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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
901
Rambus
RMBS
$9.52B
| $187K | ﹤0.01% |
+4,450
| New | +$187K |
|
902
DoubleVerify
DV
$2.28B
| $185K | ﹤0.01% |
11,010
-1,692
| -13% | -$28.4K |
|
903
Napco Security Technologies
NSSC
$1.48B
| $185K | ﹤0.01% |
+4,594
| New | +$185K |
|
904
loanDepot
LDI
$886M
| $183K | ﹤0.01% |
67,042
+59,531
| +793% | +$162K |
|
|
RC
905
Ready Capital
RC
$698M
| $183K | ﹤0.01% |
+23,986
| New | +$183K |
|
906
Allot
ALLT
$433M
| $182K | ﹤0.01% |
61,508
+36,250
| +144% | +$107K |
|
907
UFP Technologies
UFPT
$1.55B
| $182K | ﹤0.01% |
575
-629
| -52% | -$199K |
|
908
ChargePoint
CHPT
$235M
| $180K | ﹤0.01% |
6,588
-8,830
| -57% | -$241K |
|
909
GoodRx Holdings
GDRX
$1.47B
| $180K | ﹤0.01% |
26,068
+23,274
| +833% | +$161K |
|
910
TETRA Technologies
TTI
$644M
| $180K | ﹤0.01% |
58,068
-127,942
| -69% | -$397K |
|
911
Jefferies Financial Group
JEF
$13.8B
| $179K | ﹤0.01% |
2,909
-21,364
| -88% | -$1.31M |
|
912
GraniteShares ETF Trust GraniteShares 2x Long NVDA Daily ETF
NVDL
$4.46B
| $179K | ﹤0.01% |
3,092
-103,674
| -97% | -$6M |
|
913
Blend Labs
BLND
$1.12B
| $178K | ﹤0.01% |
47,630
+44,875
| +1,629% | +$168K |
|
914
Fulcrum Therapeutics
FULC
$377M
| $177K | ﹤0.01% |
49,764
-7,369
| -13% | -$26.2K |
|
915
Navitas Semiconductor
NVTS
$1.3B
| $177K | ﹤0.01% |
72,564
+39,287
| +118% | +$95.8K |
|
916
ProShares UltraShort S&P500
SDS
$467M
| $177K | ﹤0.01% |
8,581
+2,720
| +46% | +$56.1K |
|
917
Teucrium Corn Fund
CORN
$48.8M
| $176K | ﹤0.01% |
9,524
-1,344
| -12% | -$24.8K |
|
918
Allegion
ALLE
$15.2B
| $175K | ﹤0.01% |
1,202
+1,112
| +1,236% | +$162K |
|
919
Cellebrite
CLBT
$4.2B
| $175K | ﹤0.01% |
10,396
-63,291
| -86% | -$1.07M |
|
920
Editas Medicine
EDIT
$244M
| $175K | ﹤0.01% |
51,376
-18,916
| -27% | -$64.4K |
|
921
Targa Resources
TRGP
$35.5B
| $174K | ﹤0.01% |
+1,178
| New | +$174K |
|
922
SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$41.8B
| $173K | ﹤0.01% |
+1,885
| New | +$173K |
|
923
PIMCO 15+ Year US TIPS Index Exchange-Traded Fund
LTPZ
$700M
| $173K | ﹤0.01% |
+2,998
| New | +$173K |
|
924
Direxion Daily NVDA Bull 2X Shares
NVDU
$691M
| $173K | ﹤0.01% |
1,853
-1,693
| -48% | -$158K |
|
|
CTLT
925
DELISTED
CATALENT, INC.
CTLT
| $173K | ﹤0.01% |
+2,860
| New | +$173K |
|