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 |
Amazon
AMZN
|
$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
$26.1M |
| 4 |
Booking.com
BKNG
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$42.8M |
| 2 |
Amgen
AMGN
|
$32.3M |
| 3 |
Baidu
BIDU
|
$21.9M |
| 4 |
Micron Technology
MU
|
$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Euronet Worldwide
EEFT
$3.74B
| $444K | 0.02% |
+4,691
| New | +$444K |
|
427
ProShares UltraPro Short QQQ
SQQQ
$2.32B
| $444K | 0.02% |
+33
| New | +$444K |
|
428
Darden Restaurants
DRI
$24.5B
| $443K | 0.02% |
+5,633
| New | +$443K |
|
429
Ares Capital
ARCC
$15.8B
| $441K | 0.02% |
+26,907
| New | +$441K |
|
430
Cirrus Logic
CRUS
$5.94B
| $438K | 0.02% |
8,216
+4,443
| +118% | +$237K |
|
|
LOGM
431
DELISTED
LogMein, Inc.
LOGM
| $438K | 0.02% |
+3,984
| New | +$438K |
|
432
Bank of New York Mellon
BK
$73.1B
| $437K | 0.02% |
+8,261
| New | +$437K |
|
433
Citizens Financial Group
CFG
$22.3B
| $437K | 0.02% |
11,541
+6,938
| +151% | +$263K |
|
|
SNC
434
DELISTED
State National Companies, Inc.
SNC
| $436K | 0.02% |
+20,818
| New | +$436K |
|
435
Dolby
DLB
$6.96B
| $433K | 0.02% |
+7,532
| New | +$433K |
|
436
Novanta
NOVT
$4.18B
| $424K | 0.02% |
9,743
+7,495
| +333% | +$326K |
|
437
Vanguard Dividend Appreciation ETF
VIG
$95.8B
| $423K | 0.02% |
4,463
+4,371
| +4,751% | +$414K |
|
438
iShares TIPS Bond ETF
TIP
$13.6B
| $422K | 0.02% |
+3,724
| New | +$422K |
|
|
DATA
439
DELISTED
Tableau Software, Inc.
DATA
| $419K | 0.02% |
5,598
-3,127
| -36% | -$234K |
|
440
FerroAtlántica
GSM
$799M
| $417K | 0.02% |
+31,743
| New | +$417K |
|
441
TEGNA Inc
TGNA
$3.38B
| $416K | 0.02% |
31,210
+460
| +1% | +$6.13K |
|
|
ENDP
442
DELISTED
Endo International plc
ENDP
| $413K | 0.02% |
48,318
+4,451
| +10% | +$38K |
|
|
TVPT
443
DELISTED
Travelport Worldwide Limited
TVPT
| $412K | 0.02% |
26,292
+25,505
| +3,241% | +$400K |
|
444
CyberArk
CYBR
$23.3B
| $409K | 0.02% |
9,977
-21,863
| -69% | -$896K |
|
445
Viasat
VSAT
$3.98B
| $408K | 0.02% |
+6,349
| New | +$408K |
|
|
ARNA
446
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $408K | 0.02% |
16,005
+15,122
| +1,713% | +$385K |
|
|
WES
447
DELISTED
Western Gas Partners Lp
WES
| $408K | 0.02% |
7,963
+3,421
| +75% | +$175K |
|
|
IPHI
448
DELISTED
INPHI CORPORATION
IPHI
| $406K | 0.02% |
+10,243
| New | +$406K |
|
|
HNP
449
DELISTED
Huaneng Power Intl, Inc.
HNP
| $405K | 0.02% |
16,585
+5,224
| +46% | +$128K |
|
|
SPPI
450
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $403K | 0.02% |
28,705
+27,360
| +2,034% | +$384K |
|