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 | |
|---|---|---|---|---|---|---|
451
Innoviz Technologies
INVZ
$347M
| $760K | ﹤0.01% |
146,017
-2,540
| -2% | -$13.2K |
|
452
Chegg
CHGG
$179M
| $755K | ﹤0.01% |
35,841
+21,884
| +157% | +$461K |
|
|
MMP
453
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $753K | ﹤0.01% |
15,850
-15,728
| -50% | -$747K |
|
454
TG Therapeutics
TGTX
$5.05B
| $752K | ﹤0.01% |
127,028
-33,381
| -21% | -$198K |
|
455
BioMarin Pharmaceuticals
BMRN
$10.5B
| $748K | ﹤0.01% |
8,825
-2,397
| -21% | -$203K |
|
456
FerroAtlántica
GSM
$778M
| $742K | ﹤0.01% |
140,568
-9,930
| -7% | -$52.4K |
|
457
Tractor Supply
TSCO
$31B
| $740K | ﹤0.01% |
19,925
+6,695
| +51% | +$249K |
|
458
iShares S&P 500 Growth ETF
IVW
$65B
| $738K | ﹤0.01% |
12,765
+1,405
| +12% | +$81.2K |
|
459
Omega Healthcare
OHI
$12.6B
| $735K | ﹤0.01% |
24,954
+9,627
| +63% | +$284K |
|
460
Plains All American Pipeline
PAA
$12.2B
| $735K | ﹤0.01% |
69,932
-46,372
| -40% | -$487K |
|
461
Sociedad Química y Minera de Chile
SQM
$11.9B
| $733K | ﹤0.01% |
+8,084
| New | +$733K |
|
462
Olaplex Holdings
OLPX
$941M
| $732K | ﹤0.01% |
76,674
+63,791
| +495% | +$609K |
|
463
Constellation Energy
CEG
$100B
| $728K | ﹤0.01% |
+8,760
| New | +$728K |
|
|
464
Meta Platforms (Facebook)
META
$1.89T
| $728K | ﹤0.01% |
5,370
-293,509
| -98% | -$39.8M |
|
465
DaVita
DVA
$9.46B
| $726K | ﹤0.01% |
8,778
+7,278
| +485% | +$602K |
|
466
PNC Financial Services
PNC
$79.5B
| $726K | ﹤0.01% |
+4,864
| New | +$726K |
|
467
Udemy
UDMY
$1B
| $726K | ﹤0.01% |
+60,112
| New | +$726K |
|
468
AeroVironment
AVAV
$12.3B
| $725K | ﹤0.01% |
8,699
+1,059
| +14% | +$88.3K |
|
469
Huazhu Hotels Group
HTHT
$11.4B
| $724K | ﹤0.01% |
21,587
+8,332
| +63% | +$279K |
|
|
IGMS
470
DELISTED
IGM Biosciences
IGMS
| $722K | ﹤0.01% |
31,768
+3,126
| +11% | +$71K |
|
471
Calumet Specialty Products
CLMT
$1.53B
| $718K | ﹤0.01% |
56,067
+55,156
| +6,054% | +$706K |
|
472
JetBlue
JBLU
$1.85B
| $718K | ﹤0.01% |
108,349
-123,799
| -53% | -$820K |
|
|
RFP
473
DELISTED
Resolute Forest Products Inc.
RFP
| $718K | ﹤0.01% |
35,904
+15,159
| +73% | +$303K |
|
474
Kanzhun
BZ
$11.2B
| $716K | ﹤0.01% |
42,431
-37,228
| -47% | -$628K |
|
475
Plug Power
PLUG
$1.66B
| $713K | ﹤0.01% |
33,961
-50,229
| -60% | -$1.05M |
|