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
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
101
Trip.com Group
TCOM
$27.5B
| $1.95M | 0.16% |
53,692
+4,284
| +9% | +$150K |
|
|
CBI
102
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
| $1.94M | 0.16% |
1,859
+526
| +39% | +$27.4K |
|
103
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $1.88M | 0.16% |
10,814
+2,214
| +26% | +$115K |
|
|
BRCM
104
DELISTED
BROADCOM CORP CL-A
BRCM
| $1.86M | 0.16% |
+36,202
| New | +$1.76M |
|
105
Mastercard
MA
$476B
| $1.86M | 0.16% |
+19,902
| New | +$1.83M |
|
|
106
PUT
IBM
IBM
$198B
| $1.85M | 0.16% |
3,065
+1,947
| +174% | +$313K |
|
107
AbbVie
ABBV
$452B
| $1.84M | 0.15% |
27,351
-35,660
| -57% | -$2.33M |
|
|
WWAV
108
DELISTED
The WhiteWave Foods Company
WWAV
| $1.81M | 0.15% |
37,015
+14,110
| +62% | +$661K |
|
109
CALL
Ambarella
AMBA
$3.13B
| $1.79M | 0.15% |
1,230
+847
| +221% | +$74K |
|
110
Whirlpool
WHR
$2.36B
| $1.78M | 0.15% |
+10,300
| New | +$1.93M |
|
|
INFA
111
DELISTED
INFORMATICA CORP
INFA
| $1.78M | 0.15% |
36,782
+24,749
| +206% | +$1.19M |
|
|
TYNS
112
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $1.78M | 0.15% |
4,312
+865
| +25% | +$26.2K |
|
|
PXD
113
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.76M | 0.15% |
12,719
+5,309
| +72% | +$842K |
|
114
Constellation Brands
STZ
$22.3B
| $1.75M | 0.15% |
15,131
+12,985
| +605% | +$1.53M |
|
|
APC
115
DELISTED
Anadarko Petroleum
APC
| $1.73M | 0.15% |
22,185
-27,065
| -55% | -$2.34M |
|
116
PUT
American Airlines Group
AAL
$10.1B
| $1.72M | 0.14% |
2,988
+477
| +19% | +$21.8K |
|
117
NetEase
NTES
$82.9B
| $1.71M | 0.14% |
59,070
+46,220
| +360% | +$1.23M |
|
|
VIAB
118
DELISTED
Viacom Inc. Class B
VIAB
| $1.7M | 0.14% |
26,366
+21,015
| +393% | +$1.42M |
|
119
PUT
Transocean
RIG
$5.8B
| $1.7M | 0.14% |
2,830
+727
| +35% | +$13.1K |
|
|
GMCR
120
PUT
DELISTED
KEURIG GREEN MTN INC
GMCR
| $1.69M | 0.14% |
738
-207
| -22% | -$20.3K |
|
121
State Street Health Care Select Sector SPDR ETF
XLV
$41.5B
| $1.69M | 0.14% |
22,668
+7,811
| +53% | +$579K |
|
122
The Mosaic Company
MOS
$6.98B
| $1.68M | 0.14% |
35,956
+12,978
| +56% | +$589K |
|
|
VMW
123
DELISTED
VMware, Inc
VMW
| $1.68M | 0.14% |
19,586
-6,660
| -25% | -$581K |
|
124
3M
MMM
$89.1B
| $1.67M | 0.14% |
12,941
-508
| -4% | -$68.1K |
|
125
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $1.66M | 0.14% |
29,560
-69,390
| -70% | -$233K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.