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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
P
1451
CALL
Everpure Inc
P
$24.8B
| $1.4M | 0.01% |
587
+374
| +176% | +$8.22K |
|
1452
CALL
Aon
AON
$77.3B
| $1.4M | 0.01% |
102
-47
| -32% | -$6.62K |
|
|
EQM
1453
CALL
DELISTED
EQM Midstream Partners, LP
EQM
| $1.4M | 0.01% |
271
+19
| +8% | +$1.07K |
|
1454
PUT
Shake Shack
SHAK
$2.3B
| $1.4M | 0.01% |
211
+178
| +539% | +$9.87K |
|
1455
CALL
H.B. Fuller
FUL
$3B
| $1.4M | 0.01% |
260
+122
| +88% | +$6.33K |
|
1456
PUT
ArcelorMittal
MT
$50.4B
| $1.4M | 0.01% |
485
+214
| +79% | +$7.1K |
|
1457
CALL
Idexx Laboratories
IDXX
$42.9B
| $1.39M | 0.01% |
64
-30
| -32% | -$6.18K |
|
|
GWPH
1458
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $1.39M | 0.01% |
+9,965
| New | +$1.42M |
|
1459
PUT
LPL Financial
LPLA
$26.3B
| $1.39M | 0.01% |
212
+19
| +10% | +$1.25K |
|
1460
PUT
Ligand Pharmaceuticals
LGND
$6.02B
| $1.39M | 0.01% |
107
+77
| +257% | +$8.59K |
|
1461
PUT
Applied Optoelectronics
AAOI
$8.04B
| $1.39M | 0.01% |
309
-449
| -59% | -$16K |
|
1462
CALL
Teladoc Health
TDOC
$1.58B
| $1.39M | 0.01% |
239
+176
| +279% | +$8.6K |
|
|
EGN
1463
DELISTED
Energen
EGN
| $1.39M | 0.01% |
19,035
+15,347
| +416% | +$1.01M |
|
1464
CALL
Boise Cascade
BCC
$2.74B
| $1.39M | 0.01% |
310
+148
| +91% | +$6.5K |
|
1465
Brighthouse Financial
BHF
$3.63B
| $1.39M | 0.01% |
34,567
+25,987
| +303% | +$1.25M |
|
1466
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $1.39M | 0.01% |
330
-14
| -4% | -$559 |
|
1467
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $1.39M | 0.01% |
279
+195
| +232% | +$9.68K |
|
1468
PUT
Sinclair Inc
SBGI
$974M
| $1.39M | 0.01% |
431
+357
| +482% | +$10.7K |
|
1469
Williams-Sonoma
WSM
$26.7B
| $1.39M | 0.01% |
+45,148
| New | +$1.21M |
|
1470
CALL
Regency Centers
REG
$15B
| $1.38M | 0.01% |
223
-27
| -11% | -$1.58K |
|
|
KYNB
1471
CALL
Kyntra Bio
KYNB
$28.5M
| $1.38M | 0.01% |
9
+8
| +800% | +$10.4K |
|
1472
PUT
Hewlett Packard
HPE
$63.2B
| $1.38M | 0.01% |
963
-13
| -1% | -$216 |
|
1473
CALL
NOV
NOV
$7.45B
| $1.38M | 0.01% |
318
-98
| -24% | -$3.97K |
|
|
APU
1474
CALL
DELISTED
AmeriGas Partners, L.P.
APU
| $1.38M | 0.01% |
327
+221
| +208% | +$9.2K |
|
1475
SolarEdge
SEDG
$2.59B
| $1.38M | 0.01% |
28,839
+2,692
| +10% | +$149K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.