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 | |
|---|---|---|---|---|---|---|
276
CALL
lululemon athletica
LULU
$12.9B
| $13.7M | 0.04% |
846
+46
| +6% | +$6.31K |
|
277
CALL
Deere & Co
DE
$164B
| $13.7M | 0.04% |
914
-988
| -52% | -$142K |
|
278
CALL
Ulta Beauty
ULTA
$20.7B
| $13.7M | 0.04% |
485
+173
| +55% | +$44.1K |
|
279
PUT
NetEase
NTES
$77.2B
| $13.7M | 0.04% |
2,995
-1,475
| -33% | -$67.8K |
|
|
EXAS
280
PUT
DELISTED
Exact Sciences
EXAS
| $13.6M | 0.04% |
1,718
+1,210
| +238% | +$78.9K |
|
281
PUT
Accenture
ACN
$85.6B
| $13.5M | 0.04% |
796
+409
| +106% | +$68.1K |
|
|
HES
282
PUT
DELISTED
Hess
HES
| $13.5M | 0.04% |
1,886
+498
| +36% | +$32.8K |
|
283
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $13.4M | 0.04% |
1,210
+566
| +88% | +$63.1K |
|
284
PUT
Morgan Stanley
MS
$343B
| $13.4M | 0.04% |
2,873
-3,446
| -55% | -$168K |
|
285
Marathon Petroleum
MPC
$93.1B
| $13.3M | 0.04% |
166,804
+71,066
| +74% | +$5.62M |
|
286
PUT
iQIYI
IQ
$1.19B
| $13.3M | 0.04% |
4,915
-2,143
| -30% | -$63.8K |
|
287
PUT
DuPont de Nemours
DD
$18.9B
| $13.3M | 0.04% |
815
+454
| +126% | +$78.1K |
|
288
PUT
CSX Corp
CSX
$92.7B
| $13.1M | 0.04% |
5,316
+3,903
| +276% | +$93K |
|
289
CALL
Honeywell
HON
$73.7B
| $13.1M | 0.04% |
870
-555
| -39% | -$78.7K |
|
|
CGC
290
CALL
Canopy Growth
CGC
$391M
| $13M | 0.04% |
268
+204
| +319% | +$75.4K |
|
291
CALL
Applied Materials
AMAT
$444B
| $13M | 0.04% |
3,366
+2,187
| +185% | +$96.7K |
|
292
CALL
Comcast
CMCSA
$84.7B
| $13M | 0.04% |
3,667
-473
| -11% | -$16.7K |
|
293
CALL
Cummins
CMI
$91.6B
| $12.9M | 0.04% |
885
+250
| +39% | +$35.2K |
|
|
VMW
294
CALL
DELISTED
VMware, Inc
VMW
| $12.9M | 0.04% |
826
-616
| -43% | -$94.3K |
|
295
PUT
Halliburton
HAL
$27.5B
| $12.9M | 0.04% |
3,173
+457
| +17% | +$18.9K |
|
296
CALL
Elevance Health
ELV
$84.6B
| $12.8M | 0.04% |
467
-83
| -15% | -$21.5K |
|
|
SHPG
297
CALL
DELISTED
Shire pic
SHPG
| $12.7M | 0.04% |
700
-48
| -6% | -$8.31K |
|
|
298
Micron Technology
MU
$1.1T
| $12.7M | 0.04% |
280,441
-577,021
| -67% | -$29.1M |
|
|
SIVB
299
PUT
DELISTED
SVB Financial Group
SIVB
| $12.6M | 0.04% |
406
-13
| -3% | -$4.1K |
|
|
RDS.A
300
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $12.5M | 0.04% |
1,799
+1,002
| +126% | +$66.9K |
|
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.