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 |
Alphabet (Google) Class C
GOOG
|
+$40.1M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.5M |
| 3 |
Alibaba
BABA
|
+$10.5M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 5 |
Intel
INTC
|
+$9.83M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$35.7M |
| 2 |
Gilead Sciences
GILD
|
+$32.3M |
| 3 |
Amazon
AMZN
|
+$29M |
| 4 |
Booking.com
BKNG
|
+$28.4M |
| 5 |
Baidu
BIDU
|
+$13.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 7.76% |
| 2 | Consumer Discretionary | 7.62% |
| 3 | Healthcare | 7.24% |
| 4 | Technology | 6.95% |
| 5 | Financials | 4.83% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
EMC
151
DELISTED
EMC CORPORATION
EMC
| $1.12M | 0.13% |
43,824
-7,752
| -15% | -$214K |
|
152
CALL
Bausch Health
BHC
$1.75B
| $1.1M | 0.13% |
880
+372
| +73% | +$66K |
|
153
Palo Alto Networks
PANW
$279B
| $1.09M | 0.13% |
+44,964
| New | +$1.01M |
|
154
iShares MSCI Brazil ETF
EWZ
$9.02B
| $1.08M | 0.13% |
+34,371
| New | +$1.17M |
|
155
State Street Health Care Select Sector SPDR ETF
XLV
$41.5B
| $1.08M | 0.13% |
+14,857
| New | +$1.06M |
|
156
Kohl's
KSS
$1.99B
| $1.06M | 0.12% |
+13,558
| New | +$923K |
|
157
The Mosaic Company
MOS
$7.12B
| $1.06M | 0.12% |
22,978
+20,468
| +815% | +$999K |
|
|
KKD
158
DELISTED
KRISPY KREME DOUGHNUTS INC
KKD
| $1.06M | 0.12% |
52,870
-4,242
| -7% | -$86.3K |
|
159
PUT
ExxonMobil
XOM
$629B
| $1.04M | 0.12% |
2,964
+1,499
| +102% | +$133K |
|
160
PNC Financial Services
PNC
$99.8B
| $1.03M | 0.12% |
11,105
+8,165
| +278% | +$737K |
|
161
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $1.02M | 0.12% |
2,866
-3,137
| -52% | -$64K |
|
|
WWAV
162
DELISTED
The WhiteWave Foods Company
WWAV
| $1.01M | 0.12% |
+22,905
| New | +$875K |
|
163
First Solar
FSLR
$22.1B
| $978K | 0.11% |
16,369
-10,586
| -39% | -$544K |
|
|
164
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $970K | 0.11% |
+2,544
| New | +$374K |
|
165
CALL
BioMarin Pharmaceuticals
BMRN
$11.4B
| $969K | 0.11% |
367
+176
| +92% | +$18.6K |
|
166
Morgan Stanley
MS
$340B
| $968K | 0.11% |
27,136
+26,124
| +2,581% | +$937K |
|
167
CALL
Walt Disney
DIS
$167B
| $963K | 0.11% |
965
-2,653
| -73% | -$268K |
|
168
Travelers Companies
TRV
$81.3B
| $962K | 0.11% |
+8,898
| New | +$950K |
|
169
PUT
Petrobras
PBR
$119B
| $948K | 0.11% |
2,128
-396
| -16% | -$2.52K |
|
170
Northrop Grumman
NOC
$74.4B
| $945K | 0.11% |
+5,876
| New | +$939K |
|
|
PCP
171
DELISTED
PRECISION CASTPARTS CORP
PCP
| $942K | 0.11% |
+4,487
| New | +$952K |
|
|
QIHU
172
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $940K | 0.11% |
18,365
+7,030
| +62% | +$381K |
|
|
X
173
PUT
DELISTED
US Steel
X
| $936K | 0.11% |
1,604
-509
| -24% | -$12.1K |
|
|
SCTY
174
PUT
DELISTED
SolarCity Corporation
SCTY
| $929K | 0.11% |
996
-191
| -16% | -$9.81K |
|
|
CS
175
DELISTED
Credit Suisse Group
CS
| $928K | 0.11% |
34,474
+24,798
| +256% | +$591K |
|
Similar funds
Simplex Trading's Q1 2015 Portfolio in Review
As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.
By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
- Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
- Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
- Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
- Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
- Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
- Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.
Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.