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 | |
|---|---|---|---|---|---|---|
651
PUT
Restaurant Brands International
QSR
$25.4B
| $4.73M | 0.02% |
798
+313
| +65% | +$19.1K |
|
652
PUT
Stanley Black & Decker
SWK
$13.9B
| $4.73M | 0.02% |
323
+286
| +773% | +$40.7K |
|
653
PUT
MongoDB
MDB
$24.5B
| $4.71M | 0.02% |
578
+301
| +109% | +$20.1K |
|
654
PUT
Huntington Ingalls Industries
HII
$10.9B
| $4.71M | 0.02% |
184
+31
| +20% | +$7.42K |
|
655
PUT
HF Sinclair
DINO
$16.4B
| $4.7M | 0.02% |
673
-32
| -5% | -$2.26K |
|
|
XLNX
656
PUT
DELISTED
Xilinx Inc
XLNX
| $4.7M | 0.02% |
586
-40
| -6% | -$2.93K |
|
|
KYNB
657
PUT
Kyntra Bio
KYNB
$29.2M
| $4.7M | 0.02% |
31
+14
| +82% | +$21.6K |
|
658
CALL
VeriSign
VRSN
$23.9B
| $4.69M | 0.02% |
293
+171
| +140% | +$26.2K |
|
659
Ulta Beauty
ULTA
$20.8B
| $4.69M | 0.02% |
16,626
+1,009
| +6% | +$257K |
|
|
DOCU
660
PUT
DocuSign
DOCU
$9.14B
| $4.68M | 0.02% |
890
+198
| +29% | +$11.2K |
|
|
SCHW
661
CALL
Charles Schwab
SCHW
$175B
| $4.66M | 0.02% |
949
-767
| -45% | -$39.2K |
|
|
AMTD
662
PUT
DELISTED
TD Ameritrade Holding Corp
AMTD
| $4.66M | 0.02% |
883
+596
| +208% | +$33.9K |
|
663
CALL
F5
FFIV
$22.6B
| $4.65M | 0.01% |
233
+14
| +6% | +$2.56K |
|
664
PUT
Qorvo
QRVO
$7.89B
| $4.64M | 0.01% |
604
-329
| -35% | -$26.3K |
|
665
CALL
Danaher
DHR
$127B
| $4.64M | 0.01% |
482
-5
| -1% | -$455 |
|
666
CALL
Cognizant
CTSH
$20.4B
| $4.64M | 0.01% |
601
+207
| +53% | +$16.2K |
|
667
PUT
General Mills
GIS
$19.7B
| $4.62M | 0.01% |
1,076
-29
| -3% | -$1.31K |
|
668
PUT
State Street
STT
$50.9B
| $4.62M | 0.01% |
551
+9
| +2% | +$791 |
|
669
PUT
United Therapeutics
UTHR
$26.2B
| $4.62M | 0.01% |
361
+113
| +46% | +$14K |
|
670
Mastercard
MA
$470B
| $4.6M | 0.01% |
20,670
-13,786
| -40% | -$2.88M |
|
671
Electronic Arts
EA
$52.4B
| $4.59M | 0.01% |
38,106
+10,962
| +40% | +$1.41M |
|
672
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $4.57M | 0.01% |
2,234
-60
| -3% | -$2.84K |
|
673
PUT
HubSpot
HUBS
$10.5B
| $4.56M | 0.01% |
302
+251
| +492% | +$34.5K |
|
674
PUT
Valmont Industries
VMI
$9.46B
| $4.56M | 0.01% |
329
+301
| +1,075% | +$42.4K |
|
675
American Airlines Group
AAL
$9.78B
| $4.55M | 0.01% |
110,144
-5,849
| -5% | -$229K |
|
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.