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 | |
|---|---|---|---|---|---|---|
1551
Applied Optoelectronics
AAOI
$8.04B
| $60K | 0.01% |
3,512
+3,432
| +4,290% | +$54.8K |
|
1552
CALL
American Express
AXP
$223B
| $60K | 0.01% |
1,079
-524
| -33% | -$41.6K |
|
1553
iShares MSCI EAFE Growth ETF
EFG
$16.3B
| $60K | 0.01% |
+870
| New | +$63.2K |
|
1554
CALL
Energy Transfer Partners
ET
$70.1B
| $60K | 0.01% |
344
+186
| +118% | +$6.23K |
|
1555
CALL
Edwards Lifesciences
EW
$47.6B
| $60K | 0.01% |
540
+336
| +165% | +$7.58K |
|
|
GTLS
1556
DELISTED
Chart Industries
GTLS
| $60K | 0.01% |
1,702
-1,850
| -52% | -$67.8K |
|
1557
PUT
HSBC
HSBC
$355B
| $60K | 0.01% |
262
+179
| +216% | +$7.46K |
|
1558
CALL
Kohl's
KSS
$2.03B
| $60K | 0.01% |
301
-6
| -2% | -$417 |
|
1559
LKQ Corp
LKQ
$6.58B
| $60K | 0.01% |
2,011
-1,214
| -38% | -$33.7K |
|
1560
CALL
SM Energy
SM
$7.96B
| $60K | 0.01% |
195
+15
| +8% | +$791 |
|
1561
PUT
Southern Company
SO
$110B
| $60K | 0.01% |
268
+74
| +38% | +$3.22K |
|
1562
CALL
Walmart Inc
WMT
$871B
| $60K | 0.01% |
1,443
-1,533
| -52% | -$39.1K |
|
|
AIFU
1563
AIFU Inc
AIFU
$201M
| $60K | 0.01% |
+17
| New | +$64.6K |
|
|
SPWR
1564
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $60K | 0.01% |
208
+95
| +84% | +$2K |
|
|
WFM
1565
CALL
DELISTED
Whole Foods Market Inc
WFM
| $60K | 0.01% |
307
-435
| -59% | -$19.5K |
|
1566
PUT
Banco Macro
BMA
$5.7B
| $59K | ﹤0.01% |
147
+122
| +488% | +$6.47K |
|
1567
PUT
Canadian Solar
CSIQ
$906M
| $59K | ﹤0.01% |
211
-32
| -13% | -$1.1K |
|
1568
PUT
GameStop
GME
$9.5B
| $59K | ﹤0.01% |
1,356
-748
| -36% | -$7.69K |
|
1569
Globus Medical
GMED
$10.4B
| $59K | ﹤0.01% |
2,335
+1,019
| +77% | +$25.8K |
|
1570
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $59K | ﹤0.01% |
2,530
+1,598
| +171% | +$68.7K |
|
1571
CALL
Myriad Genetics
MYGN
$530M
| $59K | ﹤0.01% |
274
+208
| +315% | +$7.07K |
|
1572
Natural Resource Partners
NRP
$1.3B
| $59K | ﹤0.01% |
1,572
+1,214
| +339% | +$61K |
|
1573
PUT
Oil States International
OIS
$522M
| $59K | ﹤0.01% |
131
+127
| +3,175% | +$5.34K |
|
1574
Option Care Health
OPCH
$3.4B
| $59K | ﹤0.01% |
+4,119
| New | +$69.7K |
|
1575
TC Energy
TRP
$73.5B
| $59K | ﹤0.01% |
1,457
-286
| -16% | -$12.6K |
|
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.