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 | |
|---|---|---|---|---|---|---|
951
Cencora
COR
$59.4B
| $3.38M | 0.01% |
42,489
+30,435
| +252% | +$2.45M |
|
952
PUT
Autoliv
ALV
$8.44B
| $3.38M | 0.01% |
459
+257
| +127% | +$19.9K |
|
953
CALL
BlackBerry
BB
$5.06B
| $3.37M | 0.01% |
3,344
+2,342
| +234% | +$19.7K |
|
954
CALL
Xerox
XRX
$341M
| $3.37M | 0.01% |
1,053
-598
| -36% | -$16.9K |
|
955
ServiceNow
NOW
$95.1B
| $3.37M | 0.01% |
68,285
+8,425
| +14% | +$370K |
|
|
COUP
956
CALL
DELISTED
Coupa Software Incorporated
COUP
| $3.37M | 0.01% |
370
+286
| +340% | +$24.5K |
|
|
SPLK
957
DELISTED
Splunk Inc
SPLK
| $3.35M | 0.01% |
26,905
+6,980
| +35% | +$871K |
|
|
CZR
958
CALL
DELISTED
Caesars Entertainment Corporation
CZR
| $3.35M | 0.01% |
3,854
+1,037
| +37% | +$8.99K |
|
|
SPR
959
PUT
DELISTED
Spirit AeroSystems
SPR
| $3.34M | 0.01% |
365
+291
| +393% | +$25.7K |
|
960
PUT
Eastman Chemical
EMN
$7.77B
| $3.34M | 0.01% |
440
+86
| +24% | +$6.83K |
|
961
CALL
DXC Technology
DXC
$1.5B
| $3.34M | 0.01% |
519
+361
| +228% | +$23.1K |
|
962
CALL
Baker Hughes
BKR
$55.6B
| $3.32M | 0.01% |
1,197
+688
| +135% | +$17.4K |
|
963
CALL
Broadridge
BR
$16.7B
| $3.32M | 0.01% |
320
+7
| +2% | +$702 |
|
964
CALL
Tyson Foods
TSN
$20B
| $3.32M | 0.01% |
478
+334
| +232% | +$20.7K |
|
965
CALL
Herbalife
HLF
$1.22B
| $3.31M | 0.01% |
624
+376
| +152% | +$21.6K |
|
966
PUT
HDFC Bank
HDB
$119B
| $3.3M | 0.01% |
1,140
+292
| +34% | +$7.57K |
|
|
BFYT
967
CALL
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $3.29M | 0.01% |
1,228
+476
| +63% | +$16.9K |
|
968
CALL
Jack Henry & Associates
JKHY
$10.5B
| $3.29M | 0.01% |
237
+15
| +7% | +$1.98K |
|
969
PUT
Post Holdings
POST
$4.09B
| $3.28M | 0.01% |
458
+452
| +7,533% | +$29.6K |
|
|
SRG
970
PUT
Seritage Growth Properties
SRG
$130M
| $3.27M | 0.01% |
737
+586
| +388% | +$24.4K |
|
971
iShares 7-10 Year Treasury Bond ETF
IEF
$47B
| $3.27M | 0.01% |
+30,689
| New | +$3.21M |
|
|
VAR
972
CALL
DELISTED
Varian Medical Systems, Inc.
VAR
| $3.27M | 0.01% |
231
+162
| +235% | +$21.3K |
|
973
PUT
Seagate
STX
$207B
| $3.27M | 0.01% |
683
-1,689
| -71% | -$74.9K |
|
974
CALL
Travelers Companies
TRV
$78.5B
| $3.26M | 0.01% |
238
+58
| +32% | +$7.42K |
|
975
PUT
Agilent Technologies
A
$39.5B
| $3.26M | 0.01% |
406
+376
| +1,253% | +$28.5K |
|
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.