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 |
Invesco QQQ Trust
QQQ
|
+$92M |
| 2 |
Walt Disney
DIS
|
+$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$12.8M |
| 4 |
Baidu
BIDU
|
+$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
+$61.4M |
| 2 |
Amazon
AMZN
|
+$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$35.5M |
| 4 |
Apple
AAPL
|
+$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
+$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.01% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1401
CNX Resources
CNX
$4.14B
| $12K | ﹤0.01% |
1,204
-260
| -18% | -$2.59K |
|
1402
Denali Therapeutics
DNLI
$2.14B
| $12K | ﹤0.01% |
+543
| New | +$12K |
|
1403
Goosehead Insurance
GSHD
$2.01B
| $12K | ﹤0.01% |
+439
| New | +$12K |
|
1404
HealthStream
HSTM
$839M
| $12K | ﹤0.01% |
+440
| New | +$12K |
|
1405
Ironwood Pharmaceuticals
IRWD
$187M
| $12K | ﹤0.01% |
1,110
-7,907
| -88% | -$85.5K |
|
1406
Middlesex Water
MSEX
$954M
| $12K | ﹤0.01% |
225
+153
| +213% | +$8.16K |
|
1407
Sonic Automotive
SAH
$2.77B
| $12K | ﹤0.01% |
846
-5,748
| -87% | -$81.5K |
|
1408
SPS Commerce
SPSC
$4.18B
| $12K | ﹤0.01% |
+228
| New | +$12K |
|
1409
Towne Bank
TOWN
$2.84B
| $12K | ﹤0.01% |
510
-491
| -49% | -$11.6K |
|
1410
Urban Edge Properties
UE
$2.67B
| $12K | ﹤0.01% |
632
+8
| +1% | +$152 |
|
1411
Vuzix
VUZI
$176M
| $12K | ﹤0.01% |
3,922
-9,064
| -70% | -$27.7K |
|
1412
XBiotech
XBIT
$85.4M
| $12K | ﹤0.01% |
+1,167
| New | +$12K |
|
|
VOXX
1413
DELISTED
VOXX International Corporation Class A
VOXX
| $12K | ﹤0.01% |
2,712
+1,257
| +86% | +$5.56K |
|
|
RRD
1414
DELISTED
RR Donnelley & Sons Co.
RRD
| $12K | ﹤0.01% |
+2,589
| New | +$12K |
|
|
CTST
1415
DELISTED
CannTrust Holdings Inc. Common Share
CTST
| $12K | ﹤0.01% |
+1,595
| New | +$12K |
|
|
BRS
1416
DELISTED
Bristow Group, Inc.
BRS
| $12K | ﹤0.01% |
11,201
+8,390
| +298% | +$8.99K |
|
|
NTP
1417
DELISTED
Nam Tai Property Inc.
NTP
| $12K | ﹤0.01% |
1,271
-2,751
| -68% | -$26K |
|
1418
Global Industrial
GIC
$1.44B
| $11K | ﹤0.01% |
517
-159
| -24% | -$3.38K |
|
1419
Matthews International
MATW
$761M
| $11K | ﹤0.01% |
+315
| New | +$11K |
|
1420
Impinj
PI
$5.34B
| $11K | ﹤0.01% |
683
+325
| +91% | +$5.23K |
|
1421
RPC Inc
RES
$1.02B
| $11K | ﹤0.01% |
999
-668
| -40% | -$7.36K |
|
1422
Cartesian Therapeutics
RNAC
$255M
| $11K | ﹤0.01% |
165
+140
| +560% | +$9.33K |
|
1423
VEON
VEON
$3.56B
| $11K | ﹤0.01% |
+219
| New | +$11K |
|
|
SFE
1424
DELISTED
Safeguard Scientifics, Inc.
SFE
| $11K | ﹤0.01% |
1,019
+706
| +226% | +$7.62K |
|
|
ACGN
1425
DELISTED
Aceragen, Inc. Common Stock
ACGN
| $11K | ﹤0.01% |
+273
| New | +$11K |
|