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 | |
|---|---|---|---|---|---|---|
1576
Flux Power
FLUX
$30.5M
| $17K | ﹤0.01% |
5,782
+1,367
| +31% | +$4.02K |
|
1577
Jack Henry & Associates
JKHY
$11.7B
| $17K | ﹤0.01% |
+97
| New | +$17K |
|
1578
Markel Group
MKL
$24.7B
| $17K | ﹤0.01% |
11
-206
| -95% | -$318K |
|
1579
NB Bancorp
NBBK
$737M
| $17K | ﹤0.01% |
920
+88
| +11% | +$1.63K |
|
1580
Owens & Minor
OMI
$412M
| $17K | ﹤0.01% |
1,114
-3,877
| -78% | -$59.2K |
|
1581
SPDR Russell 1000 Yield Focus ETF
ONEY
$904M
| $17K | ﹤0.01% |
+154
| New | +$17K |
|
1582
PMV Pharmaceuticals
PMVP
$65.2M
| $17K | ﹤0.01% |
11,711
-19,005
| -62% | -$27.6K |
|
1583
ProShares Short Real Estate
REK
$11.3M
| $17K | ﹤0.01% |
1,109
-164
| -13% | -$2.51K |
|
1584
Astrana Health
ASTH
$1.4B
| $17K | ﹤0.01% |
297
-144
| -33% | -$8.24K |
|
|
FIAT
1585
YieldMax Short COIN Option Income Strategy ETF
FIAT
$38.7M
| $17K | ﹤0.01% |
+925
| New | +$17K |
|
|
USAP
1586
DELISTED
Universal Stainless & Alloy
USAP
| $17K | ﹤0.01% |
456
-231
| -34% | -$8.61K |
|
1587
Advantage Solutions
ADV
$619M
| $16K | ﹤0.01% |
4,888
+3,383
| +225% | +$11.1K |
|
1588
Amprius Technologies
AMPX
$1.02B
| $16K | ﹤0.01% |
14,867
-792
| -5% | -$852 |
|
1589
Aris Water Solutions
ARIS
$787M
| $16K | ﹤0.01% |
983
-1,734
| -64% | -$28.2K |
|
1590
Kirby Corp
KEX
$4.8B
| $16K | ﹤0.01% |
138
-1,800
| -93% | -$209K |
|
1591
CS Disco
LAW
$357M
| $16K | ﹤0.01% |
2,872
+160
| +6% | +$891 |
|
1592
Matrix Service
MTRX
$353M
| $16K | ﹤0.01% |
1,417
+1,232
| +666% | +$13.9K |
|
1593
Invesco Building & Construction ETF
PKB
$331M
| $16K | ﹤0.01% |
204
+71
| +53% | +$5.57K |
|
1594
Invesco Semiconductors ETF
PSI
$907M
| $16K | ﹤0.01% |
284
+265
| +1,395% | +$14.9K |
|
|
SEVN
1595
Seven Hills Realty Trust
SEVN
$163M
| $16K | ﹤0.01% |
+1,181
| New | +$16K |
|
1596
Sutro Biopharma
STRO
$74.3M
| $16K | ﹤0.01% |
4,844
+130
| +3% | +$429 |
|
1597
Latham Group
SWIM
$916M
| $16K | ﹤0.01% |
2,465
+1,553
| +170% | +$10.1K |
|
1598
Entrada Therapeutics
TRDA
$201M
| $16K | ﹤0.01% |
+1,017
| New | +$16K |
|
1599
Voyager Therapeutics
VYGR
$232M
| $16K | ﹤0.01% |
2,904
-1,068
| -27% | -$5.88K |
|
1600
Werner Enterprises
WERN
$1.68B
| $16K | ﹤0.01% |
422
+401
| +1,910% | +$15.2K |
|