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
| 1 |
NVIDIA
NVDA
|
+$60M |
| 2 |
Microsoft
MSFT
|
+$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.5M |
| 4 |
PayPal
PYPL
|
+$40.9M |
| 5 |
Netflix
NFLX
|
+$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
+$48.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
Adobe
ADBE
|
+$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 5 |
Enphase Energy
ENPH
|
+$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
526
Radware
RDWR
$1.1B
| $544K | ﹤0.01% |
28,091
+21,441
| +322% | +$415K |
|
527
Scorpio Tankers
STNG
$2.9B
| $544K | ﹤0.01% |
+11,524
| New | +$544K |
|
528
Perion Network
PERI
$415M
| $543K | ﹤0.01% |
17,731
-1,024
| -5% | -$31.4K |
|
529
Frontline
FRO
$5.06B
| $542K | ﹤0.01% |
+37,327
| New | +$542K |
|
530
Cheesecake Factory
CAKE
$2.91B
| $541K | ﹤0.01% |
+15,661
| New | +$541K |
|
531
iShares Core MSCI Emerging Markets ETF
IEMG
$105B
| $540K | ﹤0.01% |
10,972
-28,249
| -72% | -$1.39M |
|
532
Stoke Therapeutics
STOK
$1.22B
| $537K | ﹤0.01% |
+50,555
| New | +$537K |
|
533
Iovance Biotherapeutics
IOVA
$854M
| $535K | ﹤0.01% |
76,042
+52,466
| +223% | +$369K |
|
534
Biohaven
BHVN
$1.49B
| $534K | ﹤0.01% |
+22,333
| New | +$534K |
|
535
Lifecore Biomedical
LFCR
$265M
| $534K | ﹤0.01% |
55,274
+5,873
| +12% | +$56.7K |
|
|
ESMT
536
DELISTED
EngageSmart, Inc.
ESMT
| $530K | ﹤0.01% |
27,766
+6,717
| +32% | +$128K |
|
|
EGLE
537
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $530K | ﹤0.01% |
11,044
+4,820
| +77% | +$231K |
|
538
LiveWire
LVWR
$945M
| $528K | ﹤0.01% |
44,763
+44,762
| +4,476,200% | +$528K |
|
539
Dolby
DLB
$6.84B
| $527K | ﹤0.01% |
6,309
-9,684
| -61% | -$809K |
|
|
TELL
540
DELISTED
Tellurian Inc.
TELL
| $527K | ﹤0.01% |
373,789
-18,184
| -5% | -$25.6K |
|
541
Vanguard Utilities ETF
VPU
$7.29B
| $526K | ﹤0.01% |
3,705
+1,936
| +109% | +$275K |
|
542
PagSeguro Digital
PAGS
$2.76B
| $523K | ﹤0.01% |
55,488
-1,534
| -3% | -$14.5K |
|
543
Charles River Laboratories
CRL
$7.69B
| $522K | ﹤0.01% |
+2,487
| New | +$522K |
|
544
Lantheus
LNTH
$3.55B
| $522K | ﹤0.01% |
+6,225
| New | +$522K |
|
545
CleanSpark
CLSK
$2.83B
| $521K | ﹤0.01% |
121,634
+18,540
| +18% | +$79.4K |
|
546
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$280M
| $518K | ﹤0.01% |
17,644
-202,019
| -92% | -$5.93M |
|
547
DocGo
DCGO
$154M
| $517K | ﹤0.01% |
55,186
+25,944
| +89% | +$243K |
|
|
OBE
548
Obsidian Energy
OBE
$413M
| $517K | ﹤0.01% |
88,785
-147,350
| -62% | -$858K |
|
549
Under Armour Class C
UA
$2.07B
| $517K | ﹤0.01% |
77,150
+28,218
| +58% | +$189K |
|
550
Direxion Daily Energy Bull 2X Shares
ERX
$221M
| $516K | ﹤0.01% |
9,439
-10,924
| -54% | -$597K |
|