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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
476
TJX Companies
TJX
$156B
| $712K | ﹤0.01% |
+11,466
| New | +$712K |
|
477
Southwest Airlines
LUV
$16.3B
| $709K | ﹤0.01% |
23,018
+12,238
| +114% | +$377K |
|
478
Molson Coors Class B
TAP
$9.7B
| $709K | ﹤0.01% |
14,781
+9,981
| +208% | +$479K |
|
479
Direxion Daily Real Estate Bear 3X Shares
DRV
$43M
| $705K | ﹤0.01% |
10,457
+7,532
| +258% | +$508K |
|
480
PAR Technology
PAR
$1.85B
| $702K | ﹤0.01% |
23,792
-10,699
| -31% | -$316K |
|
481
Viatris
VTRS
$11.9B
| $701K | ﹤0.01% |
82,350
-18,135
| -18% | -$154K |
|
482
Tilray
TLRY
$1.2B
| $696K | ﹤0.01% |
253,250
-71,930
| -22% | -$198K |
|
|
CCEC
483
Capital Clean Energy Carriers Corp. Common Share
CCEC
$1.25B
| $694K | ﹤0.01% |
51,900
-54,939
| -51% | -$735K |
|
484
iQIYI
IQ
$2.5B
| $692K | ﹤0.01% |
+255,590
| New | +$692K |
|
485
Caleres
CAL
$527M
| $690K | ﹤0.01% |
+28,523
| New | +$690K |
|
486
Concentrix
CNXC
$3.25B
| $683K | ﹤0.01% |
+6,125
| New | +$683K |
|
487
Invesco CurrencyShares British Pound Sterling Trust
FXB
$91M
| $681K | ﹤0.01% |
6,355
+4,531
| +248% | +$486K |
|
|
SBOW
488
DELISTED
SilverBow Resources, Inc.
SBOW
| $678K | ﹤0.01% |
25,233
+25,014
| +11,422% | +$672K |
|
489
Gartner
IT
$17.6B
| $676K | ﹤0.01% |
+2,444
| New | +$676K |
|
490
Cincinnati Financial
CINF
$23.8B
| $670K | ﹤0.01% |
+7,486
| New | +$670K |
|
491
Alto Ingredients
ALTO
$89M
| $669K | ﹤0.01% |
183,964
-77,713
| -30% | -$283K |
|
492
Tradeweb Markets
TW
$25.3B
| $669K | ﹤0.01% |
11,875
-13,501
| -53% | -$761K |
|
493
Resideo Technologies
REZI
$5.39B
| $664K | ﹤0.01% |
34,878
+11,987
| +52% | +$228K |
|
|
PRTK
494
DELISTED
Paratek Pharmaceuticals, Inc.
PRTK
| $663K | ﹤0.01% |
+258,285
| New | +$663K |
|
495
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$587M
| $659K | ﹤0.01% |
20,044
-21,541
| -52% | -$708K |
|
496
Direxion Daily CSI China Internet Index Bull 2X Shares
CWEB
$350M
| $658K | ﹤0.01% |
16,867
+689
| +4% | +$26.9K |
|
|
NVTA
497
DELISTED
Invitae Corporation
NVTA
| $657K | ﹤0.01% |
+267,297
| New | +$657K |
|
498
Advance Auto Parts
AAP
$3.55B
| $655K | ﹤0.01% |
4,190
-1,031
| -20% | -$161K |
|
499
Conagra Brands
CAG
$9.27B
| $653K | ﹤0.01% |
20,036
-71,594
| -78% | -$2.33M |
|
500
SiriusXM
SIRI
$8.02B
| $653K | ﹤0.01% |
+11,451
| New | +$653K |
|