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 | |
|---|---|---|---|---|---|---|
401
CALL
NextEra Energy
NEE
$186B
| $9M | 0.03% |
2,148
+1,296
| +152% | +$55.2K |
|
402
CALL
Vanguard FTSE Europe ETF
VGK
$30.2B
| $8.97M | 0.03% |
1,767
-539
| -23% | -$30.5K |
|
403
PUT
Arista Networks
ANET
$220B
| $8.93M | 0.03% |
5,376
+1,360
| +34% | +$23.1K |
|
|
AIMC
404
PUT
DELISTED
Altra Industrial Motion Corp
AIMC
| $8.86M | 0.03% |
2,146
+2,136
| +21,360% | +$89.3K |
|
405
PUT
American International
AIG
$41.5B
| $8.85M | 0.03% |
1,662
+305
| +22% | +$16.4K |
|
406
CALL
CSX Corp
CSX
$92.8B
| $8.81M | 0.03% |
3,570
+1,416
| +66% | +$33.7K |
|
407
CALL
Kohl's
KSS
$2.16B
| $8.78M | 0.03% |
1,178
-100
| -8% | -$7.57K |
|
|
RHT
408
CALL
DELISTED
Red Hat Inc
RHT
| $8.75M | 0.03% |
642
-63
| -9% | -$9.01K |
|
409
PUT
Estee Lauder
EL
$29.9B
| $8.73M | 0.03% |
601
-31
| -5% | -$4.3K |
|
410
Salesforce
CRM
$133B
| $8.71M | 0.03% |
+54,765
| New | +$8.13M |
|
411
CALL
Teva Pharmaceuticals
TEVA
$35.1B
| $8.69M | 0.03% |
4,033
+689
| +21% | +$16K |
|
412
PUT
ServiceNow
NOW
$98.4B
| $8.67M | 0.03% |
2,215
+510
| +30% | +$19.3K |
|
|
PPLC
413
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $8.66M | 0.03% |
2,687
+1,281
| +91% | +$50K |
|
414
PUT
Weibo
WB
$1.93B
| $8.64M | 0.03% |
1,181
-103
| -8% | -$8.29K |
|
415
CALL
Papa John's
PZZA
$1.05B
| $8.63M | 0.03% |
1,684
+1,252
| +290% | +$57.9K |
|
416
PUT
Twilio
TWLO
$27.8B
| $8.62M | 0.03% |
999
+161
| +19% | +$11.8K |
|
417
PUT
MGM Resorts International
MGM
$11.6B
| $8.59M | 0.03% |
3,078
-102
| -3% | -$2.96K |
|
418
PUT
Danaher
DHR
$127B
| $8.52M | 0.03% |
884
+290
| +49% | +$26.4K |
|
419
PUT
Idexx Laboratories
IDXX
$43B
| $8.49M | 0.03% |
340
+116
| +52% | +$28.2K |
|
|
PXD
420
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $8.48M | 0.03% |
487
-235
| -33% | -$42K |
|
421
CALL
Halliburton
HAL
$27.6B
| $8.45M | 0.03% |
2,086
-979
| -32% | -$40.5K |
|
422
PUT
Intuit
INTU
$77.8B
| $8.39M | 0.03% |
369
+271
| +277% | +$58.2K |
|
423
PUT
Medtronic
MDT
$105B
| $8.34M | 0.03% |
848
-102
| -11% | -$9.43K |
|
424
PUT
Fortive
FTV
$18.4B
| $8.34M | 0.03% |
1,570
+1,557
| +11,977% | +$79.8K |
|
425
CALL
Bunge Global
BG
$24B
| $8.32M | 0.03% |
1,211
-267
| -18% | -$17.6K |
|
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.