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 |
Alphabet (Google) Class C
GOOG
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
RTI
326
DELISTED
RTI INTL METALS INC(HLDG CO)
RTI
| $297K | 0.03% |
+8,276
| New | +$297K |
|
327
Insmed
INSM
$30.7B
| $294K | 0.03% |
14,160
+12,281
| +654% | +$255K |
|
328
Direxion Daily Energy Bull 2X Shares
ERX
$218M
| $286K | 0.03% |
+523
| New | +$286K |
|
329
Coterra Energy
CTRA
$18.3B
| $284K | 0.03% |
9,625
-7,236
| -43% | -$214K |
|
330
Ford
F
$46.7B
| $283K | 0.03% |
+17,547
| New | +$283K |
|
|
EMES
331
DELISTED
Emerge Energy Services LP
EMES
| $282K | 0.03% |
+5,948
| New | +$282K |
|
332
iShares US Transportation ETF
IYT
$605M
| $280K | 0.03% |
+7,176
| New | +$280K |
|
333
Papa John's
PZZA
$1.58B
| $280K | 0.03% |
+4,540
| New | +$280K |
|
|
DWRE
334
DELISTED
DEMANDWARE INC COM STK (DE)
DWRE
| $278K | 0.03% |
+4,579
| New | +$278K |
|
335
Danaher
DHR
$143B
| $277K | 0.03% |
4,855
-3,115
| -39% | -$178K |
|
336
iShares Europe ETF
IEV
$2.32B
| $277K | 0.03% |
6,272
+5,641
| +894% | +$249K |
|
337
Medtronic
MDT
$119B
| $277K | 0.03% |
3,558
-12,842
| -78% | -$1,000K |
|
|
ASNA
338
DELISTED
Ascena Retail Group, Inc.
ASNA
| $277K | 0.03% |
+957
| New | +$277K |
|
|
EPE
339
DELISTED
EP Energy Corporation
EPE
| $277K | 0.03% |
+26,456
| New | +$277K |
|
340
Liberty Global Class A
LBTYA
$4.05B
| $275K | 0.03% |
6,499
+4,074
| +168% | +$172K |
|
341
ProShares Ultra Financials
UYG
$864M
| $275K | 0.03% |
+11,394
| New | +$275K |
|
|
GG
342
DELISTED
Goldcorp Inc
GG
| $273K | 0.03% |
15,068
+9,266
| +160% | +$168K |
|
343
SPDR S&P China ETF
GXC
$483M
| $272K | 0.03% |
3,216
+3,181
| +9,089% | +$269K |
|
|
CBM
344
DELISTED
Cambrex Corporation
CBM
| $272K | 0.03% |
+6,887
| New | +$272K |
|
|
CY
345
DELISTED
Cypress Semiconductor
CY
| $272K | 0.03% |
+19,332
| New | +$272K |
|
|
I
346
DELISTED
INTELSAT S. A.
I
| $271K | 0.03% |
22,628
+15,013
| +197% | +$180K |
|
347
Amplify Cybersecurity ETF
HACK
$2.29B
| $270K | 0.03% |
+9,665
| New | +$270K |
|
348
NetEase
NTES
$85B
| $270K | 0.03% |
12,850
+1,340
| +12% | +$28.2K |
|
349
Equity Residential
EQR
$25.5B
| $269K | 0.03% |
+3,463
| New | +$269K |
|
350
AvalonBay Communities
AVB
$27.8B
| $268K | 0.03% |
+1,543
| New | +$268K |
|