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 | |
|---|---|---|---|---|---|---|
3051
PUT
Greif
GEF
$4.56B
| $10K | ﹤0.01% |
17
+11
| +183% | +$437 |
|
|
GES
3052
PUT
DELISTED
Guess Inc
GES
| $10K | ﹤0.01% |
21
-289
| -93% | -$5.43K |
|
3053
PUT
Corning
GLW
$123B
| $10K | ﹤0.01% |
44
-114
| -72% | -$2.44K |
|
|
HBI
3054
CALL
DELISTED
Hanesbrands
HBI
| $10K | ﹤0.01% |
48
-132
| -73% | -$4.32K |
|
3055
PUT
Huntington Ingalls Industries
HII
$11.4B
| $10K | ﹤0.01% |
+20
| New | +$2.54K |
|
3056
Innospec
IOSP
$2.11B
| $10K | ﹤0.01% |
+228
| New | +$10.2K |
|
|
JNPR
3057
PUT
DELISTED
Juniper Networks
JNPR
| $10K | ﹤0.01% |
+35
| New | +$919 |
|
3058
CALL
Kratos Defense & Security Solutions
KTOS
$9.27B
| $10K | ﹤0.01% |
+80
| New | +$475 |
|
3059
Leggett & Platt
LEG
$1.5B
| $10K | ﹤0.01% |
+222
| New | +$10.4K |
|
3060
PUT
Lennar Class B
LEN.B
$20.1B
| $10K | ﹤0.01% |
92
+43
| +88% | +$1.57K |
|
3061
National Fuel Gas
NFG
$7.67B
| $10K | ﹤0.01% |
+181
| New | +$11.4K |
|
3062
CALL
Northrop Grumman
NOC
$77.8B
| $10K | ﹤0.01% |
8
-49
| -86% | -$7.84K |
|
3063
Perion Network
PERI
$371M
| $10K | ﹤0.01% |
1,200
+254
| +27% | +$2.65K |
|
3064
Power Integrations
POWI
$3.53B
| $10K | ﹤0.01% |
472
-1,680
| -78% | -$42K |
|
3065
CALL
Pilgrim's Pride
PPC
$6.94B
| $10K | ﹤0.01% |
128
-98
| -43% | -$2.42K |
|
|
PPL
3066
CALL
PPL Corp
PPL
$27.1B
| $10K | ﹤0.01% |
259
-20
| -7% | -$625 |
|
3067
PUT
Ryder
R
$10.3B
| $10K | ﹤0.01% |
42
+20
| +91% | +$1.89K |
|
|
SGMO
3068
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $10K | ﹤0.01% |
154
+45
| +41% | +$580 |
|
|
NSLR
3069
CALL
Neostellar Capital Corp
NSLR
$270M
| $10K | ﹤0.01% |
63
+32
| +103% | +$212 |
|
3070
Sensata Technologies
ST
$6.75B
| $10K | ﹤0.01% |
198
-3,339
| -94% | -$187K |
|
3071
CALL
Synchrony
SYF
$24.5B
| $10K | ﹤0.01% |
+33
| New | +$1.05K |
|
3072
Telephone and Data Systems
TDS
$3.83B
| $10K | ﹤0.01% |
361
+352
| +3,911% | +$10.1K |
|
3073
PUT
Teekay
TK
$974M
| $10K | ﹤0.01% |
55
-12
| -18% | -$568 |
|
3074
CALL
Visteon
VC
$2.82B
| $10K | ﹤0.01% |
+175
| New | +$18.4K |
|
3075
PUT
Veeco
VECO
$2.96B
| $10K | ﹤0.01% |
15
-12
| -44% | -$368 |
|
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.