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 | |
|---|---|---|---|---|---|---|
251
CALL
Delta Air Lines
DAL
$55.5B
| $15.2M | 0.05% |
2,626
+339
| +15% | +$18.7K |
|
|
ETFC
252
CALL
DELISTED
E*Trade Financial Corporation
ETFC
| $15.1M | 0.05% |
2,878
+2,655
| +1,191% | +$156K |
|
253
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $15.1M | 0.05% |
1,356
+723
| +114% | +$80.6K |
|
254
PUT
Kraft Heinz
KHC
$30.9B
| $15M | 0.05% |
2,728
-434
| -14% | -$25.9K |
|
255
CALL
General Motors
GM
$74.8B
| $15M | 0.05% |
4,465
+426
| +11% | +$15.7K |
|
256
CALL
ConocoPhillips
COP
$145B
| $14.9M | 0.05% |
1,924
+413
| +27% | +$29.8K |
|
257
CALL
Colgate-Palmolive
CL
$73.4B
| $14.9M | 0.05% |
2,223
-196
| -8% | -$13.1K |
|
258
CALL
W.W. Grainger
GWW
$63.8B
| $14.8M | 0.05% |
415
+348
| +519% | +$120K |
|
259
Alphabet (Google) Class A
GOOGL
$4.24T
| $14.8M | 0.05% |
244,900
-73,440
| -23% | -$4.45M |
|
260
PUT
Mondelez International
MDLZ
$77.6B
| $14.8M | 0.05% |
3,440
+76
| +2% | +$3.24K |
|
261
PUT
Comcast
CMCSA
$85.2B
| $14.7M | 0.05% |
4,143
-1,223
| -23% | -$43.3K |
|
262
CALL
ServiceNow
NOW
$99.7B
| $14.7M | 0.05% |
3,745
-410
| -10% | -$15.5K |
|
263
CALL
Trade Desk
TTD
$8.39B
| $14.5M | 0.05% |
9,630
+5,780
| +150% | +$68.6K |
|
264
Union Pacific
UNP
$174B
| $14.5M | 0.05% |
89,087
+43,563
| +96% | +$6.56M |
|
265
PUT
Take-Two Interactive
TTWO
$43.3B
| $14.4M | 0.05% |
1,047
+145
| +16% | +$18.5K |
|
266
PUT
Autodesk
ADSK
$43.2B
| $14.3M | 0.05% |
917
+369
| +67% | +$52.1K |
|
267
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.64B
| $14.3M | 0.05% |
19,780
+6,560
| +50% | +$102K |
|
268
PUT
ProShares UltraShort Health Care
RXD
$3.35M
| $14.2M | 0.05% |
955
-65
| -6% | -$6.1K |
|
269
PUT
Applied Materials
AMAT
$445B
| $14.2M | 0.05% |
3,668
-2,073
| -36% | -$91.7K |
|
270
CALL
Altria Group
MO
$122B
| $14.2M | 0.05% |
2,348
+62
| +3% | +$3.68K |
|
271
PUT
Edwards Lifesciences
EW
$48.6B
| $14.1M | 0.05% |
2,430
+1,323
| +120% | +$64.7K |
|
272
CALL
Shopify
SHOP
$152B
| $14.1M | 0.05% |
8,570
+1,320
| +18% | +$20.1K |
|
273
PUT
Coca-Cola
KO
$355B
| $13.9M | 0.04% |
3,018
+857
| +40% | +$39.2K |
|
|
ESRX
274
PUT
DELISTED
Express Scripts Holding Company
ESRX
| $13.9M | 0.04% |
1,467
+699
| +91% | +$59.6K |
|
275
CALL
Lam Research
LRCX
$400B
| $13.8M | 0.04% |
9,090
-3,390
| -27% | -$57.9K |
|
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.