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 | |
|---|---|---|---|---|---|---|
451
PUT
Phillips 66
PSX
$84.8B
| $7.69M | 0.02% |
682
-90
| -12% | -$10.4K |
|
|
SODA
452
PUT
DELISTED
SodaStream International Ltd
SODA
| $7.68M | 0.02% |
537
+185
| +53% | +$22.3K |
|
453
PUT
Burlington
BURL
$22.3B
| $7.67M | 0.02% |
471
+3
| +0.6% | +$479 |
|
454
PUT
Expedia Group
EXPE
$31.3B
| $7.67M | 0.02% |
588
-586
| -50% | -$76.1K |
|
455
CALL
Carnival Corporation Ltd
CCL
$35.7B
| $7.65M | 0.02% |
1,200
+76
| +7% | +$4.61K |
|
456
CALL
Charter Communications
CHTR
$15.9B
| $7.63M | 0.02% |
234
+19
| +9% | +$5.8K |
|
457
CALL
Kimberly-Clark
KMB
$36.1B
| $7.61M | 0.02% |
670
+309
| +86% | +$34.6K |
|
458
State Street Financial Select Sector SPDR ETF
XLF
$55.3B
| $7.61M | 0.02% |
275,868
+91,590
| +50% | +$2.56M |
|
459
CALL
Mercado Libre
MELI
$91.2B
| $7.59M | 0.02% |
223
-19
| -8% | -$6.43K |
|
|
PXD
460
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $7.58M | 0.02% |
435
-286
| -40% | -$51.1K |
|
|
MOMO
461
PUT
Hello Group
MOMO
$876M
| $7.57M | 0.02% |
1,728
+327
| +23% | +$14.3K |
|
462
PUT
Universal Display
OLED
$3.81B
| $7.54M | 0.02% |
640
-534
| -45% | -$58.7K |
|
|
SVU
463
CALL
DELISTED
SUPERVALU Inc.
SVU
| $7.42M | 0.02% |
2,302
+2,015
| +702% | +$58.9K |
|
464
CALL
United Rentals
URI
$64.8B
| $7.41M | 0.02% |
453
+160
| +55% | +$24.9K |
|
465
PUT
Albemarle
ALB
$13.9B
| $7.35M | 0.02% |
737
+6
| +0.8% | +$581 |
|
|
ATHN
466
CALL
DELISTED
Athenahealth, Inc.
ATHN
| $7.35M | 0.02% |
550
+261
| +90% | +$39.1K |
|
467
PUT
Freeport-McMoran
FCX
$93.4B
| $7.34M | 0.02% |
5,276
+4,127
| +359% | +$62.3K |
|
|
NBIS
468
PUT
Nebius Group N.V.
NBIS
$55.4B
| $7.29M | 0.02% |
2,217
+249
| +13% | +$8.43K |
|
|
469
CALL
Phillips 66
PSX
$84.8B
| $7.27M | 0.02% |
645
+252
| +64% | +$29.1K |
|
470
CALL
Agilent Technologies
A
$37.7B
| $7.26M | 0.02% |
1,029
+597
| +138% | +$39.5K |
|
471
CALL
NetApp
NTAP
$32.6B
| $7.24M | 0.02% |
843
+271
| +47% | +$22.4K |
|
472
CALL
PNC Financial Services
PNC
$101B
| $7.23M | 0.02% |
531
-198
| -27% | -$28.1K |
|
473
Northrop Grumman
NOC
$74.6B
| $7.2M | 0.02% |
22,673
+9,651
| +74% | +$2.94M |
|
|
X
474
CALL
DELISTED
US Steel
X
| $7.12M | 0.02% |
2,336
-843
| -27% | -$27.2K |
|
475
CALL
Petrobras
PBR
$122B
| $7.09M | 0.02% |
5,877
+3,364
| +134% | +$37.3K |
|
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.