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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
DOOR
501
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $778K | ﹤0.01% |
9,200
+9,160
| +22,900% | +$775K |
|
502
Xcel Energy
XEL
$42.8B
| $777K | ﹤0.01% |
12,560
-1,284
| -9% | -$79.4K |
|
503
LiveRamp
RAMP
$1.74B
| $775K | ﹤0.01% |
20,478
+19,298
| +1,635% | +$730K |
|
504
BlueLinx
BXC
$628M
| $774K | ﹤0.01% |
6,831
+5,251
| +332% | +$595K |
|
505
Nokia
NOK
$24.6B
| $773K | ﹤0.01% |
226,085
+160,975
| +247% | +$550K |
|
506
Simply Good Foods
SMPL
$2.73B
| $770K | ﹤0.01% |
+19,469
| New | +$770K |
|
507
iShares Russell 3000 ETF
IWV
$16.8B
| $769K | ﹤0.01% |
+2,811
| New | +$769K |
|
508
Real Estate Select Sector SPDR Fund
XLRE
$7.72B
| $768K | ﹤0.01% |
+19,178
| New | +$768K |
|
509
Boise Cascade
BCC
$3.21B
| $763K | ﹤0.01% |
+5,904
| New | +$763K |
|
510
SiriusXM
SIRI
$8.02B
| $762K | ﹤0.01% |
+13,945
| New | +$762K |
|
511
ProShares UltraPro Russell2000
URTY
$393M
| $756K | ﹤0.01% |
16,324
+13,715
| +526% | +$635K |
|
512
Hologic
HOLX
$14.6B
| $750K | ﹤0.01% |
+10,499
| New | +$750K |
|
513
RenaissanceRe
RNR
$11.2B
| $750K | ﹤0.01% |
3,829
+974
| +34% | +$191K |
|
514
Jacobs Solutions
J
$17.3B
| $747K | ﹤0.01% |
+6,962
| New | +$747K |
|
|
HRT
515
DELISTED
HireRight Holdings Corporation
HRT
| $747K | ﹤0.01% |
+55,606
| New | +$747K |
|
516
The Beauty Health Co
SKIN
$292M
| $740K | ﹤0.01% |
238,109
+179,150
| +304% | +$557K |
|
517
Boston Beer
SAM
$2.39B
| $739K | ﹤0.01% |
+2,140
| New | +$739K |
|
518
Aramark
ARMK
$10B
| $737K | ﹤0.01% |
26,252
-64,634
| -71% | -$1.81M |
|
519
Lumentum
LITE
$11.5B
| $737K | ﹤0.01% |
+14,078
| New | +$737K |
|
|
LSXMA
520
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $737K | ﹤0.01% |
25,669
-15,945
| -38% | -$458K |
|
521
Advanced Drainage Systems
WMS
$11B
| $733K | ﹤0.01% |
5,218
+4,034
| +341% | +$567K |
|
522
Altimmune
ALT
$324M
| $732K | ﹤0.01% |
65,131
-3,867
| -6% | -$43.5K |
|
523
Vanguard Mega Cap Growth ETF
MGK
$29.4B
| $732K | ﹤0.01% |
+2,822
| New | +$732K |
|
524
SSR Mining
SSRM
$4.46B
| $731K | ﹤0.01% |
67,991
+41,934
| +161% | +$451K |
|
525
CAVA Group
CAVA
$7.56B
| $730K | ﹤0.01% |
+16,992
| New | +$730K |
|