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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
INFO
1476
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $1.77M | ﹤0.01% |
326
+320
| +5,333% | +$16.8K |
|
1477
CALL
AngloGold Ashanti
AU
$40.3B
| $1.77M | ﹤0.01% |
1,351
-1,692
| -56% | -$22.7K |
|
1478
CALL
Hewlett Packard
HPE
$63.2B
| $1.77M | ﹤0.01% |
1,147
+784
| +216% | +$12.1K |
|
1479
CALL
Norwegian Cruise Line
NCLH
$8.89B
| $1.77M | ﹤0.01% |
322
+252
| +360% | +$13K |
|
|
CMA
1480
CALL
DELISTED
Comerica
CMA
| $1.77M | ﹤0.01% |
241
+144
| +148% | +$11.5K |
|
1481
Dentsply Sirona
XRAY
$2.59B
| $1.77M | ﹤0.01% |
35,642
+30,920
| +655% | +$1.36M |
|
|
SFLY
1482
CALL
DELISTED
Shutterfly, Inc.
SFLY
| $1.77M | ﹤0.01% |
435
-23
| -5% | -$1.01K |
|
1483
WisdomTree Japan Hedged Equity Fund
DXJ
$7.23B
| $1.77M | ﹤0.01% |
34,914
-2,641
| -7% | -$132K |
|
|
GSKY
1484
CALL
DELISTED
GreenSky, Inc. Class A Common Stock
GSKY
| $1.76M | ﹤0.01% |
1,362
+1,275
| +1,466% | +$14.5K |
|
1485
PUT
Coherent
COHR
$55.2B
| $1.76M | ﹤0.01% |
473
+402
| +566% | +$14.9K |
|
1486
State Street SPDR S&P Metals & Mining ETF
XME
$4.05B
| $1.76M | ﹤0.01% |
59,355
+22,005
| +59% | +$652K |
|
1487
CALL
National Healthcare
NHC
$3.53B
| $1.76M | ﹤0.01% |
232
+6
| +3% | +$476 |
|
1488
CALL
Generac Holdings
GNRC
$11.9B
| $1.76M | ﹤0.01% |
343
+259
| +308% | +$13.5K |
|
|
CONN
1489
PUT
DELISTED
Conn's Inc.
CONN
| $1.76M | ﹤0.01% |
769
+705
| +1,102% | +$15.2K |
|
1490
Quest Diagnostics
DGX
$25.1B
| $1.75M | ﹤0.01% |
19,497
+17,904
| +1,124% | +$1.55M |
|
|
KYNB
1491
PUT
Kyntra Bio
KYNB
$28.5M
| $1.75M | ﹤0.01% |
13
| – | – |
|
1492
CALL
Roper Technologies
ROP
$36.3B
| $1.74M | ﹤0.01% |
51
+49
| +2,450% | +$14.9K |
|
|
ITCI
1493
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $1.74M | ﹤0.01% |
1,431
+299
| +26% | +$3.82K |
|
1494
CALL
Matador Resources
MTDR
$6.31B
| $1.74M | ﹤0.01% |
901
+879
| +3,995% | +$16.4K |
|
1495
CALL
Penske Automotive Group
PAG
$14.3B
| $1.74M | ﹤0.01% |
390
+25
| +7% | +$1.11K |
|
1496
PUT
Howmet Aerospace
HWM
$116B
| $1.74M | ﹤0.01% |
1,188
-1,117
| -48% | -$16K |
|
1497
PUT
Louisiana-Pacific
LPX
$5.2B
| $1.74M | ﹤0.01% |
714
+691
| +3,004% | +$16.9K |
|
1498
Mercado Libre
MELI
$91.3B
| $1.74M | ﹤0.01% |
+3,428
| New | +$1.37M |
|
1499
PUT
Integra LifeSciences
IART
$1.54B
| $1.74M | ﹤0.01% |
+312
| New | +$15.9K |
|
1500
International Paper
IP
$22.3B
| $1.74M | ﹤0.01% |
39,636
+513
| +1% | +$22.2K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.