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
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
Children's Place
PLCE
$158M
| $533K | ﹤0.01% |
5,590
+1,710
| +44% | +$163K |
|
402
Tucows
TCX
$193M
| $528K | ﹤0.01% |
+8,667
| New | +$528K |
|
403
Valmont Industries
VMI
$7.47B
| $528K | ﹤0.01% |
4,165
-2,959
| -42% | -$375K |
|
404
Melco Resorts & Entertainment
MLCO
$3.82B
| $525K | ﹤0.01% |
24,193
+13,518
| +127% | +$293K |
|
405
BGC Group
BGC
$4.8B
| $523K | ﹤0.01% |
100,088
+5,421
| +6% | +$28.3K |
|
406
Dick's Sporting Goods
DKS
$18.2B
| $520K | ﹤0.01% |
+15,020
| New | +$520K |
|
407
Universal Display
OLED
$6.52B
| $519K | ﹤0.01% |
+2,765
| New | +$519K |
|
|
GWR
408
DELISTED
Genesee & Wyoming Inc.
GWR
| $518K | ﹤0.01% |
+5,189
| New | +$518K |
|
|
EPAY
409
DELISTED
Bottomline Technologies Inc
EPAY
| $517K | ﹤0.01% |
11,706
+6,757
| +137% | +$298K |
|
|
TCO
410
DELISTED
Taubman Centers Inc.
TCO
| $511K | ﹤0.01% |
12,530
+11,885
| +1,843% | +$485K |
|
411
Lincoln Electric
LECO
$13.3B
| $510K | ﹤0.01% |
+6,202
| New | +$510K |
|
412
Citizens Financial Group
CFG
$22.4B
| $507K | ﹤0.01% |
14,347
-7,652
| -35% | -$270K |
|
|
PTR
413
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $507K | ﹤0.01% |
9,215
+4,323
| +88% | +$238K |
|
|
PTLA
414
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $504K | ﹤0.01% |
18,609
-1,101
| -6% | -$29.8K |
|
415
Canadian Natural Resources
CNQ
$64.8B
| $498K | ﹤0.01% |
+37,779
| New | +$498K |
|
416
Stride
LRN
$7.02B
| $498K | ﹤0.01% |
16,379
+7,077
| +76% | +$215K |
|
|
IMMU
417
DELISTED
Immunomedics Inc
IMMU
| $494K | ﹤0.01% |
35,645
-23,171
| -39% | -$321K |
|
418
Avery Dennison
AVY
$12.8B
| $493K | ﹤0.01% |
+4,269
| New | +$493K |
|
|
MOMO
419
Hello Group
MOMO
$1.23B
| $492K | ﹤0.01% |
13,756
+8,314
| +153% | +$297K |
|
420
Sinclair Inc
SBGI
$925M
| $492K | ﹤0.01% |
+9,187
| New | +$492K |
|
|
TEN
421
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $491K | ﹤0.01% |
+44,319
| New | +$491K |
|
422
CACI
CACI
$10.5B
| $489K | ﹤0.01% |
2,391
-733
| -23% | -$150K |
|
423
BorgWarner
BWA
$9.35B
| $485K | ﹤0.01% |
13,144
+9,352
| +247% | +$345K |
|
424
Principal Financial Group
PFG
$17.7B
| $485K | ﹤0.01% |
8,385
+7,938
| +1,776% | +$459K |
|
425
TE Connectivity
TEL
$62.3B
| $483K | ﹤0.01% |
+5,053
| New | +$483K |
|