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 | |
|---|---|---|---|---|---|---|
751
Halozyme
HALO
$8.87B
| $155K | ﹤0.01% |
9,071
-491
| -5% | -$8.39K |
|
752
iShares US Healthcare Providers ETF
IHF
$828M
| $155K | ﹤0.01% |
4,525
+3,325
| +277% | +$114K |
|
753
Trex
TREX
$6.43B
| $155K | ﹤0.01% |
+4,342
| New | +$155K |
|
754
Autoliv
ALV
$9.63B
| $154K | ﹤0.01% |
2,186
+1,556
| +247% | +$110K |
|
755
ANI Pharmaceuticals
ANIP
$2.14B
| $153K | ﹤0.01% |
1,864
-2,289
| -55% | -$188K |
|
756
Wave Life Sciences
WVE
$1.14B
| $153K | ﹤0.01% |
5,877
+3,229
| +122% | +$84.1K |
|
|
NVTA
757
DELISTED
Invitae Corporation
NVTA
| $153K | ﹤0.01% |
6,519
-26,004
| -80% | -$610K |
|
|
BIG
758
DELISTED
Big Lots, Inc.
BIG
| $152K | ﹤0.01% |
+5,329
| New | +$152K |
|
759
Daktronics
DAKT
$1.09B
| $151K | ﹤0.01% |
24,585
-5,911
| -19% | -$36.3K |
|
|
RAD
760
DELISTED
Rite Aid Corporation
RAD
| $151K | ﹤0.01% |
18,964
+1,459
| +8% | +$11.6K |
|
761
Badger Meter
BMI
$5.23B
| $150K | ﹤0.01% |
2,518
+1,352
| +116% | +$80.5K |
|
762
Helios Technologies
HLIO
$1.82B
| $150K | ﹤0.01% |
+3,241
| New | +$150K |
|
763
Tronox
TROX
$793M
| $150K | ﹤0.01% |
11,804
+5,974
| +102% | +$75.9K |
|
764
QuidelOrtho
QDEL
$2.03B
| $149K | ﹤0.01% |
2,528
+2,480
| +5,167% | +$146K |
|
765
Helen of Troy
HELE
$567M
| $148K | ﹤0.01% |
+1,135
| New | +$148K |
|
766
Dave & Buster's
PLAY
$796M
| $148K | ﹤0.01% |
+3,672
| New | +$148K |
|
767
Wintrust Financial
WTFC
$9.17B
| $148K | ﹤0.01% |
2,023
-1,632
| -45% | -$119K |
|
|
TLRD
768
DELISTED
Tailored Brands, Inc.
TLRD
| $148K | ﹤0.01% |
25,710
-18,619
| -42% | -$107K |
|
769
Fortuna Silver Mines
FSM
$2.59B
| $147K | ﹤0.01% |
51,633
+42,984
| +497% | +$122K |
|
770
Regis Corp
RGS
$66.7M
| $147K | ﹤0.01% |
446
+227
| +104% | +$74.8K |
|
771
Burlington
BURL
$17.6B
| $146K | ﹤0.01% |
863
-14,375
| -94% | -$2.43M |
|
772
KeyCorp
KEY
$21B
| $146K | ﹤0.01% |
8,263
+5,019
| +155% | +$88.7K |
|
773
ProShares Ultra MSCI Emerging Markets
EET
$28.1M
| $145K | ﹤0.01% |
1,992
+1,900
| +2,065% | +$138K |
|
774
Verisk Analytics
VRSK
$36.7B
| $145K | ﹤0.01% |
+994
| New | +$145K |
|
775
Cimpress
CMPR
$1.44B
| $144K | ﹤0.01% |
1,588
-2,905
| -65% | -$263K |
|