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 | |
|---|---|---|---|---|---|---|
1501
PUT
Teladoc Health
TDOC
$1.58B
| $1.73M | ﹤0.01% |
312
-175
| -36% | -$10.7K |
|
|
SIVB
1502
PUT
DELISTED
SVB Financial Group
SIVB
| $1.73M | ﹤0.01% |
78
-422
| -84% | -$98.3K |
|
1503
CALL
Canadian Pacific Kansas City
CP
$82B
| $1.73M | ﹤0.01% |
420
-755
| -64% | -$30.3K |
|
1504
PUT
Tenet Healthcare
THC
$20.1B
| $1.73M | ﹤0.01% |
600
+506
| +538% | +$12.5K |
|
1505
PPG Industries
PPG
$25.9B
| $1.73M | ﹤0.01% |
+15,312
| New | +$1.64M |
|
1506
Boston Scientific
BSX
$65.8B
| $1.73M | ﹤0.01% |
44,996
+34,601
| +333% | +$1.32M |
|
1507
CALL
AGCO
AGCO
$8.78B
| $1.72M | ﹤0.01% |
248
+239
| +2,656% | +$15.5K |
|
1508
CALL
Affiliated Managers Group
AMG
$9.46B
| $1.72M | ﹤0.01% |
161
+145
| +906% | +$15.4K |
|
1509
CALL
Chegg
CHGG
$108M
| $1.72M | ﹤0.01% |
452
+420
| +1,313% | +$15.3K |
|
1510
CALL
Molson Coors Class B
TAP
$7.68B
| $1.72M | ﹤0.01% |
289
+171
| +145% | +$10.6K |
|
|
PVTL
1511
CALL
DELISTED
Pivotal Software, Inc.
PVTL
| $1.72M | ﹤0.01% |
825
+241
| +41% | +$4.71K |
|
1512
CALL
NovoCure
NVCR
$2.04B
| $1.72M | ﹤0.01% |
357
+261
| +272% | +$12.6K |
|
1513
PUT
Steven Madden
SHOO
$3.12B
| $1.72M | ﹤0.01% |
508
+429
| +543% | +$14K |
|
1514
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.72M | ﹤0.01% |
447
+188
| +73% | +$7.68K |
|
1515
CALL
Helen of Troy
HELE
$663M
| $1.72M | ﹤0.01% |
148
+136
| +1,133% | +$15.7K |
|
1516
CALL
Ameren
AEE
$31.5B
| $1.71M | ﹤0.01% |
233
+224
| +2,489% | +$15.6K |
|
1517
PUT
Iridium Communications
IRDM
$4.85B
| $1.71M | ﹤0.01% |
648
+473
| +270% | +$10.2K |
|
1518
PUT
Upbound Group
UPBD
$1.19B
| $1.71M | ﹤0.01% |
821
-642
| -44% | -$11.8K |
|
|
IPFF
1519
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $1.71M | ﹤0.01% |
445
+308
| +225% | +$4.82K |
|
1520
PUT
Popular Inc
BPOP
$11B
| $1.7M | ﹤0.01% |
327
+284
| +660% | +$15.1K |
|
|
TSG
1521
CALL
DELISTED
The Stars Group Inc.
TSG
| $1.7M | ﹤0.01% |
973
-386
| -28% | -$6.64K |
|
1522
CALL
Leggett & Platt
LEG
$1.52B
| $1.7M | ﹤0.01% |
403
+389
| +2,779% | +$16.4K |
|
1523
PUT
Kinder Morgan
KMI
$73.1B
| $1.7M | ﹤0.01% |
850
+226
| +36% | +$4.22K |
|
1524
CALL
Nektar Therapeutics
NKTR
$2.39B
| $1.7M | ﹤0.01% |
34
+7
| +26% | +$4.15K |
|
1525
CALL
Qorvo
QRVO
$7.63B
| $1.7M | ﹤0.01% |
237
-13
| -5% | -$861 |
|
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.