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 |
Broadcom
AVGO
|
+$33.7M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.8M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.3M |
| 4 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$11.9M |
| 5 |
Citigroup
C
|
+$8.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.2M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.7M |
| 4 |
Walt Disney
DIS
|
+$13.3M |
| 5 |
Booking.com
BKNG
|
+$12.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 7.64% |
| 2 | Communication Services | 6.85% |
| 3 | Consumer Discretionary | 4.92% |
| 4 | Healthcare | 4.57% |
| 5 | Financials | 4.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SNDK
576
CALL
DELISTED
SANDISK CORP
SNDK
| $361K | 0.03% |
1,078
-261
| -19% | -$18.8K |
|
577
CALL
American Tower
AMT
$77.4B
| $360K | 0.03% |
651
+255
| +64% | +$23.8K |
|
578
CALL
Lam Research
LRCX
$399B
| $359K | 0.03% |
3,670
-1,380
| -27% | -$10K |
|
579
Alaska Air
ALK
$4.95B
| $357K | 0.03% |
4,356
+3,371
| +342% | +$249K |
|
580
PUT
CF Industries
CF
$19.6B
| $353K | 0.03% |
858
-369
| -30% | -$12K |
|
|
MOMO
581
PUT
Hello Group
MOMO
$876M
| $351K | 0.03% |
1,418
+904
| +176% | +$10.8K |
|
582
Vanguard Growth ETF
VUG
$222B
| $350K | 0.03% |
+19,764
| New | +$331K |
|
583
Waters Corp
WAT
$36.4B
| $350K | 0.03% |
2,654
+2,134
| +410% | +$266K |
|
584
CALL
EOG Resources
EOG
$76.7B
| $349K | 0.03% |
1,996
+1,080
| +118% | +$74.6K |
|
585
First Solar
FSLR
$22.4B
| $349K | 0.03% |
+5,101
| New | +$342K |
|
|
PTLA
586
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $348K | 0.03% |
17,077
+9,979
| +141% | +$317K |
|
587
PUT
Deutsche Bank
DB
$68.1B
| $347K | 0.03% |
1,771
+996
| +129% | +$16.7K |
|
588
CALL
Energy Transfer Partners
ET
$70.1B
| $347K | 0.03% |
4,404
+1,290
| +41% | +$10.1K |
|
589
CALL
Oneok
OKE
$57.8B
| $347K | 0.03% |
757
+628
| +487% | +$15.5K |
|
590
Prospect Capital
PSEC
$1.07B
| $346K | 0.03% |
+47,679
| New | +$317K |
|
|
GWPH
591
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $346K | 0.03% |
421
+72
| +21% | +$3.95K |
|
|
MON
592
PUT
DELISTED
Monsanto Co
MON
| $346K | 0.03% |
667
-188
| -22% | -$17K |
|
593
CALL
Under Armour
UAA
$3.1B
| $345K | 0.03% |
1,172
-717
| -38% | -$28.1K |
|
594
Omnicom Group
OMC
$22.6B
| $343K | 0.03% |
+4,132
| New | +$311K |
|
595
CALL
Phillips 66
PSX
$84.8B
| $342K | 0.03% |
759
+220
| +41% | +$17.9K |
|
596
PUT
Wells Fargo
WFC
$262B
| $340K | 0.03% |
2,154
+797
| +59% | +$39K |
|
597
PUT
Sarepta Therapeutics
SRPT
$1.67B
| $338K | 0.03% |
566
+50
| +10% | +$874 |
|
598
IPG Photonics
IPGP
$4.15B
| $337K | 0.03% |
+3,514
| New | +$298K |
|
599
CALL
Valero Energy
VLO
$92.3B
| $337K | 0.03% |
1,364
-1,234
| -47% | -$78.5K |
|
|
CHL
600
DELISTED
China Mobile Limited
CHL
| $337K | 0.03% |
+6,090
| New | +$328K |
|
Similar funds
Simplex Trading's Q1 2016 Portfolio in Review
As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.
By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
- Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
- Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
- Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
- Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
- Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
- Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.
Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.