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 | |
|---|---|---|---|---|---|---|
401
CALL
Edwards Lifesciences
EW
$48.6B
| $9.81M | 0.03% |
1,539
+858
| +126% | +$49K |
|
402
CALL
Occidental Petroleum
OXY
$57.2B
| $9.81M | 0.03% |
1,482
-734
| -33% | -$48.4K |
|
403
PUT
Valero Energy
VLO
$92.3B
| $9.77M | 0.03% |
1,152
+17
| +1% | +$1.41K |
|
404
CALL
Prudential Financial
PRU
$41.3B
| $9.75M | 0.03% |
1,061
+91
| +9% | +$8.39K |
|
405
PUT
Herbalife
HLF
$1.26B
| $9.74M | 0.03% |
1,839
+156
| +9% | +$8.96K |
|
406
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $9.68M | 0.03% |
6,864
+3,530
| +106% | +$162K |
|
407
PUT
Best Buy
BBY
$18.4B
| $9.65M | 0.03% |
1,358
-335
| -20% | -$20.9K |
|
408
PUT
J.M. Smucker
SJM
$12.6B
| $9.6M | 0.03% |
824
+632
| +329% | +$66.1K |
|
|
VIAB
409
PUT
DELISTED
Viacom Inc. Class B
VIAB
| $9.56M | 0.03% |
3,404
+2,868
| +535% | +$82.3K |
|
410
CALL
Carnival Corporation Ltd
CCL
$35.7B
| $9.55M | 0.03% |
1,884
+1,011
| +116% | +$56K |
|
411
CALL
Mondelez International
MDLZ
$78.1B
| $9.51M | 0.03% |
1,906
+938
| +97% | +$43K |
|
412
PUT
Cencora
COR
$58.5B
| $9.49M | 0.03% |
1,193
+957
| +406% | +$76.9K |
|
413
CALL
Stanley Black & Decker
SWK
$13.9B
| $9.46M | 0.03% |
695
+294
| +73% | +$38.3K |
|
414
CALL
Ferrari
RACE
$65.4B
| $9.43M | 0.03% |
705
+613
| +666% | +$75.1K |
|
415
PUT
Automatic Data Processing
ADP
$97.2B
| $9.38M | 0.03% |
587
+347
| +145% | +$50.4K |
|
416
PUT
Check Point Software Technologies
CHKP
$13.3B
| $9.33M | 0.03% |
738
+204
| +38% | +$23.7K |
|
417
PUT
Match Group
MTCH
$8.87B
| $9.26M | 0.03% |
1,635
+55
| +3% | +$2.91K |
|
418
PUT
Elevance Health
ELV
$84.4B
| $9.24M | 0.03% |
322
+156
| +94% | +$45.1K |
|
419
PUT
Zoetis
ZTS
$31.1B
| $9.18M | 0.03% |
912
+261
| +40% | +$23.7K |
|
420
PUT
Arista Networks
ANET
$220B
| $9.12M | 0.03% |
4,640
-928
| -17% | -$14.7K |
|
|
ICPT
421
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $9.09M | 0.03% |
813
+245
| +43% | +$26.8K |
|
422
PUT
Lumen
LUMN
$6.9B
| $9.08M | 0.03% |
7,575
+5,258
| +227% | +$73.1K |
|
423
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $9.07M | 0.03% |
3,112
+1,966
| +172% | +$43.6K |
|
|
424
CALL
Arista Networks
ANET
$220B
| $9.06M | 0.03% |
4,608
-576
| -11% | -$9.14K |
|
425
CALL
United Rentals
URI
$64.8B
| $8.91M | 0.02% |
780
-829
| -52% | -$102K |
|
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.