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 |
NVIDIA
NVDA
|
$216M |
| 2 |
Apple
AAPL
|
$159M |
| 3 |
Broadcom
AVGO
|
$128M |
| 4 |
Booking.com
BKNG
|
$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$141M |
| 2 |
Amazon
AMZN
|
$53.1M |
| 3 |
TSMC
TSM
|
$45.7M |
| 4 |
Netflix
NFLX
|
$45.3M |
| 5 |
Pfizer
PFE
|
$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Five Below
FIVE
$8.46B
| $957K | ﹤0.01% |
7,296
-26,586
| -78% | -$3.49M |
|
427
Stellantis
STLA
$26.2B
| $948K | ﹤0.01% |
94,589
-166,952
| -64% | -$1.67M |
|
428
ProShares UltraPro Dow 30
UDOW
$715M
| $943K | ﹤0.01% |
9,991
+7,033
| +238% | +$664K |
|
429
Ollie's Bargain Outlet
OLLI
$8.18B
| $942K | ﹤0.01% |
+7,155
| New | +$942K |
|
430
Invesco KBW Bank ETF
KBWB
$4.87B
| $937K | ﹤0.01% |
13,094
-10,743
| -45% | -$769K |
|
431
ARK Genomic Revolution ETF
ARKG
$1.08B
| $936K | ﹤0.01% |
+38,448
| New | +$936K |
|
432
Ferguson
FERG
$47.8B
| $934K | ﹤0.01% |
+4,293
| New | +$934K |
|
433
Stride
LRN
$7.01B
| $932K | ﹤0.01% |
6,424
-400
| -6% | -$58K |
|
|
UNIT
434
Uniti Group
UNIT
$1.59B
| $931K | ﹤0.01% |
215,674
+151,106
| +234% | +$652K |
|
435
American Eagle Outfitters
AEO
$3.26B
| $927K | ﹤0.01% |
96,397
+76,367
| +381% | +$734K |
|
436
Yum China
YUMC
$16.5B
| $927K | ﹤0.01% |
+20,751
| New | +$927K |
|
437
Bank of America
BAC
$369B
| $926K | ﹤0.01% |
+19,583
| New | +$926K |
|
438
Church & Dwight Co
CHD
$23.3B
| $923K | ﹤0.01% |
9,608
+8,878
| +1,216% | +$853K |
|
439
Union Pacific
UNP
$131B
| $922K | ﹤0.01% |
4,010
+1,547
| +63% | +$356K |
|
440
Upwork
UPWK
$2.15B
| $921K | ﹤0.01% |
68,599
+11,880
| +21% | +$159K |
|
|
ETH
441
Grayscale Ethereum Mini Trust ETF
ETH
$2.18B
| $918K | ﹤0.01% |
+38,733
| New | +$918K |
|
|
VERV
442
DELISTED
Verve Therapeutics
VERV
| $911K | ﹤0.01% |
81,129
+68,549
| +545% | +$770K |
|
443
Arrowhead Research
ARWR
$4.02B
| $905K | ﹤0.01% |
57,307
+215
| +0.4% | +$3.4K |
|
444
Corebridge Financial
CRBG
$18.1B
| $901K | ﹤0.01% |
25,386
-17,090
| -40% | -$607K |
|
445
SPDR S&P MidCap 400 ETF Trust
MDY
$24B
| $900K | ﹤0.01% |
1,590
+888
| +126% | +$503K |
|
446
HEICO
HEI
$44.8B
| $899K | ﹤0.01% |
+2,741
| New | +$899K |
|
447
uniQure
QURE
$985M
| $895K | ﹤0.01% |
64,259
+16,735
| +35% | +$233K |
|
448
FTAI Infrastructure
FIP
$481M
| $894K | ﹤0.01% |
+144,919
| New | +$894K |
|
449
Sturm, Ruger & Co
RGR
$572M
| $893K | ﹤0.01% |
24,875
+9,686
| +64% | +$348K |
|
450
Annaly Capital Management
NLY
$14.2B
| $890K | ﹤0.01% |
+47,304
| New | +$890K |
|