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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
251
PUT
IBM
IBM
$197B
| $1.6M | 0.07% |
12,133
+7,338
| +153% | +$1.23M |
|
252
PUT
Deutsche Bank
DB
$68.2B
| $1.6M | 0.07% |
7,230
-725
| -9% | -$12.6K |
|
|
BLUE
253
DELISTED
bluebird bio
BLUE
| $1.6M | 0.07% |
1,357
+1,335
| +6,068% | +$1.36M |
|
|
PNRA
254
DELISTED
Panera Bread Co
PNRA
| $1.6M | 0.07% |
+6,100
| New | +$1.38M |
|
255
PUT
Qualcomm
QCOM
$186B
| $1.59M | 0.07% |
6,068
+3,744
| +161% | +$217K |
|
256
CALL
Applied Materials
AMAT
$444B
| $1.59M | 0.07% |
4,015
+1,301
| +48% | +$46.7K |
|
|
X
257
PUT
DELISTED
US Steel
X
| $1.57M | 0.07% |
7,109
-588
| -8% | -$20.9K |
|
258
Acadia Pharmaceuticals
ACAD
$4.28B
| $1.57M | 0.07% |
45,691
+41,683
| +1,040% | +$1.47M |
|
259
PUT
Chipotle Mexican Grill
CMG
$42.2B
| $1.57M | 0.07% |
139,650
+45,950
| +49% | +$379K |
|
260
Ionis Pharmaceuticals
IONS
$8.82B
| $1.55M | 0.07% |
+38,575
| New | +$1.73M |
|
261
PUT
Teva Pharmaceuticals
TEVA
$35.7B
| $1.55M | 0.07% |
5,819
+3,583
| +160% | +$122K |
|
|
LUMO
262
DELISTED
Lumos Pharma, Inc. Common Stock
LUMO
| $1.54M | 0.07% |
7,121
+5,595
| +367% | +$799K |
|
263
Tucows
TCX
$109M
| $1.54M | 0.07% |
30,218
+27,607
| +1,057% | +$1.27M |
|
264
Hewlett Packard
HPE
$65.2B
| $1.53M | 0.07% |
+111,000
| New | +$1.49M |
|
265
F5
FFIV
$22.8B
| $1.51M | 0.07% |
10,604
+6,301
| +146% | +$899K |
|
266
YPF
YPF
$20.4B
| $1.5M | 0.07% |
61,943
+40,535
| +189% | +$873K |
|
267
Urban Outfitters
URBN
$6.24B
| $1.5M | 0.06% |
63,084
+49,403
| +361% | +$1.28M |
|
|
ABMD
268
DELISTED
Abiomed Inc
ABMD
| $1.5M | 0.06% |
11,963
+7,239
| +153% | +$839K |
|
269
Weibo
WB
$1.94B
| $1.48M | 0.06% |
+28,459
| New | +$1.42M |
|
270
CALL
Snap
SNAP
$7.59B
| $1.47M | 0.06% |
+6,186
| New | +$137K |
|
271
PUT
Biogen
BIIB
$29.8B
| $1.47M | 0.06% |
1,776
+661
| +59% | +$187K |
|
272
BP
BP
$112B
| $1.46M | 0.06% |
+48,427
| New | +$1.47M |
|
273
State Street Materials Select Sector SPDR ETF
XLB
$8.43B
| $1.46M | 0.06% |
+55,604
| New | +$1.44M |
|
|
DISH
274
DELISTED
DISH Network Corp.
DISH
| $1.46M | 0.06% |
22,920
+16,918
| +282% | +$1.05M |
|
275
iShares US Transportation ETF
IYT
$2.34B
| $1.45M | 0.06% |
+35,428
| New | +$1.47M |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.