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 | |
|---|---|---|---|---|---|---|
901
Travelers Companies
TRV
$61.3B
| $95K | ﹤0.01% |
695
-21,735
| -97% | -$2.97M |
|
|
AMAG
902
DELISTED
AMAG Pharmaceuticals, Inc.
AMAG
| $95K | ﹤0.01% |
+7,400
| New | +$95K |
|
903
F5
FFIV
$18.8B
| $94K | ﹤0.01% |
+600
| New | +$94K |
|
904
FMC
FMC
$4.61B
| $94K | ﹤0.01% |
1,225
-715
| -37% | -$54.9K |
|
|
NOAH
905
Noah Holdings
NOAH
$787M
| $94K | ﹤0.01% |
1,946
+1,492
| +329% | +$72.1K |
|
906
NETGEAR
NTGR
$823M
| $94K | ﹤0.01% |
2,852
+2,485
| +677% | +$81.9K |
|
907
Schneider National
SNDR
$4.18B
| $94K | ﹤0.01% |
4,509
+3,016
| +202% | +$62.9K |
|
|
CDMO
908
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $94K | ﹤0.01% |
22,244
+6,064
| +37% | +$25.6K |
|
|
FM
909
DELISTED
iShares Frontier and Select EM ETF
FM
| $94K | ﹤0.01% |
+3,319
| New | +$94K |
|
910
BlackLine
BL
$3.32B
| $93K | ﹤0.01% |
+2,023
| New | +$93K |
|
911
Cogent Communications
CCOI
$1.74B
| $93K | ﹤0.01% |
+1,715
| New | +$93K |
|
912
ImmunityBio
IBRX
$2.43B
| $93K | ﹤0.01% |
59,239
+45,217
| +322% | +$71K |
|
913
Sanmina
SANM
$6.53B
| $93K | ﹤0.01% |
3,242
+2,114
| +187% | +$60.6K |
|
|
TGI
914
DELISTED
Triumph Group
TGI
| $93K | ﹤0.01% |
4,917
+3,714
| +309% | +$70.2K |
|
|
AVID
915
DELISTED
Avid Technology Inc
AVID
| $93K | ﹤0.01% |
+12,582
| New | +$93K |
|
916
iShares MSCI Singapore ETF
EWS
$816M
| $92K | ﹤0.01% |
3,893
+1,266
| +48% | +$29.9K |
|
917
Global Payments
GPN
$20.6B
| $92K | ﹤0.01% |
678
-1,838
| -73% | -$249K |
|
|
VCRA
918
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $92K | ﹤0.01% |
2,912
-25,255
| -90% | -$798K |
|
|
FPRX
919
DELISTED
Five Prime Therapeutics, Inc.
FPRX
| $92K | ﹤0.01% |
6,888
-231
| -3% | -$3.09K |
|
920
Marker Therapeutics
MRKR
$11.8M
| $91K | ﹤0.01% |
+1,387
| New | +$91K |
|
921
Rapid7
RPD
$1.26B
| $91K | ﹤0.01% |
+1,816
| New | +$91K |
|
922
Avnet
AVT
$4.5B
| $90K | ﹤0.01% |
2,094
-389
| -16% | -$16.7K |
|
923
Sangamo Therapeutics
SGMO
$160M
| $90K | ﹤0.01% |
9,450
-30,730
| -76% | -$293K |
|
924
ScottsMiracle-Gro
SMG
$3.5B
| $90K | ﹤0.01% |
1,146
-1,616
| -59% | -$127K |
|
|
TWTR
925
DELISTED
Twitter, Inc.
TWTR
| $90K | ﹤0.01% |
2,762
-9,436
| -77% | -$307K |
|