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 | |
|---|---|---|---|---|---|---|
|
SIVB
551
CALL
DELISTED
SVB Financial Group
SIVB
| $5.81M | 0.02% |
187
+137
| +274% | +$43.2K |
|
552
CALL
Genuine Parts
GPC
$16.6B
| $5.79M | 0.02% |
583
+137
| +31% | +$13.4K |
|
553
CALL
Sony
SONY
$123B
| $5.77M | 0.02% |
4,760
+1,870
| +65% | +$20.6K |
|
|
APC
554
CALL
DELISTED
Anadarko Petroleum
APC
| $5.76M | 0.02% |
854
-311
| -27% | -$21K |
|
555
PUT
Cummins
CMI
$91.2B
| $5.75M | 0.02% |
394
+96
| +32% | +$13.5K |
|
556
CALL
Mondelez International
MDLZ
$78.1B
| $5.74M | 0.02% |
1,337
+659
| +97% | +$28.1K |
|
557
PUT
Zoetis
ZTS
$31.1B
| $5.74M | 0.02% |
627
+202
| +48% | +$17.9K |
|
558
CALL
Thermo Fisher Scientific
TMO
$196B
| $5.74M | 0.02% |
235
-20
| -8% | -$4.6K |
|
559
PUT
DexCom
DXCM
$27.6B
| $5.72M | 0.02% |
1,600
+1,356
| +556% | +$42K |
|
560
PUT
Newell Brands
NWL
$2.29B
| $5.68M | 0.02% |
2,797
+1,710
| +157% | +$40.2K |
|
561
Wynn Resorts
WYNN
$9.79B
| $5.67M | 0.02% |
44,671
+8,067
| +22% | +$1.2M |
|
562
CALL
Waste Management
WM
$94.9B
| $5.66M | 0.02% |
626
-285
| -31% | -$25.3K |
|
563
PUT
Check Point Software Technologies
CHKP
$13.3B
| $5.65M | 0.02% |
480
+15
| +3% | +$1.7K |
|
564
CALL
TSMC
TSM
$2.18T
| $5.64M | 0.02% |
1,277
+383
| +43% | +$15.9K |
|
565
PUT
Vanguard FTSE Europe ETF
VGK
$30.2B
| $5.63M | 0.02% |
1,230
+520
| +73% | +$29.5K |
|
566
CALL
American Electric Power
AEP
$72.4B
| $5.58M | 0.02% |
787
+594
| +308% | +$42.3K |
|
567
Intuitive Surgical
ISRG
$121B
| $5.57M | 0.02% |
29,103
-4,764
| -14% | -$846K |
|
568
CALL
Edwards Lifesciences
EW
$48.6B
| $5.52M | 0.02% |
951
+327
| +52% | +$16K |
|
569
State Street SPDR S&P Retail ETF
XRT
$373M
| $5.5M | 0.02% |
+107,727
| New | +$5.47M |
|
|
MRO
570
PUT
DELISTED
Marathon Oil Corporation
MRO
| $5.47M | 0.02% |
2,351
+1,551
| +194% | +$32.5K |
|
|
MNK
571
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $5.47M | 0.02% |
1,867
+834
| +81% | +$23.5K |
|
572
PUT
Acuity Brands
AYI
$9.93B
| $5.47M | 0.02% |
348
-20
| -5% | -$2.87K |
|
573
PUT
Trade Desk
TTD
$8.26B
| $5.46M | 0.02% |
3,620
+570
| +19% | +$6.76K |
|
|
JJT
574
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $5.46M | 0.02% |
1,443
+1,437
| +23,950% | +$68.6K |
|
575
PUT
Molina Healthcare
MOH
$11.6B
| $5.46M | 0.02% |
367
+128
| +54% | +$16.3K |
|
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.