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 | |
|---|---|---|---|---|---|---|
|
WFM
201
DELISTED
Whole Foods Market Inc
WFM
| $2.06M | 0.09% |
69,271
+33,769
| +95% | +$1.02M |
|
|
X
202
CALL
DELISTED
US Steel
X
| $2.03M | 0.09% |
6,373
+536
| +9% | +$19K |
|
203
Ciena
CIEN
$57.9B
| $2.02M | 0.09% |
+85,398
| New | +$2.09M |
|
204
Crown Castle
CCI
$33.3B
| $2.01M | 0.09% |
21,301
-19,422
| -48% | -$1.74M |
|
|
PPLC
205
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $2.01M | 0.09% |
6,164
-3,210
| -34% | -$96.7K |
|
|
JWN
206
DELISTED
Nordstrom
JWN
| $2M | 0.09% |
43,063
+39,389
| +1,072% | +$1.76M |
|
207
PUT
Bath & Body Works
BBWI
$4.09B
| $1.99M | 0.09% |
2,159
+1,677
| +348% | +$75.6K |
|
208
First Solar
FSLR
$22.1B
| $1.99M | 0.09% |
+73,364
| New | +$2.41M |
|
209
PUT
JPMorgan Chase
JPM
$918B
| $1.99M | 0.09% |
11,569
+5,382
| +87% | +$475K |
|
210
Jack in the Box
JACK
$282M
| $1.99M | 0.09% |
19,518
+11,606
| +147% | +$1.2M |
|
211
PUT
Bank of America
BAC
$430B
| $1.94M | 0.08% |
17,126
+4,660
| +37% | +$111K |
|
212
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $1.94M | 0.08% |
15,334
+3,254
| +27% | +$214K |
|
213
UnitedHealth
UNH
$396B
| $1.93M | 0.08% |
+11,792
| New | +$1.93M |
|
214
Target
TGT
$63.4B
| $1.93M | 0.08% |
+34,940
| New | +$2.17M |
|
215
CALL
Boeing
BA
$161B
| $1.92M | 0.08% |
3,205
+1,491
| +87% | +$254K |
|
|
CAB
216
DELISTED
Cabela's Inc
CAB
| $1.89M | 0.08% |
35,528
+11,036
| +45% | +$566K |
|
217
Skyworks Solutions
SWKS
$9.47B
| $1.86M | 0.08% |
+18,994
| New | +$1.73M |
|
218
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $1.86M | 0.08% |
8,755
-558
| -6% | -$12.2K |
|
219
WIX.com
WIX
$2.14B
| $1.85M | 0.08% |
27,332
+24,885
| +1,017% | +$1.46M |
|
|
CELG
220
CALL
DELISTED
Celgene Corp
CELG
| $1.85M | 0.08% |
3,081
-599
| -16% | -$71.7K |
|
|
221
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $1.85M | 0.08% |
6,987
-3,078
| -31% | -$67.1K |
|
|
CTRA
222
DELISTED
Coterra Energy
CTRA
| $1.85M | 0.08% |
77,477
+30,588
| +65% | +$694K |
|
|
223
PUT
Citigroup
C
$223B
| $1.82M | 0.08% |
8,274
-2,873
| -26% | -$170K |
|
224
Radware
RDWR
$1.28B
| $1.78M | 0.08% |
110,460
+44,418
| +67% | +$683K |
|
|
MDCO
225
DELISTED
Medicines Co
MDCO
| $1.76M | 0.08% |
36,020
+29,396
| +444% | +$1.34M |
|
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.