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 | |
|---|---|---|---|---|---|---|
1276
PUT
Synchrony
SYF
$23.7B
| $111K | 0.01% |
1,785
+1,524
| +584% | +$47.7K |
|
|
KING
1277
CALL
DELISTED
KING DIGITAL ENTMT PLC ORD SHS (IRL)
KING
| $111K | 0.01% |
346
+47
| +16% | +$783 |
|
1278
TG Therapeutics
TGTX
$8.58B
| $110K | 0.01% |
9,260
+7,088
| +326% | +$89.5K |
|
|
ALXN
1279
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $110K | 0.01% |
262
-356
| -58% | -$62.2K |
|
|
HAR
1280
PUT
DELISTED
Harman International Industries
HAR
| $110K | 0.01% |
213
+142
| +200% | +$14.4K |
|
1281
Xtrackers Harvest CSI 500 China A-Shares Small Cap ETF
ASHS
$32.6M
| $109K | 0.01% |
+2,634
| New | +$114K |
|
|
VISN
1282
Vistance Networks Inc
VISN
$2.66B
| $109K | 0.01% |
+4,213
| New | +$121K |
|
1283
PUT
PepsiCo
PEP
$186B
| $109K | 0.01% |
421
-449
| -52% | -$44.8K |
|
|
XONE
1284
PUT
DELISTED
The ExOne Company
XONE
| $109K | 0.01% |
64
+44
| +220% | +$425 |
|
|
QIWI
1285
DELISTED
QIWI PLC
QIWI
| $109K | 0.01% |
6,091
+5,885
| +2,857% | +$108K |
|
|
EXAS
1286
PUT
DELISTED
Exact Sciences
EXAS
| $108K | 0.01% |
102
+34
| +50% | +$316 |
|
1287
Pricesmart
PSMT
$5.75B
| $108K | 0.01% |
1,303
+899
| +223% | +$78K |
|
1288
CALL
RTX Corp
RTX
$287B
| $108K | 0.01% |
953
-504
| -35% | -$30.5K |
|
|
ELLI
1289
CALL
DELISTED
Ellie Mae Inc
ELLI
| $108K | 0.01% |
387
+296
| +325% | +$19.4K |
|
1290
A.O. Smith
AOS
$8.38B
| $107K | 0.01% |
+2,794
| New | +$105K |
|
1291
BCE
BCE
$19.9B
| $107K | 0.01% |
+2,775
| New | +$117K |
|
1292
PUT
Southwest Airlines
LUV
$22.1B
| $107K | 0.01% |
237
-166
| -41% | -$7.35K |
|
1293
CALL
ServiceNow
NOW
$102B
| $107K | 0.01% |
2,700
+1,660
| +160% | +$27.4K |
|
1294
PPG Industries
PPG
$25.9B
| $107K | 0.01% |
1,090
-5,083
| -82% | -$513K |
|
1295
CALL
Sunoco
SUN
$14.2B
| $107K | 0.01% |
+266
| New | +$9.58K |
|
1296
PUT
Voya Financial
VOYA
$8.94B
| $107K | 0.01% |
61
+57
| +1,425% | +$2.26K |
|
1297
Barclays
BCS
$94.1B
| $106K | 0.01% |
8,801
+6,949
| +375% | +$92.2K |
|
1298
Equinor
EQNR
$95.9B
| $106K | 0.01% |
7,627
+6,844
| +874% | +$107K |
|
1299
PUT
Element Solutions
ESI
$9.12B
| $106K | 0.01% |
217
-494
| -69% | -$6.01K |
|
1300
CALL
Halozyme
HALO
$9.72B
| $106K | 0.01% |
344
+243
| +241% | +$3.87K |
|
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.