K |
|
321
CALL
Bristol-Myers Squibb
BMY
$124B
| $1.13M | 0.05% |
5,658
-1,922
| -25% | -$105K |
|
322
CALL
Palo Alto Networks
PANW
$272B
| $1.13M | 0.05% |
7,416
-852
| -10% | -$17.2K |
|
323
PUT
Caterpillar
CAT
$414B
| $1.12M | 0.05% |
6,103
+1,859
| +44% | +$189K |
|
|
ETP
324
DELISTED
Energy Transfer Partners, L.P.
ETP
| $1.12M | 0.05% |
+54,875
| New | +$1.22M |
|
325
CALL
NXP Semiconductors
NXPI
$70.2B
| $1.11M | 0.05% |
2,589
+1,111
| +75% | +$119K |
|
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.