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 |
Amazon
AMZN
|
+$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$68.7M |
| 3 |
AT&T
T
|
+$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
+$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
+$94.2M |
| 2 |
Citigroup
C
|
+$62.3M |
| 3 |
JPMorgan Chase
JPM
|
+$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
+$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
Riskified
RSKD
$715M
| $384K | ﹤0.01% |
+83,187
| New | +$384K |
|
577
Similarweb
SMWB
$837M
| $384K | ﹤0.01% |
59,827
+28,675
| +92% | +$184K |
|
578
Integra LifeSciences
IART
$1.2B
| $383K | ﹤0.01% |
6,844
+6,753
| +7,421% | +$378K |
|
579
Veru
VERU
$56.6M
| $383K | ﹤0.01% |
7,262
-26,682
| -79% | -$1.41M |
|
580
Beyond Meat
BYND
$191M
| $382K | ﹤0.01% |
31,068
+30,118
| +3,170% | +$370K |
|
581
PagSeguro Digital
PAGS
$2.7B
| $382K | ﹤0.01% |
43,773
+31,092
| +245% | +$271K |
|
582
Sphere Entertainment
SPHR
$1.97B
| $382K | ﹤0.01% |
8,504
+7,966
| +1,481% | +$358K |
|
583
Twist Bioscience
TWST
$1.46B
| $382K | ﹤0.01% |
16,048
+15,044
| +1,498% | +$358K |
|
584
Old National Bancorp
ONB
$8.81B
| $381K | ﹤0.01% |
21,212
+6,259
| +42% | +$112K |
|
585
United States 12 Month Oil Fund,
USL
$43.5M
| $381K | ﹤0.01% |
10,733
-2,328
| -18% | -$82.6K |
|
586
SPDR Bloomberg Short Term High Yield Bond ETF
SJNK
$4.87B
| $379K | ﹤0.01% |
15,668
+13,099
| +510% | +$317K |
|
|
SIX
587
DELISTED
Six Flags Entertainment Corp.
SIX
| $379K | ﹤0.01% |
+16,313
| New | +$379K |
|
588
Zymeworks
ZYME
$1.15B
| $378K | ﹤0.01% |
48,192
+13,122
| +37% | +$103K |
|
|
VLRS
589
Controladora Vuela Compañía de Aviación
VLRS
$712M
| $377K | ﹤0.01% |
45,209
+8,690
| +24% | +$72.5K |
|
590
ProPetro Holding
PUMP
$505M
| $372K | ﹤0.01% |
35,933
+5,448
| +18% | +$56.4K |
|
591
Teleflex
TFX
$5.76B
| $370K | ﹤0.01% |
+1,484
| New | +$370K |
|
592
Autohome
ATHM
$3.4B
| $368K | ﹤0.01% |
+12,028
| New | +$368K |
|
|
VRE
593
Veris Residential
VRE
$1.49B
| $366K | ﹤0.01% |
+22,987
| New | +$366K |
|
594
SPDR Portfolio S&P 500 Growth ETF
SPYG
$41.4B
| $365K | ﹤0.01% |
+7,207
| New | +$365K |
|
595
TPG
TPG
$8.85B
| $357K | ﹤0.01% |
+12,860
| New | +$357K |
|
596
Denison Mines
DNN
$2.2B
| $356K | ﹤0.01% |
310,023
-62,541
| -17% | -$71.8K |
|
597
Asana
ASAN
$3.14B
| $355K | ﹤0.01% |
+25,847
| New | +$355K |
|
598
Unum
UNM
$12.6B
| $355K | ﹤0.01% |
8,654
-3,174
| -27% | -$130K |
|
599
Eve Holding
EVEX
$1.11B
| $354K | ﹤0.01% |
49,174
-15,119
| -24% | -$109K |
|
600
Nano X Imaging
NNOX
$242M
| $352K | ﹤0.01% |
47,723
+47,523
| +23,762% | +$351K |
|