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 | |
|---|---|---|---|---|---|---|
551
BWX Technologies
BWXT
$15.2B
| $545K | ﹤0.01% |
10,821
+3,660
| +51% | +$184K |
|
552
Direxion Daily Energy Bull 2X Shares
ERX
$224M
| $545K | ﹤0.01% |
11,808
-71,968
| -86% | -$3.32M |
|
553
uniQure
QURE
$959M
| $544K | ﹤0.01% |
29,037
-161,804
| -85% | -$3.03M |
|
554
Caesarstone
CSTE
$50.5M
| $542K | ﹤0.01% |
58,237
+35,342
| +154% | +$329K |
|
555
Nordic American Tanker
NAT
$675M
| $534K | ﹤0.01% |
200,027
+117,772
| +143% | +$314K |
|
|
ITCI
556
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $531K | ﹤0.01% |
+11,431
| New | +$531K |
|
557
SPDR Bloomberg Convertible Securities ETF
CWB
$4.46B
| $525K | ﹤0.01% |
+8,296
| New | +$525K |
|
558
Regions Financial
RF
$24.1B
| $525K | ﹤0.01% |
26,197
-27,197
| -51% | -$545K |
|
|
CMRC
559
Commerce.com, Inc. Series 1 Common Stock
CMRC
$365M
| $521K | ﹤0.01% |
35,259
+23,929
| +211% | +$354K |
|
|
TGH
560
DELISTED
Textainer Group Holdings limited
TGH
| $519K | ﹤0.01% |
19,350
+4,301
| +29% | +$115K |
|
561
Smith & Wesson
SWBI
$416M
| $516K | ﹤0.01% |
+49,793
| New | +$516K |
|
562
Tanger
SKT
$3.86B
| $514K | ﹤0.01% |
37,575
-9,430
| -20% | -$129K |
|
563
Sprout Social
SPT
$816M
| $511K | ﹤0.01% |
+8,422
| New | +$511K |
|
564
Fortuna Silver Mines
FSM
$2.42B
| $510K | ﹤0.01% |
202,766
+73,345
| +57% | +$184K |
|
565
Dayforce
DAY
$10.9B
| $510K | ﹤0.01% |
9,138
-7,178
| -44% | -$401K |
|
566
Ametek
AME
$43.3B
| $509K | ﹤0.01% |
+4,489
| New | +$509K |
|
|
ALLK
567
DELISTED
Allakos
ALLK
| $507K | ﹤0.01% |
82,896
-7,710
| -9% | -$47.2K |
|
568
Editas Medicine
EDIT
$230M
| $505K | ﹤0.01% |
+41,268
| New | +$505K |
|
569
Airbnb
ABNB
$75.6B
| $502K | ﹤0.01% |
4,783
-3,000
| -39% | -$315K |
|
570
Penumbra
PEN
$10.6B
| $502K | ﹤0.01% |
+2,651
| New | +$502K |
|
571
Safe Bulkers
SB
$458M
| $502K | ﹤0.01% |
203,561
+85,334
| +72% | +$210K |
|
572
KeyCorp
KEY
$21.1B
| $500K | ﹤0.01% |
+31,272
| New | +$500K |
|
573
BlackBerry
BB
$2.25B
| $498K | ﹤0.01% |
106,133
+1,723
| +2% | +$8.09K |
|
574
SM Energy
SM
$3.14B
| $498K | ﹤0.01% |
+13,263
| New | +$498K |
|
575
ICU Medical
ICUI
$3.3B
| $497K | ﹤0.01% |
+3,306
| New | +$497K |
|