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
|
$216M |
| 2 |
Apple
AAPL
|
$159M |
| 3 |
Broadcom
AVGO
|
$128M |
| 4 |
Booking.com
BKNG
|
$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$141M |
| 2 |
Amazon
AMZN
|
$53.1M |
| 3 |
TSMC
TSM
|
$45.7M |
| 4 |
Netflix
NFLX
|
$45.3M |
| 5 |
Pfizer
PFE
|
$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
451
Vermilion Energy
VET
$1.12B
| $886K | ﹤0.01% |
121,745
+41,567
| +52% | +$303K |
|
452
Stratasys
SSYS
$871M
| $881K | ﹤0.01% |
76,811
-9,082
| -11% | -$104K |
|
453
Lantheus
LNTH
$3.72B
| $876K | ﹤0.01% |
+10,708
| New | +$876K |
|
454
Worthington Enterprises
WOR
$3.24B
| $866K | ﹤0.01% |
13,613
+5,026
| +59% | +$320K |
|
|
AACT
455
Ares Acquisition Corporation II
AACT
$706M
| $865K | ﹤0.01% |
+76,373
| New | +$865K |
|
456
Boston Properties
BXP
$12.2B
| $860K | ﹤0.01% |
12,755
-599
| -4% | -$40.4K |
|
457
Corteva
CTVA
$49.1B
| $860K | ﹤0.01% |
+11,544
| New | +$860K |
|
458
Direxion Daily NYSE FANG+ Bull 2X Shares
FNGG
$134M
| $859K | ﹤0.01% |
4,022
+4,019
| +133,967% | +$858K |
|
459
NiSource
NI
$19B
| $857K | ﹤0.01% |
21,246
-8,456
| -28% | -$341K |
|
460
Saia
SAIA
$8.34B
| $852K | ﹤0.01% |
3,110
+3,021
| +3,394% | +$828K |
|
461
SL Green Realty
SLG
$4.4B
| $848K | ﹤0.01% |
13,712
+4,048
| +42% | +$250K |
|
462
Cboe Global Markets
CBOE
$24.3B
| $846K | ﹤0.01% |
3,628
+2,699
| +291% | +$629K |
|
463
Direxion Daily Technology Bull 3x Shares
TECL
$3.48B
| $844K | ﹤0.01% |
+9,021
| New | +$844K |
|
|
ETHE
464
Grayscale Ethereum Trust ETF
ETHE
$4.89B
| $844K | ﹤0.01% |
+40,473
| New | +$844K |
|
465
Atlas Energy Solutions
AESI
$1.34B
| $842K | ﹤0.01% |
+63,047
| New | +$842K |
|
466
3M
MMM
$82.7B
| $840K | ﹤0.01% |
5,524
-46,615
| -89% | -$7.09M |
|
|
MAG
467
DELISTED
MAG Silver
MAG
| $836K | ﹤0.01% |
+39,597
| New | +$836K |
|
468
Crocs
CROX
$4.72B
| $832K | ﹤0.01% |
8,218
-8,235
| -50% | -$834K |
|
469
Light & Wonder
LNW
$7.48B
| $830K | ﹤0.01% |
8,631
+6,944
| +412% | +$668K |
|
470
Biogen
BIIB
$20.6B
| $828K | ﹤0.01% |
6,599
+3,440
| +109% | +$432K |
|
|
471
Pfizer
PFE
$141B
| $828K | ﹤0.01% |
34,183
-1,582,619
| -98% | -$38.3M |
|
472
PENN Entertainment
PENN
$2.99B
| $824K | ﹤0.01% |
46,127
-254,431
| -85% | -$4.55M |
|
473
Arcus Biosciences
RCUS
$1.3B
| $823K | ﹤0.01% |
101,200
+95,436
| +1,656% | +$776K |
|
474
LegalZoom.com
LZ
$1.86B
| $819K | ﹤0.01% |
91,938
+133
| +0.1% | +$1.19K |
|
475
Host Hotels & Resorts
HST
$12B
| $812K | ﹤0.01% |
52,903
+42,638
| +415% | +$654K |
|