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 | |
|---|---|---|---|---|---|---|
2826
PUT
Bloomin' Brands
BLMN
$707M
| $13K | ﹤0.01% |
+101
| New | +$2.27K |
|
2827
Badger Meter
BMI
$3.75B
| $13K | ﹤0.01% |
432
+372
| +620% | +$11.7K |
|
2828
PUT
United States Brent Oil Fund
BNO
$768M
| $13K | ﹤0.01% |
143
+123
| +615% | +$2.83K |
|
2829
PUT
Cameco
CCJ
$39.6B
| $13K | ﹤0.01% |
67
+17
| +34% | +$268 |
|
2830
Cytokinetics
CYTK
$11B
| $13K | ﹤0.01% |
1,939
+51
| +3% | +$334 |
|
2831
PUT
Digital Realty Trust
DLR
$72.6B
| $13K | ﹤0.01% |
17
-33
| -66% | -$2.17K |
|
2832
PUT
Dycom Industries
DY
$12.7B
| $13K | ﹤0.01% |
+109
| New | +$5.77K |
|
2833
Vaalco Energy
EGY
$573M
| $13K | ﹤0.01% |
+6,254
| New | +$14.6K |
|
2834
FuelCell Energy
FCEL
$1.69B
| $13K | ﹤0.01% |
+3
| New | +$15.5K |
|
2835
Intercontinental Exchange
ICE
$83.1B
| $13K | ﹤0.01% |
300
-5,265
| -95% | -$244K |
|
2836
Innoviva
INVA
$1.59B
| $13K | ﹤0.01% |
743
+608
| +450% | +$10.4K |
|
2837
US Global Jets ETF
JETS
$765M
| $13K | ﹤0.01% |
+596
| New | +$14K |
|
2838
PUT
Kulicke & Soffa
KLIC
$5.26B
| $13K | ﹤0.01% |
+41
| New | +$570 |
|
2839
Kodak
KODK
$802M
| $13K | ﹤0.01% |
829
-639
| -44% | -$12.1K |
|
2840
PUT
Karyopharm Therapeutics
KPTI
$176M
| $13K | ﹤0.01% |
+2
| New | +$864 |
|
2841
CALL
Lands' End
LE
$375M
| $13K | ﹤0.01% |
66
+45
| +214% | +$1.29K |
|
2842
La-Z-Boy
LZB
$1.61B
| $13K | ﹤0.01% |
517
+497
| +2,485% | +$13.4K |
|
2843
CALL
Mattel
MAT
$4.23B
| $13K | ﹤0.01% |
239
+219
| +1,095% | +$5.77K |
|
2844
CALL
M&T Bank
MTB
$36.3B
| $13K | ﹤0.01% |
66
+48
| +267% | +$5.91K |
|
2845
Mitsubishi UFJ Financial
MUFG
$261B
| $13K | ﹤0.01% |
+1,825
| New | +$13K |
|
2846
PUT
Neurocrine Biosciences
NBIX
$17.9B
| $13K | ﹤0.01% |
52
-43
| -45% | -$1.82K |
|
2847
CALL
Nabors Industries
NBR
$1.21B
| $13K | ﹤0.01% |
+3
| New | +$2.26K |
|
2848
Insulet
PODD
$11.6B
| $13K | ﹤0.01% |
+425
| New | +$12.5K |
|
2849
PUT
Restaurant Brands International
QSR
$25.4B
| $13K | ﹤0.01% |
93
-345
| -79% | -$13.6K |
|
|
SAGE
2850
CALL
DELISTED
Sage Therapeutics
SAGE
| $13K | ﹤0.01% |
+22
| New | +$1.41K |
|
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.