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 | |
|---|---|---|---|---|---|---|
376
FLEX LNG
FLNG
$1.38B
| $984K | ﹤0.01% |
31,073
+20,881
| +205% | +$661K |
|
377
Lufax Holding
LU
$2.62B
| $981K | ﹤0.01% |
+96,614
| New | +$981K |
|
378
First Majestic Silver
AG
$4.47B
| $977K | ﹤0.01% |
128,225
-60,369
| -32% | -$460K |
|
379
PubMatic
PUBM
$389M
| $975K | ﹤0.01% |
+58,655
| New | +$975K |
|
380
JB Hunt Transport Services
JBHT
$13.6B
| $974K | ﹤0.01% |
6,230
+5,126
| +464% | +$801K |
|
|
TWNK
381
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $973K | ﹤0.01% |
41,887
+37,570
| +870% | +$873K |
|
382
XP
XP
$9.59B
| $972K | ﹤0.01% |
+51,134
| New | +$972K |
|
383
TD Synnex
SNX
$12.3B
| $960K | ﹤0.01% |
11,825
+10,310
| +681% | +$837K |
|
384
Skyworks Solutions
SWKS
$11.1B
| $956K | ﹤0.01% |
11,221
-12,993
| -54% | -$1.11M |
|
385
Orion
OEC
$589M
| $955K | ﹤0.01% |
71,588
+52,063
| +267% | +$695K |
|
386
iShares Select Dividend ETF
DVY
$20.7B
| $951K | ﹤0.01% |
+8,873
| New | +$951K |
|
387
ProShares Ultra S&P500
SSO
$7.24B
| $950K | ﹤0.01% |
23,938
+16,450
| +220% | +$653K |
|
388
L3Harris
LHX
$50.6B
| $946K | ﹤0.01% |
4,553
+653
| +17% | +$136K |
|
389
Dynatrace
DT
$15.3B
| $933K | ﹤0.01% |
26,821
+7,414
| +38% | +$258K |
|
390
The Beauty Health Co
SKIN
$309M
| $930K | ﹤0.01% |
78,906
-40,459
| -34% | -$477K |
|
391
Navios Maritime Partners
NMM
$1.44B
| $929K | ﹤0.01% |
37,893
+15,819
| +72% | +$388K |
|
392
CyberArk
CYBR
$23.7B
| $926K | ﹤0.01% |
6,176
-65
| -1% | -$9.75K |
|
393
Banco Santander
SAN
$145B
| $925K | ﹤0.01% |
399,009
+101,777
| +34% | +$236K |
|
|
XM
394
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $925K | ﹤0.01% |
90,938
+72,447
| +392% | +$737K |
|
395
Becton Dickinson
BDX
$54.6B
| $924K | ﹤0.01% |
4,147
-148
| -3% | -$33K |
|
396
Vital Energy
VTLE
$606M
| $915K | ﹤0.01% |
14,559
+11,053
| +315% | +$695K |
|
397
Scorpio Tankers
STNG
$2.91B
| $912K | ﹤0.01% |
21,705
-16,498
| -43% | -$693K |
|
|
TELL
398
DELISTED
Tellurian Inc.
TELL
| $910K | ﹤0.01% |
381,097
-67,202
| -15% | -$160K |
|
399
Regency Centers
REG
$13.1B
| $902K | ﹤0.01% |
16,768
+8,112
| +94% | +$436K |
|
400
Universal Display
OLED
$6.64B
| $898K | ﹤0.01% |
+9,523
| New | +$898K |
|