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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
151
PUT
American Express
AXP
$238B
| $31.9M | 0.09% |
2,701
+848
| +46% | +$104K |
|
152
CALL
Wells Fargo
WFC
$262B
| $31.4M | 0.09% |
6,234
+1,022
| +20% | +$48.1K |
|
153
CALL
Citigroup
C
$223B
| $31.3M | 0.09% |
4,538
-1,209
| -21% | -$82.2K |
|
154
CALL
iShares Silver Trust
SLV
$28.9B
| $31.3M | 0.09% |
19,653
+8,033
| +69% | +$128K |
|
155
CALL
Ulta Beauty
ULTA
$20.8B
| $31.2M | 0.09% |
1,246
+965
| +343% | +$296K |
|
156
CALL
Twilio
TWLO
$27.9B
| $31M | 0.09% |
2,818
+1,351
| +92% | +$175K |
|
157
PUT
Qualcomm
QCOM
$186B
| $30.7M | 0.09% |
4,025
-8,249
| -67% | -$621K |
|
|
XLNX
158
CALL
DELISTED
Xilinx Inc
XLNX
| $30.5M | 0.09% |
3,185
+775
| +32% | +$84.8K |
|
159
CALL
Starbucks
SBUX
$119B
| $30.5M | 0.09% |
3,453
+603
| +21% | +$55.9K |
|
160
CALL
Deere & Co
DE
$164B
| $30.4M | 0.09% |
1,801
+617
| +52% | +$98.7K |
|
161
CALL
Bank of America
BAC
$434B
| $30.2M | 0.09% |
10,365
-5,845
| -36% | -$168K |
|
162
PUT
NXP Semiconductors
NXPI
$70.3B
| $30M | 0.09% |
2,750
+36
| +1% | +$3.68K |
|
|
TWTR
163
PUT
DELISTED
Twitter, Inc.
TWTR
| $30M | 0.09% |
7,274
+429
| +6% | +$17.5K |
|
|
164
Boeing
BA
$164B
| $29.8M | 0.08% |
78,444
+67,929
| +646% | +$24.3M |
|
165
CALL
Lowe's Companies
LOW
$114B
| $29.8M | 0.08% |
2,706
+334
| +14% | +$35.3K |
|
166
PUT
Bristol-Myers Squibb
BMY
$124B
| $29.7M | 0.08% |
5,852
-460
| -7% | -$21.6K |
|
|
AABA
167
PUT
DELISTED
Altaba Inc
AABA
| $29.6M | 0.08% |
1,769
-3,814
| -68% | -$252K |
|
168
CALL
United Airlines
UAL
$38.2B
| $29.4M | 0.08% |
3,330
+1,508
| +83% | +$133K |
|
169
PUT
Target
TGT
$62.8B
| $29.3M | 0.08% |
2,740
+159
| +6% | +$15.1K |
|
|
ATVI
170
PUT
DELISTED
Activision Blizzard
ATVI
| $29.2M | 0.08% |
5,514
+856
| +18% | +$42.7K |
|
|
UWC
171
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $29M | 0.08% |
4,489
+874
| +24% | +$5.65M |
|
172
CALL
Lockheed Martin
LMT
$119B
| $28.5M | 0.08% |
730
+130
| +22% | +$48.9K |
|
173
PUT
3M
MMM
$89.3B
| $28.5M | 0.08% |
2,070
-1,579
| -43% | -$221K |
|
174
CALL
Intel
INTC
$526B
| $28.4M | 0.08% |
5,517
-329
| -6% | -$16.2K |
|
|
175
PUT
Intel
INTC
$526B
| $28.4M | 0.08% |
5,510
+864
| +19% | +$42.5K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.