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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1401
Malibu Boats
MBUU
$640M
| $106K | ﹤0.01% |
1,341
-3,986
| -75% | -$315K |
|
1402
Navigator Holdings
NVGS
$1.12B
| $106K | ﹤0.01% |
+11,974
| New | +$106K |
|
|
PLYA
1403
DELISTED
Playa Hotels & Resorts
PLYA
| $106K | ﹤0.01% |
14,639
-8,466
| -37% | -$61.3K |
|
1404
Westlake Corp
WLK
$11.2B
| $106K | ﹤0.01% |
+1,201
| New | +$106K |
|
|
AHH
1405
Armada Hoffler Properties
AHH
$600M
| $105K | ﹤0.01% |
8,413
-6,119
| -42% | -$76.4K |
|
1406
Green Plains
GPRE
$630M
| $105K | ﹤0.01% |
+3,895
| New | +$105K |
|
1407
Imperial Oil
IMO
$48.1B
| $105K | ﹤0.01% |
+4,359
| New | +$105K |
|
1408
Schwab US Large-Cap Value ETF
SCHV
$13.6B
| $105K | ﹤0.01% |
4,860
+3,282
| +208% | +$70.9K |
|
|
TOUR
1409
Tuniu
TOUR
$109M
| $105K | ﹤0.01% |
30,350
+4,844
| +19% | +$16.8K |
|
1410
WisdomTree US LargeCap Dividend Fund
DLN
$5.33B
| $104K | ﹤0.01% |
1,822
-644
| -26% | -$36.8K |
|
1411
Amplify Online Retail ETF
IBUY
$163M
| $104K | ﹤0.01% |
841
-4,941
| -85% | -$611K |
|
1412
Morningstar
MORN
$10.5B
| $104K | ﹤0.01% |
+465
| New | +$104K |
|
1413
Q2 Holdings
QTWO
$5.18B
| $104K | ﹤0.01% |
1,038
-137
| -12% | -$13.7K |
|
|
NARI
1414
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $104K | ﹤0.01% |
+978
| New | +$104K |
|
1415
Choice Hotels
CHH
$5.14B
| $103K | ﹤0.01% |
966
-563
| -37% | -$60K |
|
1416
Comstock
LODE
$141M
| $103K | ﹤0.01% |
2,267
+596
| +36% | +$27.1K |
|
|
SWCH
1417
DELISTED
Switch, Inc. Class A Common Stock
SWCH
| $103K | ﹤0.01% |
6,336
-17,462
| -73% | -$284K |
|
1418
Atkore
ATKR
$2.01B
| $102K | ﹤0.01% |
+1,420
| New | +$102K |
|
|
CIM
1419
Chimera Investment
CIM
$1.13B
| $102K | ﹤0.01% |
2,693
-3,046
| -53% | -$115K |
|
1420
Schwab U.S Small- Cap ETF
SCHA
$18.8B
| $102K | ﹤0.01% |
+4,120
| New | +$102K |
|
1421
Vanguard Extended Market ETF
VXF
$24.4B
| $102K | ﹤0.01% |
580
-186
| -24% | -$32.7K |
|
1422
Global X Video Games & Esports ETF
HERO
$175M
| $101K | ﹤0.01% |
3,226
-2,597
| -45% | -$81.3K |
|
|
VRN
1423
DELISTED
Veren
VRN
| $101K | ﹤0.01% |
+24,390
| New | +$101K |
|
1424
Assembly Biosciences
ASMB
$158M
| $100K | ﹤0.01% |
1,817
+1,745
| +2,424% | +$96K |
|
1425
BioCardia
BCDA
$8.88M
| $100K | ﹤0.01% |
+1,543
| New | +$100K |
|