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 | |
|---|---|---|---|---|---|---|
651
PUT
iQIYI
IQ
$1.18B
| $5.23M | 0.01% |
2,185
+419
| +24% | +$9.26K |
|
|
VAR
652
PUT
DELISTED
Varian Medical Systems, Inc.
VAR
| $5.21M | 0.01% |
368
+161
| +78% | +$21.1K |
|
653
PUT
Ecolab
ECL
$74.1B
| $5.21M | 0.01% |
295
-224
| -43% | -$36.4K |
|
|
BEL
654
CALL
DELISTED
Belmond Ltd.
BEL
| $5.21M | 0.01% |
2,089
+1,865
| +833% | +$46.4K |
|
655
PUT
British American Tobacco
BTI
$129B
| $5.21M | 0.01% |
1,248
-201
| -14% | -$7.31K |
|
656
PUT
Fortinet
FTNT
$111B
| $5.21M | 0.01% |
3,100
-645
| -17% | -$10.3K |
|
657
CALL
Omnicom Group
OMC
$22.2B
| $5.2M | 0.01% |
713
+232
| +48% | +$17.4K |
|
658
CALL
International Flavors & Fragrances
IFF
$18.8B
| $5.2M | 0.01% |
404
+120
| +42% | +$15.9K |
|
659
CALL
Royal Gold
RGLD
$16.9B
| $5.19M | 0.01% |
571
+359
| +169% | +$31.4K |
|
660
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.37B
| $5.18M | 0.01% |
180,360
+83,588
| +86% | +$2.14M |
|
661
CALL
Colgate-Palmolive
CL
$72.1B
| $5.17M | 0.01% |
754
-2,036
| -73% | -$132K |
|
662
CALL
Humana
HUM
$47.4B
| $5.16M | 0.01% |
194
-125
| -39% | -$36K |
|
|
VMW
663
CALL
DELISTED
VMware, Inc
VMW
| $5.14M | 0.01% |
285
-772
| -73% | -$126K |
|
664
PUT
Viatris
VTRS
$20.1B
| $5.13M | 0.01% |
1,809
+592
| +49% | +$17.3K |
|
|
GRA
665
CALL
DELISTED
W.R. Grace & Co.
GRA
| $5.12M | 0.01% |
656
+508
| +343% | +$37.4K |
|
666
PUT
Pinnacle West Capital
PNW
$12.8B
| $5.11M | 0.01% |
535
+312
| +140% | +$28.2K |
|
667
CALL
Assurant
AIZ
$13.6B
| $5.11M | 0.01% |
538
+535
| +17,833% | +$51.8K |
|
668
CALL
Bausch Health
BHC
$1.67B
| $5.1M | 0.01% |
2,065
-568
| -22% | -$13.6K |
|
|
669
Colgate-Palmolive
CL
$72.1B
| $5.08M | 0.01% |
74,180
+31,331
| +73% | +$2.02M |
|
670
PUT
EPAM Systems
EPAM
$4.5B
| $5.07M | 0.01% |
300
+252
| +525% | +$37.8K |
|
671
PUT
Motorola Solutions
MSI
$67.6B
| $5.07M | 0.01% |
361
-137
| -28% | -$17.8K |
|
672
CALL
Essex Property Trust
ESS
$18.8B
| $5.06M | 0.01% |
175
+39
| +29% | +$10.6K |
|
673
CALL
Oneok
OKE
$58.8B
| $5.06M | 0.01% |
724
+181
| +33% | +$11.7K |
|
674
Texas Instruments
TXN
$259B
| $5.05M | 0.01% |
+47,592
| New | +$4.93M |
|
675
CALL
Ally Financial
ALLY
$13.4B
| $5.04M | 0.01% |
1,835
+1,186
| +183% | +$31K |
|
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.