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
|
+$60M |
| 2 |
Microsoft
MSFT
|
+$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.5M |
| 4 |
PayPal
PYPL
|
+$40.9M |
| 5 |
Netflix
NFLX
|
+$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
+$48.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
Adobe
ADBE
|
+$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 5 |
Enphase Energy
ENPH
|
+$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
976
Halozyme
HALO
$9.07B
| $120K | ﹤0.01% |
+3,339
| New | +$120K |
|
|
SAGE
977
DELISTED
Sage Therapeutics
SAGE
| $120K | ﹤0.01% |
+2,562
| New | +$120K |
|
978
VSE Corp
VSEC
$3.45B
| $120K | ﹤0.01% |
+2,196
| New | +$120K |
|
979
Dover
DOV
$24.1B
| $119K | ﹤0.01% |
+811
| New | +$119K |
|
980
Energy Vault
NRGV
$329M
| $118K | ﹤0.01% |
43,327
-6,054
| -12% | -$16.5K |
|
981
Adient
ADNT
$1.92B
| $118K | ﹤0.01% |
3,087
+2,750
| +816% | +$105K |
|
|
CMLS
982
DELISTED
Cumulus Media Inc. Class A Common Stock
CMLS
| $118K | ﹤0.01% |
+28,972
| New | +$118K |
|
983
Pilgrim's Pride
PPC
$10.3B
| $117K | ﹤0.01% |
5,486
+1,507
| +38% | +$32.1K |
|
984
Rekor Systems
REKR
$150M
| $117K | ﹤0.01% |
+66,195
| New | +$117K |
|
985
Pagaya Technologies
PGY
$2.92B
| $116K | ﹤0.01% |
6,961
+6,398
| +1,136% | +$107K |
|
986
Coca-Cola Europacific Partners
CCEP
$40.9B
| $115K | ﹤0.01% |
+1,792
| New | +$115K |
|
987
Magnachip Semiconductor
MX
$110M
| $115K | ﹤0.01% |
10,361
-16,163
| -61% | -$179K |
|
988
Rayonier Advanced Materials
RYAM
$402M
| $115K | ﹤0.01% |
26,971
-56,366
| -68% | -$240K |
|
989
Autohome
ATHM
$3.4B
| $114K | ﹤0.01% |
3,923
-1,033
| -21% | -$30K |
|
990
POET Technologies
POET
$484M
| $114K | ﹤0.01% |
26,007
+25,619
| +6,603% | +$112K |
|
991
Avery Dennison
AVY
$13.1B
| $113K | ﹤0.01% |
+661
| New | +$113K |
|
992
LPL Financial
LPLA
$27.8B
| $113K | ﹤0.01% |
522
-6,266
| -92% | -$1.36M |
|
993
MediaAlpha
MAX
$684M
| $113K | ﹤0.01% |
+11,008
| New | +$113K |
|
994
Magnolia Oil & Gas
MGY
$4.5B
| $113K | ﹤0.01% |
5,431
+3,440
| +173% | +$71.6K |
|
|
RDNW
995
RideNow Group, Inc. Class B Common Stock
RDNW
$154M
| $113K | ﹤0.01% |
9,189
+5,817
| +173% | +$71.5K |
|
996
abrdn Physical Gold Shares ETF
SGOL
$5.79B
| $113K | ﹤0.01% |
6,171
-22,429
| -78% | -$411K |
|
997
STAG Industrial
STAG
$6.68B
| $112K | ﹤0.01% |
3,130
-222
| -7% | -$7.94K |
|
998
Endava
DAVA
$543M
| $112K | ﹤0.01% |
2,181
+2,179
| +108,950% | +$112K |
|
999
KraneShares MSCI China Clean Technology Index ETF
KGRN
$65.3M
| $112K | ﹤0.01% |
4,029
+2,552
| +173% | +$70.9K |
|
1000
Mid-America Apartment Communities
MAA
$16.6B
| $112K | ﹤0.01% |
739
-922
| -56% | -$140K |
|