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 | |
|---|---|---|---|---|---|---|
901
CALL
Agilent Technologies
A
$39.5B
| $3.65M | 0.01% |
454
+317
| +231% | +$24.1K |
|
902
CALL
Yum China
YUMC
$14.8B
| $3.65M | 0.01% |
812
-74
| -8% | -$2.92K |
|
903
PUT
Digital Realty Trust
DLR
$66.4B
| $3.64M | 0.01% |
306
-9
| -3% | -$1K |
|
904
CALL
F5
FFIV
$21.9B
| $3.64M | 0.01% |
232
-182
| -44% | -$29.3K |
|
|
LHCG
905
PUT
DELISTED
LHC Group LLC
LHCG
| $3.64M | 0.01% |
328
+106
| +48% | +$11.3K |
|
906
PUT
MGM Resorts International
MGM
$11.5B
| $3.63M | 0.01% |
1,415
+12
| +0.9% | +$329 |
|
|
ABB
907
PUT
DELISTED
ABB Ltd
ABB
| $3.62M | 0.01% |
1,921
+688
| +56% | +$13.3K |
|
908
PUT
Danaher
DHR
$135B
| $3.62M | 0.01% |
309
-77
| -20% | -$7.89K |
|
909
CALL
Williams Companies
WMB
$92B
| $3.61M | 0.01% |
+1,258
| New | +$33.7K |
|
910
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $3.61M | 0.01% |
337
-601
| -64% | -$65.2K |
|
|
CLDR
911
PUT
DELISTED
Cloudera, Inc.
CLDR
| $3.6M | 0.01% |
3,294
+3,050
| +1,250% | +$39.2K |
|
912
PUT
Equifax
EFX
$19.6B
| $3.6M | 0.01% |
304
+227
| +295% | +$24.2K |
|
913
PUT
Zscaler
ZS
$22.6B
| $3.6M | 0.01% |
507
+386
| +319% | +$20.5K |
|
914
CALL
Under Armour Class C
UA
$2.81B
| $3.59M | 0.01% |
1,718
-1,410
| -45% | -$26.7K |
|
|
BLUE
915
PUT
DELISTED
bluebird bio
BLUE
| $3.57M | 0.01% |
18
-11
| -38% | -$19.4K |
|
916
PUT
Raymond James Financial
RJF
$31.9B
| $3.57M | 0.01% |
666
+450
| +208% | +$24.1K |
|
|
JWN
917
PUT
DELISTED
Nordstrom
JWN
| $3.57M | 0.01% |
804
-234
| -23% | -$10.7K |
|
|
CRC
918
PUT
DELISTED
California Resources Corporation
CRC
| $3.56M | 0.01% |
1,386
+7
| +0.5% | +$152 |
|
919
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $3.56M | 0.01% |
2,270
-4,790
| -68% | -$84.5K |
|
920
PUT
Coty
COTY
$2.29B
| $3.55M | 0.01% |
3,090
+2,861
| +1,249% | +$27.1K |
|
|
HES
921
CALL
DELISTED
Hess
HES
| $3.55M | 0.01% |
589
-395
| -40% | -$21.7K |
|
922
PUT
Oneok
OKE
$58.7B
| $3.55M | 0.01% |
508
+300
| +144% | +$19.4K |
|
923
CALL
HCA Healthcare
HCA
$83.5B
| $3.53M | 0.01% |
271
-223
| -45% | -$30K |
|
|
HRC
924
CALL
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
| $3.52M | 0.01% |
333
+321
| +2,675% | +$32.3K |
|
925
PUT
Neurocrine Biosciences
NBIX
$17.5B
| $3.52M | 0.01% |
400
+282
| +239% | +$23.6K |
|
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.