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 | |
|---|---|---|---|---|---|---|
526
Veeva Systems
VEEV
$44.7B
| $735K | ﹤0.01% |
+2,814
| New | +$735K |
|
527
HSBC
HSBC
$227B
| $733K | ﹤0.01% |
25,156
-19,565
| -44% | -$570K |
|
528
Allogene Therapeutics
ALLO
$255M
| $730K | ﹤0.01% |
20,682
+19,959
| +2,761% | +$704K |
|
529
Fastly
FSLY
$1.1B
| $727K | ﹤0.01% |
10,807
+9,057
| +518% | +$609K |
|
|
BERY
530
DELISTED
Berry Global Group, Inc.
BERY
| $726K | ﹤0.01% |
+12,884
| New | +$726K |
|
531
Bio-Techne
TECH
$8.46B
| $725K | ﹤0.01% |
7,596
+3,888
| +105% | +$371K |
|
532
Acadia Healthcare
ACHC
$2.19B
| $723K | ﹤0.01% |
12,663
+10,934
| +632% | +$624K |
|
|
AIV
533
Aimco
AIV
$1.11B
| $721K | ﹤0.01% |
117,522
+117,472
| +234,944% | +$721K |
|
534
Ironwood Pharmaceuticals
IRWD
$188M
| $714K | ﹤0.01% |
+63,937
| New | +$714K |
|
535
Comerica
CMA
$8.85B
| $713K | ﹤0.01% |
+9,950
| New | +$713K |
|
|
STMP
536
DELISTED
Stamps.com, Inc.
STMP
| $711K | ﹤0.01% |
3,567
+1,763
| +98% | +$351K |
|
|
EGIO
537
DELISTED
Edgio, Inc. Common Stock
EGIO
| $709K | ﹤0.01% |
4,970
+1,031
| +26% | +$147K |
|
538
Pitney Bowes
PBI
$2.11B
| $707K | ﹤0.01% |
85,875
+51,887
| +153% | +$427K |
|
|
QTT
539
DELISTED
Qutoutiao Inc. American Depositary Shares
QTT
| $702K | ﹤0.01% |
30,660
+28,159
| +1,126% | +$645K |
|
540
Asbury Automotive
ABG
$5.06B
| $701K | ﹤0.01% |
3,571
+2,918
| +447% | +$573K |
|
|
LX
541
LexinFintech Holdings
LX
$1.02B
| $701K | ﹤0.01% |
69,716
-765
| -1% | -$7.69K |
|
|
TEN
542
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $696K | ﹤0.01% |
64,930
+48,170
| +287% | +$516K |
|
|
SWIR
543
DELISTED
Sierra Wireless
SWIR
| $689K | ﹤0.01% |
46,708
-37,496
| -45% | -$553K |
|
|
NEX
544
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $686K | ﹤0.01% |
184,541
+178,714
| +3,067% | +$664K |
|
545
Liberty Global Class C
LBTYK
$4.12B
| $681K | ﹤0.01% |
26,667
-11,196
| -30% | -$286K |
|
546
Disc Medicine
IRON
$2.11B
| $680K | ﹤0.01% |
+1,674
| New | +$680K |
|
547
Equifax
EFX
$30.8B
| $677K | ﹤0.01% |
3,742
-9,954
| -73% | -$1.8M |
|
548
Seres Therapeutics
MCRB
$169M
| $672K | ﹤0.01% |
1,632
+1,076
| +194% | +$443K |
|
549
Aecom
ACM
$16.8B
| $666K | ﹤0.01% |
10,391
-10,504
| -50% | -$673K |
|
550
O'Reilly Automotive
ORLY
$89B
| $664K | ﹤0.01% |
+19,650
| New | +$664K |
|