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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
Ambac
AMBC
$413M
| $590K | ﹤0.01% |
52,673
-19,781
| -27% | -$222K |
|
577
RPM International
RPM
$16B
| $590K | ﹤0.01% |
+4,880
| New | +$590K |
|
578
Patterson-UTI
PTEN
$2.11B
| $589K | ﹤0.01% |
77,049
+31,124
| +68% | +$238K |
|
579
Palomar
PLMR
$3.18B
| $575K | ﹤0.01% |
6,075
+2,109
| +53% | +$200K |
|
580
Ultragenyx Pharmaceutical
RARE
$3B
| $574K | ﹤0.01% |
10,347
+5,512
| +114% | +$306K |
|
581
American Superconductor
AMSC
$2.34B
| $571K | ﹤0.01% |
24,195
-7,826
| -24% | -$185K |
|
582
Travere Therapeutics
TVTX
$2.41B
| $566K | ﹤0.01% |
40,461
-40,528
| -50% | -$567K |
|
583
Ambarella
AMBA
$3.56B
| $564K | ﹤0.01% |
+10,011
| New | +$564K |
|
584
Amplify Alternative Harvest ETF
MJ
$178M
| $564K | ﹤0.01% |
14,217
+3,612
| +34% | +$143K |
|
585
Braze
BRZE
$3.37B
| $563K | ﹤0.01% |
17,434
+8,274
| +90% | +$267K |
|
586
Robert Half
RHI
$3.57B
| $563K | ﹤0.01% |
+8,357
| New | +$563K |
|
587
Dutch Bros
BROS
$8.16B
| $561K | ﹤0.01% |
+17,525
| New | +$561K |
|
588
Upwork
UPWK
$2.13B
| $561K | ﹤0.01% |
53,774
+29,082
| +118% | +$303K |
|
589
MSC Industrial Direct
MSM
$5.08B
| $560K | ﹤0.01% |
6,511
-7,338
| -53% | -$631K |
|
590
Sphere Entertainment
SPHR
$1.95B
| $560K | ﹤0.01% |
12,690
-3,309
| -21% | -$146K |
|
591
Invesco S&P 500 Top 50 ETF
XLG
$10.5B
| $560K | ﹤0.01% |
11,793
+6,044
| +105% | +$287K |
|
592
Albertsons Companies
ACI
$10.4B
| $559K | ﹤0.01% |
30,275
+18,217
| +151% | +$336K |
|
|
SERV
593
Serve Robotics
SERV
$658M
| $558K | ﹤0.01% |
+70,229
| New | +$558K |
|
594
Clean Energy Fuels
CLNE
$566M
| $556K | ﹤0.01% |
178,879
+4,682
| +3% | +$14.6K |
|
595
Dine Brands
DIN
$358M
| $556K | ﹤0.01% |
17,815
+10,875
| +157% | +$339K |
|
596
Western Union
WU
$2.75B
| $552K | ﹤0.01% |
46,318
+25,991
| +128% | +$310K |
|
597
Alight
ALIT
$1.89B
| $551K | ﹤0.01% |
+74,546
| New | +$551K |
|
598
Unum
UNM
$12.5B
| $543K | ﹤0.01% |
+9,141
| New | +$543K |
|
599
Valaris
VAL
$3.72B
| $542K | ﹤0.01% |
9,731
-15,483
| -61% | -$862K |
|
600
HF Sinclair
DINO
$9.61B
| $539K | ﹤0.01% |
12,102
+10,610
| +711% | +$473K |
|