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 | |
|---|---|---|---|---|---|---|
|
RICE
1026
DELISTED
Rice Energy Inc.
RICE
| $135K | 0.01% |
6,489
+4,195
| +183% | +$95.3K |
|
|
SNDK
1027
DELISTED
SANDISK CORP
SNDK
| $135K | 0.01% |
2,323
-22,845
| -91% | -$1.53M |
|
1028
PUT
GE Aerospace
GE
$362B
| $134K | 0.01% |
235
+118
| +101% | +$15.3K |
|
1029
MGM Resorts International
MGM
$11.5B
| $134K | 0.01% |
7,359
-4,105
| -36% | -$83.4K |
|
1030
WEX
WEX
$5.94B
| $134K | 0.01% |
+1,183
| New | +$134K |
|
|
RDUS
1031
CALL
DELISTED
Radius Health, Inc.
RDUS
| $134K | 0.01% |
+204
| New | +$9.5K |
|
1032
Cencora
COR
$59.4B
| $133K | 0.01% |
+1,254
| New | +$141K |
|
1033
Helix Energy Solutions
HLX
$1.43B
| $133K | 0.01% |
10,577
-2,200
| -17% | -$34.7K |
|
1034
CALL
Intuit
INTU
$77B
| $133K | 0.01% |
347
+184
| +113% | +$18.8K |
|
1035
CALL
Jazz Pharmaceuticals
JAZZ
$16B
| $133K | 0.01% |
117
-29
| -20% | -$5.21K |
|
1036
CALL
Merck
MRK
$322B
| $133K | 0.01% |
525
-375
| -42% | -$21K |
|
|
SUNE
1037
PUT
DELISTED
SUNEDISON, INC COM
SUNE
| $133K | 0.01% |
797
-479
| -38% | -$13.6K |
|
|
GRMN
1038
PUT
Garmin
GRMN
$46.3B
| $132K | 0.01% |
140
+62
| +79% | +$2.86K |
|
1039
Mattel
MAT
$4.14B
| $132K | 0.01% |
5,151
+5,097
| +9,439% | +$134K |
|
1040
ServiceNow
NOW
$94.8B
| $132K | 0.01% |
+8,890
| New | +$137K |
|
|
IMGN
1041
CALL
DELISTED
Immunogen Inc
IMGN
| $132K | 0.01% |
221
+150
| +211% | +$1.65K |
|
|
APU
1042
DELISTED
AmeriGas Partners, L.P.
APU
| $132K | 0.01% |
2,906
+2,384
| +457% | +$115K |
|
|
TWX
1043
CALL
DELISTED
Time Warner Inc
TWX
| $132K | 0.01% |
261
-93
| -26% | -$7.94K |
|
|
MON
1044
CALL
DELISTED
Monsanto Co
MON
| $132K | 0.01% |
1,149
+495
| +76% | +$57.4K |
|
1045
CALL
Neurocrine Biosciences
NBIX
$17.5B
| $131K | 0.01% |
193
+67
| +53% | +$2.84K |
|
1046
PUT
Plains All American Pipeline
PAA
$17.4B
| $131K | 0.01% |
271
+227
| +516% | +$10.9K |
|
1047
ProShares VIX Mid-Term Futures ETF
VIXM
$40.1M
| $131K | 0.01% |
2,424
+2,376
| +4,950% | +$134K |
|
|
MIC
1048
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $131K | 0.01% |
1,586
+1,322
| +501% | +$112K |
|
|
ATVI
1049
CALL
DELISTED
Activision Blizzard
ATVI
| $131K | 0.01% |
205
-177
| -46% | -$4.32K |
|
1050
PUT
Deutsche Bank
DB
$65.3B
| $130K | 0.01% |
265
+126
| +91% | +$3.66K |
|
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.