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 | |
|---|---|---|---|---|---|---|
1426
CALL
Guidewire Software
GWRE
$10.9B
| $1.62M | 0.01% |
160
+51
| +47% | +$4.9K |
|
1427
CALL
Olin
OLN
$2.69B
| $1.61M | 0.01% |
629
+493
| +363% | +$14.5K |
|
1428
PUT
Snap-on
SNA
$20.5B
| $1.61M | 0.01% |
88
+16
| +22% | +$2.79K |
|
1429
PUT
Advanced Energy
AEIS
$12.6B
| $1.61M | 0.01% |
312
+245
| +366% | +$14.2K |
|
|
MOMO
1430
CALL
Hello Group
MOMO
$870M
| $1.61M | 0.01% |
368
-17
| -4% | -$743 |
|
1431
PUT
Nucor
NUE
$54.9B
| $1.61M | 0.01% |
254
+91
| +56% | +$5.83K |
|
1432
Okta
OKTA
$23.7B
| $1.61M | 0.01% |
22,898
-2,452
| -10% | -$146K |
|
|
SEND
1433
PUT
DELISTED
SendGrid, Inc.
SEND
| $1.61M | 0.01% |
438
+396
| +943% | +$12.5K |
|
1434
CALL
United Parks & Resorts
PRKS
$2.08B
| $1.61M | 0.01% |
512
+195
| +62% | +$5.08K |
|
1435
CALL
Eastman Chemical
EMN
$7.77B
| $1.61M | 0.01% |
168
-55
| -25% | -$5.45K |
|
1436
PUT
Celanese
CE
$5.19B
| $1.61M | 0.01% |
141
+101
| +253% | +$11.6K |
|
|
SFLY
1437
PUT
DELISTED
Shutterfly, Inc.
SFLY
| $1.61M | 0.01% |
244
+51
| +26% | +$4.04K |
|
|
EVHC
1438
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $1.61M | 0.01% |
35,156
+7,921
| +29% | +$356K |
|
1439
PUT
Voya Financial
VOYA
$8.78B
| $1.6M | 0.01% |
323
+149
| +86% | +$7.36K |
|
|
GBT
1440
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $1.6M | 0.01% |
421
-938
| -69% | -$41.5K |
|
|
TUP
1441
CALL
DELISTED
Tupperware Brands Corporation
TUP
| $1.59M | 0.01% |
476
+447
| +1,541% | +$16K |
|
1442
CALL
Supernus Pharmaceuticals
SUPN
$2.74B
| $1.59M | 0.01% |
316
+262
| +485% | +$12.9K |
|
|
CEO
1443
DELISTED
CNOOC Limited
CEO
| $1.59M | 0.01% |
+8,054
| New | +$1.37M |
|
1444
PUT
Expeditors International
EXPD
$23B
| $1.59M | 0.01% |
216
+142
| +192% | +$10.5K |
|
|
WWE
1445
DELISTED
World Wrestling Entertainment
WWE
| $1.59M | 0.01% |
+16,402
| New | +$1.36M |
|
1446
CALL
Viatris
VTRS
$20.1B
| $1.58M | 0.01% |
432
-229
| -35% | -$8.6K |
|
1447
CALL
HDFC Bank
HDB
$119B
| $1.58M | 0.01% |
672
-104
| -13% | -$2.65K |
|
|
BRSL
1448
PUT
Brightstar Lottery PLC
BRSL
$1.9B
| $1.58M | 0.01% |
799
-125
| -14% | -$2.72K |
|
1449
CALL
Fortune Brands Innovations
FBIN
$5.94B
| $1.58M | 0.01% |
352
+343
| +3,811% | +$16.1K |
|
1450
PUT
KB Home
KBH
$3.41B
| $1.57M | 0.01% |
659
+324
| +97% | +$8.13K |
|
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.