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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2301
Becton Dickinson
BDX
$43.1B
| $674K | ﹤0.01% |
2,648
+504
| +24% | +$124K |
|
2302
PUT
Ecolab
ECL
$75.6B
| $674K | ﹤0.01% |
43
+36
| +514% | +$5.34K |
|
|
DMC
2303
CALL
Del Monte Corp
DMC
$1.35B
| $674K | ﹤0.01% |
199
+196
| +6,533% | +$7.67K |
|
2304
PUT
Scotiabank
BNS
$106B
| $673K | ﹤0.01% |
113
+52
| +85% | +$3.04K |
|
|
PTLA
2305
PUT
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $673K | ﹤0.01% |
253
+8
| +3% | +$261 |
|
|
OPTU
2306
PUT
Optimum Communications Inc
OPTU
$316M
| $672K | ﹤0.01% |
371
-166
| -31% | -$2.97K |
|
2307
CALL
iRhythm Holdings
IRTC
$3.59B
| $672K | ﹤0.01% |
71
+62
| +689% | +$5.4K |
|
2308
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $672K | ﹤0.01% |
70
+9
| +15% | +$718 |
|
2309
CALL
Wheaton Precious Metals
WPM
$50.6B
| $672K | ﹤0.01% |
384
+284
| +284% | +$5.45K |
|
2310
Cognizant
CTSH
$21.5B
| $670K | ﹤0.01% |
8,695
-7,604
| -47% | -$595K |
|
2311
CALL
Monster Beverage
MNST
$91.4B
| $670K | ﹤0.01% |
230
+122
| +113% | +$3.67K |
|
2312
CALL
CareDx
CDNA
$1.92B
| $669K | ﹤0.01% |
+232
| New | +$4.34K |
|
2313
Ligand Pharmaceuticals
LGND
$6.02B
| $669K | ﹤0.01% |
3,908
+734
| +23% | +$111K |
|
2314
CALL
Autoliv
ALV
$8.6B
| $667K | ﹤0.01% |
+77
| New | +$7.34K |
|
2315
CALL
Marten Transport
MRTN
$1.33B
| $667K | ﹤0.01% |
476
+450
| +1,731% | +$6.7K |
|
2316
PUT
Urban Outfitters
URBN
$5.99B
| $666K | ﹤0.01% |
163
-134
| -45% | -$6.02K |
|
2317
CALL
Cooper Companies
COO
$13.7B
| $665K | ﹤0.01% |
96
| – | – |
|
|
CHL
2318
PUT
DELISTED
China Mobile Limited
CHL
| $665K | ﹤0.01% |
136
-64
| -32% | -$2.96K |
|
2319
PUT
FMC
FMC
$1.42B
| $662K | ﹤0.01% |
88
-42
| -32% | -$3.16K |
|
2320
PUT
Kennametal
KMT
$2.68B
| $662K | ﹤0.01% |
152
+46
| +43% | +$1.82K |
|
|
BIG
2321
DELISTED
Big Lots, Inc.
BIG
| $662K | ﹤0.01% |
+15,851
| New | +$699K |
|
2322
PUT
Ingredion
INGR
$6.38B
| $661K | ﹤0.01% |
63
-57
| -48% | -$5.82K |
|
2323
PUT
3D Systems Corp
DDD
$420M
| $659K | ﹤0.01% |
349
-406
| -54% | -$7K |
|
2324
PUT
NETSCOUT
NTCT
$2.86B
| $659K | ﹤0.01% |
261
+184
| +239% | +$4.97K |
|
2325
Extreme Networks
EXTR
$3.86B
| $658K | ﹤0.01% |
120,217
+61,548
| +105% | +$436K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.