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 | |
|---|---|---|---|---|---|---|
576
Veracyte
VCYT
$2.51B
| $277K | ﹤0.01% |
+9,720
| New | +$277K |
|
|
ZUO
577
DELISTED
Zuora, Inc.
ZUO
| $276K | ﹤0.01% |
18,029
+3,300
| +22% | +$50.5K |
|
578
GoDaddy
GDDY
$20.6B
| $275K | ﹤0.01% |
3,929
+2,800
| +248% | +$196K |
|
579
Unisys
UIS
$291M
| $275K | ﹤0.01% |
28,304
+10,371
| +58% | +$101K |
|
|
TELL
580
DELISTED
Tellurian Inc.
TELL
| $275K | ﹤0.01% |
+35,088
| New | +$275K |
|
581
Advanced Drainage Systems
WMS
$11.4B
| $273K | ﹤0.01% |
+8,349
| New | +$273K |
|
582
Zymeworks
ZYME
$1.24B
| $273K | ﹤0.01% |
12,441
+11,895
| +2,179% | +$261K |
|
583
VirnetX
VHC
$74.6M
| $272K | ﹤0.01% |
2,194
-575
| -21% | -$71.3K |
|
|
VSI
584
DELISTED
Vitamin Shoppe Inc.
VSI
| $272K | ﹤0.01% |
69,036
+27,162
| +65% | +$107K |
|
|
HALL
585
DELISTED
Hallmark Financial Services, Inc.
HALL
| $271K | ﹤0.01% |
+1,905
| New | +$271K |
|
586
ProShares UltraShort MSCI Brazil Capped
BZQ
$5.4M
| $270K | ﹤0.01% |
2,841
-884
| -24% | -$84K |
|
587
Marvell Technology
MRVL
$57.4B
| $270K | ﹤0.01% |
11,312
-37,941
| -77% | -$906K |
|
588
ProShares Short S&P500
SH
$1.22B
| $270K | ﹤0.01% |
+2,544
| New | +$270K |
|
589
Ultra Clean Holdings
UCTT
$1.16B
| $269K | ﹤0.01% |
19,390
-19,213
| -50% | -$267K |
|
590
B2Gold
BTG
$5.89B
| $268K | ﹤0.01% |
88,679
+85,582
| +2,763% | +$259K |
|
|
ZNGA
591
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $268K | ﹤0.01% |
43,868
-28,239
| -39% | -$173K |
|
|
STAY
592
DELISTED
Extended Stay America, Inc. Paired Share Unit
STAY
| $267K | ﹤0.01% |
15,836
-56,914
| -78% | -$960K |
|
593
Viatris
VTRS
$11.9B
| $266K | ﹤0.01% |
+14,015
| New | +$266K |
|
594
Edwards Lifesciences
EW
$45.8B
| $263K | ﹤0.01% |
+4,278
| New | +$263K |
|
595
iShares US Technology ETF
IYW
$23.9B
| $261K | ﹤0.01% |
+5,292
| New | +$261K |
|
596
Check Point Software Technologies
CHKP
$21.1B
| $260K | ﹤0.01% |
2,249
-8,136
| -78% | -$941K |
|
597
EQT Corp
EQT
$31.8B
| $260K | ﹤0.01% |
16,486
-34,831
| -68% | -$549K |
|
598
Chewy
CHWY
$14.9B
| $258K | ﹤0.01% |
+7,386
| New | +$258K |
|
599
Teucrium Soybean Fund
SOYB
$25.4M
| $257K | ﹤0.01% |
16,392
+14,602
| +816% | +$229K |
|
600
Olympic Steel
ZEUS
$378M
| $257K | ﹤0.01% |
18,865
+12,739
| +208% | +$174K |
|