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
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.52B
| $2.15M | 0.09% |
36,930
-8,080
| -18% | -$67.2K |
|
177
Sarepta Therapeutics
SRPT
$1.72B
| $2.1M | 0.09% |
46,396
+26,356
| +132% | +$1.05M |
|
|
PARA
178
DELISTED
Paramount Global Class B
PARA
| $2.1M | 0.09% |
+36,274
| New | +$2.29M |
|
179
BHP
BHP
$216B
| $2.1M | 0.09% |
58,063
+7,023
| +14% | +$257K |
|
|
UWC
180
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $2.07M | 0.08% |
1,297
+280
| +28% | +$448K |
|
181
Medtronic
MDT
$105B
| $2.05M | 0.08% |
+26,417
| New | +$2.19M |
|
182
Zoetis
ZTS
$31.5B
| $2.05M | 0.08% |
32,166
+23,369
| +266% | +$1.46M |
|
183
Albemarle
ALB
$14.3B
| $2.04M | 0.08% |
+14,990
| New | +$1.78M |
|
184
CALL
Union Pacific
UNP
$174B
| $2.04M | 0.08% |
4,063
+1,396
| +52% | +$150K |
|
|
X
185
DELISTED
US Steel
X
| $2.03M | 0.08% |
79,093
-439,895
| -85% | -$10.8M |
|
186
AbbVie
ABBV
$453B
| $2.02M | 0.08% |
22,796
-76,830
| -77% | -$5.85M |
|
|
NBIS
187
Nebius Group N.V.
NBIS
$56.5B
| $2.02M | 0.08% |
+61,482
| New | +$1.88M |
|
188
VanEck Gold Miners ETF
GDX
$23.6B
| $2.02M | 0.08% |
88,162
+61,917
| +236% | +$1.43M |
|
|
USG
189
DELISTED
Usg
USG
| $2.02M | 0.08% |
+61,988
| New | +$1.79M |
|
190
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $2.01M | 0.08% |
884
-242
| -21% | -$115K |
|
191
PUT
Under Armour Class C
UA
$3.04B
| $1.99M | 0.08% |
3,461
-1,470
| -30% | -$24.7K |
|
|
B
192
Barrick Mining
B
$62.8B
| $1.99M | 0.08% |
123,567
+105,595
| +588% | +$1.77M |
|
193
Lumentum
LITE
$64.9B
| $1.98M | 0.08% |
36,370
-265
| -0.7% | -$15.4K |
|
194
PUT
Bath & Body Works
BBWI
$4.07B
| $1.97M | 0.08% |
2,976
+1,614
| +119% | +$54.2K |
|
195
Broadcom
AVGO
$1.84T
| $1.96M | 0.08% |
+80,620
| New | +$1.99M |
|
|
196
CALL
VanEck Gold Miners ETF
GDX
$23.6B
| $1.95M | 0.08% |
11,189
-5,248
| -32% | -$121K |
|
197
Mettler-Toledo International
MTD
$26B
| $1.95M | 0.08% |
3,120
+414
| +15% | +$249K |
|
198
CALL
FedEx
FDX
$76.2B
| $1.95M | 0.08% |
1,419
-1,248
| -47% | -$266K |
|
199
CALL
Salesforce
CRM
$136B
| $1.94M | 0.08% |
3,979
+5
| +0.1% | +$460 |
|
|
200
CALL
AbbVie
ABBV
$453B
| $1.92M | 0.08% |
3,020
+960
| +47% | +$73.1K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.