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 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$16.3M |
| 3 |
Walt Disney
DIS
|
+$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.4M |
| 5 |
Gilead Sciences
GILD
|
+$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$95.3M |
| 2 |
Apple
AAPL
|
+$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
376
Openlane
KAR
$3.11B
| $274K | 0.02% |
20,428
+20,214
| +9,446% | +$271K |
|
377
Lithia Motors
LAD
$8.71B
| $274K | 0.02% |
+2,538
| New | +$274K |
|
378
Lennox International
LII
$20.4B
| $271K | 0.02% |
2,400
+1,075
| +81% | +$121K |
|
379
BlackBerry
BB
$2.23B
| $270K | 0.02% |
44,200
-45,032
| -50% | -$275K |
|
380
United Therapeutics
UTHR
$18.3B
| $269K | 0.02% |
2,051
+1,473
| +255% | +$193K |
|
|
RVNC
381
DELISTED
Revance Therapeutics, Inc.
RVNC
| $269K | 0.02% |
+9,065
| New | +$269K |
|
382
GSK
GSK
$82.1B
| $268K | 0.02% |
5,586
-15,503
| -74% | -$744K |
|
383
Sealed Air
SEE
$4.86B
| $267K | 0.02% |
5,711
-4,463
| -44% | -$209K |
|
|
ARRS
384
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $267K | 0.02% |
10,306
+6,155
| +148% | +$159K |
|
|
INVN
385
DELISTED
Invensense Inc
INVN
| $267K | 0.02% |
28,798
+16,915
| +142% | +$157K |
|
|
XEC
386
DELISTED
CIMAREX ENERGY CO
XEC
| $266K | 0.02% |
2,599
-5,368
| -67% | -$549K |
|
387
Silicon Laboratories
SLAB
$4.42B
| $265K | 0.02% |
6,392
+2,968
| +87% | +$123K |
|
388
Trip.com Group
TCOM
$47.3B
| $265K | 0.02% |
8,402
-45,290
| -84% | -$1.43M |
|
|
DNKN
389
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $265K | 0.02% |
5,420
-15,318
| -74% | -$749K |
|
390
CBRE Group
CBRE
$48.2B
| $264K | 0.02% |
8,261
+5,924
| +253% | +$189K |
|
391
NETSCOUT
NTCT
$1.78B
| $262K | 0.02% |
+7,419
| New | +$262K |
|
|
POM
392
DELISTED
PEPCO HOLDINGS, INC.
POM
| $262K | 0.02% |
10,842
+4,194
| +63% | +$101K |
|
393
Crown Castle
CCI
$40.9B
| $261K | 0.02% |
+3,321
| New | +$261K |
|
|
ATCO
394
DELISTED
Atlas Corp.
ATCO
| $260K | 0.02% |
16,996
-3,526
| -17% | -$53.9K |
|
395
Lands' End
LE
$441M
| $256K | 0.02% |
9,487
+8,188
| +630% | +$221K |
|
396
Sempra
SRE
$51.8B
| $256K | 0.02% |
+5,308
| New | +$256K |
|
397
Box
BOX
$4.86B
| $254K | 0.02% |
20,226
+19,845
| +5,209% | +$249K |
|
398
KB Home
KBH
$4.62B
| $249K | 0.02% |
+18,420
| New | +$249K |
|
|
ADT
399
DELISTED
ADT CORP
ADT
| $248K | 0.02% |
8,323
+3,501
| +73% | +$104K |
|
|
RATE
400
DELISTED
Bankrate Inc
RATE
| $247K | 0.02% |
+23,959
| New | +$247K |
|