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 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 9.5% |
| 2 | Healthcare | 7.55% |
| 3 | Technology | 7.01% |
| 4 | Communication Services | 6.66% |
| 5 | Industrials | 5.76% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2226
PUT
Alliance Resource Partners
ARLP
$3.18B
| $34K | ﹤0.01% |
30
+1
| +3% | +$19 |
|
2227
American Express
AXP
$223B
| $34K | ﹤0.01% |
500
-47,925
| -99% | -$3.49M |
|
2228
PUT
Ball Corp
BALL
$17B
| $34K | ﹤0.01% |
522
+474
| +988% | +$16.2K |
|
2229
CALL
Best Buy
BBY
$18B
| $34K | ﹤0.01% |
331
-197
| -37% | -$6.52K |
|
2230
BorgWarner
BWA
$13.2B
| $34K | ﹤0.01% |
899
+615
| +217% | +$23.1K |
|
2231
CALL
Crown Castle
CCI
$32.7B
| $34K | ﹤0.01% |
178
+1
| +0.6% | +$85 |
|
2232
PUT
CME Group
CME
$92.2B
| $34K | ﹤0.01% |
219
-18
| -8% | -$1.69K |
|
2233
CALL
Camden Property Trust
CPT
$11.3B
| $34K | ﹤0.01% |
+30
| New | +$2.29K |
|
2234
CALL
CSX Corp
CSX
$98.6B
| $34K | ﹤0.01% |
4,614
+4,368
| +1,776% | +$39.7K |
|
2235
China Yuchai International
CYD
$1.69B
| $34K | ﹤0.01% |
3,239
+1,728
| +114% | +$21K |
|
|
DHC
2236
PUT
Diversified Healthcare Trust
DHC
$2.26B
| $34K | ﹤0.01% |
302
-13
| -4% | -$194 |
|
2237
CALL
Edwards Lifesciences
EW
$47.6B
| $34K | ﹤0.01% |
645
-807
| -56% | -$21K |
|
2238
iShares MSCI France ETF
EWQ
$324M
| $34K | ﹤0.01% |
1,424
+289
| +25% | +$7.27K |
|
2239
Extreme Networks
EXTR
$3.86B
| $34K | ﹤0.01% |
8,422
+7,640
| +977% | +$29.6K |
|
2240
CALL
Diamondback Energy
FANG
$57.6B
| $34K | ﹤0.01% |
277
-187
| -40% | -$13.9K |
|
2241
CALL
Golar LNG
GLNG
$4.95B
| $34K | ﹤0.01% |
372
+154
| +71% | +$3.93K |
|
2242
PUT
Hilton Worldwide
HLT
$74B
| $34K | ﹤0.01% |
243
+189
| +350% | +$13.4K |
|
2243
iShares US Regional Banks ETF
IAT
$685M
| $34K | ﹤0.01% |
990
-992
| -50% | -$35K |
|
2244
Immunic
IMUX
$182M
| $34K | ﹤0.01% |
+7
| New | +$22.8K |
|
2245
Old Republic International
ORI
$10.3B
| $34K | ﹤0.01% |
+1,840
| New | +$33.1K |
|
2246
Rambus
RMBS
$10.4B
| $34K | ﹤0.01% |
2,937
-3,051
| -51% | -$35.2K |
|
2247
PUT
Teekay
TK
$975M
| $34K | ﹤0.01% |
87
+41
| +89% | +$1.07K |
|
2248
CALL
Take-Two Interactive
TTWO
$43B
| $34K | ﹤0.01% |
33
+8
| +32% | +$270 |
|
2249
Vanguard Mid-Cap Growth ETF
VOT
$19B
| $34K | ﹤0.01% |
346
-907
| -72% | -$91.9K |
|
2250
PUT
Weyerhaeuser
WY
$17.3B
| $34K | ﹤0.01% |
198
+64
| +48% | +$1.93K |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading's Q4 2015 filing shows 1,417 new, 1,993 increased, 1,803 reduced and 1,598 closed positions. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M. The largest sale was iShares Russell 2000 ETF, an estimated $27.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 9.5% of assets, up from 4.6% a quarter earlier, followed by Healthcare and Technology.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,417 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.