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 | |
|---|---|---|---|---|---|---|
126
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $1.37M | 0.16% |
+2,345
| New | +$260K |
|
127
Amgen
AMGN
$198B
| $1.35M | 0.16% |
8,422
+8,030
| +2,048% | +$1.26M |
|
|
VXX
128
PUT
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $1.33M | 0.15% |
144
-186
| -56% | -$90.3K |
|
129
eBay
EBAY
$50.7B
| $1.31M | 0.15% |
54,163
+772
| +1% | +$18.4K |
|
130
CALL
Visa
V
$677B
| $1.31M | 0.15% |
3,434
-1,094
| -24% | -$72.3K |
|
131
Qorvo
QRVO
$7.85B
| $1.29M | 0.15% |
+16,252
| New | +$1.16M |
|
132
Boston Beer
SAM
$1.88B
| $1.27M | 0.15% |
+4,762
| New | +$1.38M |
|
|
JOY
133
DELISTED
Joy Global Inc
JOY
| $1.27M | 0.15% |
32,350
+27,210
| +529% | +$1.15M |
|
134
CALL
NXP Semiconductors
NXPI
$69B
| $1.27M | 0.15% |
+568
| New | +$50K |
|
135
PUT
United States Oil Fund
USO
$2.31B
| $1.26M | 0.15% |
+194
| New | +$27.9K |
|
136
PUT
IBM
IBM
$198B
| $1.23M | 0.14% |
1,118
-1,089
| -49% | -$165K |
|
137
Monster Beverage
MNST
$93.4B
| $1.22M | 0.14% |
+52,998
| New | +$1.11M |
|
138
PUT
ProShares UltraShort Health Care
RXD
$3.35M
| $1.22M | 0.14% |
+82
| New | +$18K |
|
|
PXD
139
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.21M | 0.14% |
7,410
-9,199
| -55% | -$1.41M |
|
|
TWTR
140
PUT
DELISTED
Twitter, Inc.
TWTR
| $1.2M | 0.14% |
3,159
-173
| -5% | -$7.67K |
|
|
SDRL
141
PUT
DELISTED
Seadrill Limited Common Stock
SDRL
| $1.19M | 0.14% |
5
-1
| -17% | -$2.9K |
|
|
142
PUT
Baidu
BIDU
$36.8B
| $1.19M | 0.14% |
+2,101
| New | +$450K |
|
143
PUT
Bank of America
BAC
$430B
| $1.18M | 0.14% |
+1,871
| New | +$30K |
|
|
WLL
144
PUT
DELISTED
Whiting Petroleum Corporation
WLL
| $1.18M | 0.14% |
6
| – | – |
|
145
FedEx
FDX
$73.1B
| $1.17M | 0.14% |
7,074
+2,866
| +68% | +$498K |
|
146
PUT
Procter & Gamble
PG
$345B
| $1.17M | 0.14% |
2,100
+1,312
| +166% | +$113K |
|
147
Wabtec
WAB
$44.7B
| $1.16M | 0.14% |
12,227
-874
| -7% | -$78.8K |
|
148
Diageo
DEO
$46.4B
| $1.15M | 0.13% |
10,401
+4,082
| +65% | +$470K |
|
149
Macerich
MAC
$7.27B
| $1.15M | 0.13% |
13,628
+13,422
| +6,516% | +$1.17M |
|
150
KLA
KLAC
$284B
| $1.12M | 0.13% |
192,500
+163,150
| +556% | +$1.04M |
|
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.