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 | |
|---|---|---|---|---|---|---|
351
PUT
Marriott International
MAR
$97.5B
| $10.5M | 0.03% |
792
+4
| +0.5% | +$510 |
|
|
SPLK
352
CALL
DELISTED
Splunk Inc
SPLK
| $10.4M | 0.03% |
859
+116
| +16% | +$12.9K |
|
353
CALL
Automatic Data Processing
ADP
$97.2B
| $10.4M | 0.03% |
689
-495
| -42% | -$70K |
|
354
PUT
Honeywell
HON
$73.8B
| $10.3M | 0.03% |
689
-777
| -53% | -$110K |
|
355
PUT
LyondellBasell Industries
LYB
$20.1B
| $10.3M | 0.03% |
1,008
+736
| +271% | +$80.5K |
|
356
CALL
Starbucks
SBUX
$119B
| $10.3M | 0.03% |
1,816
-632
| -26% | -$33.4K |
|
357
CALL
Arista Networks
ANET
$220B
| $10.3M | 0.03% |
6,208
+4,160
| +203% | +$70.8K |
|
358
CALL
Best Buy
BBY
$18.4B
| $10.3M | 0.03% |
1,297
+15
| +1% | +$1.16K |
|
|
UWC
359
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $10.3M | 0.03% |
1,944
-308
| -14% | -$1.63M |
|
360
FedEx
FDX
$76.6B
| $10.2M | 0.03% |
+42,209
| New | +$10.2M |
|
361
PUT
General Motors
GM
$74.1B
| $10.1M | 0.03% |
3,010
-846
| -22% | -$31.2K |
|
362
PUT
Match Group
MTCH
$8.87B
| $10.1M | 0.03% |
1,746
+414
| +31% | +$19.4K |
|
363
SLB Ltd
SLB
$71.3B
| $10.1M | 0.03% |
165,897
+144,052
| +659% | +$9.27M |
|
|
TYNS
364
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $10.1M | 0.03% |
1,498
+568
| +61% | +$16.4K |
|
365
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $10.1M | 0.03% |
4,687
+2,373
| +103% | +$55.1K |
|
366
CALL
Autodesk
ADSK
$43B
| $10.1M | 0.03% |
646
-496
| -43% | -$70K |
|
367
CALL
Bausch Health
BHC
$1.7B
| $9.86M | 0.03% |
3,841
+1,560
| +68% | +$35.7K |
|
368
CALL
Humana
HUM
$47.7B
| $9.85M | 0.03% |
291
+215
| +283% | +$69.9K |
|
369
CALL
Cisco
CSCO
$442B
| $9.82M | 0.03% |
2,019
-2,204
| -52% | -$99.1K |
|
|
TWTR
370
DELISTED
Twitter, Inc.
TWTR
| $9.8M | 0.03% |
344,228
+341,428
| +12,194% | +$12.1M |
|
371
PUT
Vanguard S&P 500 ETF
VOO
$979B
| $9.77M | 0.03% |
922
+201
| +28% | +$52.6K |
|
372
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $9.74M | 0.03% |
265
+136
| +105% | +$49.8K |
|
|
373
PUT
Best Buy
BBY
$18.4B
| $9.68M | 0.03% |
1,220
+260
| +27% | +$20.1K |
|
374
PUT
Domino's
DPZ
$10.6B
| $9.67M | 0.03% |
328
+115
| +54% | +$32.6K |
|
375
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $9.64M | 0.03% |
597
-471
| -44% | -$64.4K |
|
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.