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 |
Apple
AAPL
|
+$186M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$86.2M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 4 |
iShares Silver Trust
SLV
|
+$42.9M |
| 5 |
Advanced Micro Devices
AMD
|
+$36.5M |
Top Sells
| 1 |
Occidental Petroleum
OXY
|
+$44.4M |
| 2 |
Financial Select Sector SPDR Fund
XLF
|
+$42.8M |
| 3 |
Verizon
VZ
|
+$40.8M |
| 4 |
Direxion Daily S&P 500 Bull 3x Shares
SPXL
|
+$33.6M |
| 5 |
iShares China Large-Cap ETF
FXI
|
+$33M |
Sector Composition
| 1 | Technology | 23.31% |
| 2 | Consumer Discretionary | 13.02% |
| 3 | Industrials | 8.23% |
| 4 | Healthcare | 7.47% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
RUBY
676
DELISTED
Rubius Therapeutics, Inc
RUBY
| $585K | ﹤0.01% |
106,220
+103,593
| +3,943% | +$571K |
|
|
OSH
677
DELISTED
Oak Street Health, Inc.
OSH
| $583K | ﹤0.01% |
21,708
-5,904
| -21% | -$159K |
|
678
Procore
PCOR
$10.4B
| $579K | ﹤0.01% |
+10,001
| New | +$579K |
|
679
AerCap
AER
$21.6B
| $577K | ﹤0.01% |
11,477
+1,175
| +11% | +$59.1K |
|
680
Alpha and Omega Semiconductor
AOSL
$843M
| $577K | ﹤0.01% |
10,572
+6,101
| +136% | +$333K |
|
681
UDR
UDR
$12.8B
| $577K | ﹤0.01% |
+10,074
| New | +$577K |
|
682
Direxion Daily Financial Bull 3x Shares
FAS
$2.58B
| $575K | ﹤0.01% |
4,896
-17,597
| -78% | -$2.07M |
|
683
Archer Aviation
ACHR
$5.48B
| $574K | ﹤0.01% |
119,369
+115,885
| +3,326% | +$557K |
|
684
iShares MSCI Hong Kong ETF
EWH
$729M
| $574K | ﹤0.01% |
25,447
-9,119
| -26% | -$206K |
|
|
TVTY
685
DELISTED
Tivity Health, Inc. Common Stock
TVTY
| $574K | ﹤0.01% |
+17,857
| New | +$574K |
|
686
Suburban Propane Partners
SPH
$1.21B
| $572K | ﹤0.01% |
35,567
-25,744
| -42% | -$414K |
|
687
Outdoor Holding Company Common Stock
POWW
$169M
| $566K | ﹤0.01% |
+118,101
| New | +$566K |
|
688
Lumen
LUMN
$6.13B
| $564K | ﹤0.01% |
+50,131
| New | +$564K |
|
|
TEN
689
Tsakos Energy Navigation Ltd.
TEN
$654M
| $564K | ﹤0.01% |
64,253
+62,494
| +3,553% | +$549K |
|
690
Murphy Oil
MUR
$3.61B
| $563K | ﹤0.01% |
+13,961
| New | +$563K |
|
691
Builders FirstSource
BLDR
$15.6B
| $562K | ﹤0.01% |
8,710
+6,903
| +382% | +$445K |
|
|
BBBY
692
Bed Bath & Beyond, Inc.
BBBY
$624M
| $562K | ﹤0.01% |
+12,776
| New | +$562K |
|
693
The Honest Company
HNST
$436M
| $562K | ﹤0.01% |
107,891
+77,836
| +259% | +$405K |
|
694
Hologic
HOLX
$14.7B
| $561K | ﹤0.01% |
+7,307
| New | +$561K |
|
695
Affiliated Managers Group
AMG
$6.61B
| $559K | ﹤0.01% |
3,970
+1,496
| +60% | +$211K |
|
696
ProShares UltraPro Short 20+ Year Treasury
TTT
$22.3M
| $558K | ﹤0.01% |
13,744
+7,422
| +117% | +$301K |
|
|
NSTB
697
DELISTED
Northern Star Investment Corp. II
NSTB
| $557K | ﹤0.01% |
57,051
+51,430
| +915% | +$502K |
|
|
HBP
698
DELISTED
Huttig Building Products, Inc.
HBP
| $557K | ﹤0.01% |
52,253
+4,453
| +9% | +$47.5K |
|
|
NXDR
699
Nextdoor Holdings
NXDR
$782M
| $555K | ﹤0.01% |
92,708
+70,223
| +312% | +$420K |
|
700
Fortuna Silver Mines
FSM
$2.38B
| $553K | ﹤0.01% |
145,327
+83,183
| +134% | +$317K |
|