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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
651
Shake Shack
SHAK
$4.03B
| $532K | ﹤0.01% |
4,719
+2,518
| +114% | +$284K |
|
652
Sapiens International
SPNS
$2.4B
| $531K | ﹤0.01% |
16,705
+16,624
| +20,523% | +$528K |
|
653
ADT
ADT
$7.13B
| $530K | ﹤0.01% |
62,896
-59,034
| -48% | -$497K |
|
|
ARTY
654
iShares Future AI & Tech ETF
ARTY
$1.37B
| $530K | ﹤0.01% |
12,307
+11,385
| +1,235% | +$490K |
|
655
AutoNation
AN
$8.55B
| $527K | ﹤0.01% |
5,657
+2,050
| +57% | +$191K |
|
656
US Foods
USFD
$17.5B
| $525K | ﹤0.01% |
+13,777
| New | +$525K |
|
657
Glacier Bancorp
GBCI
$5.88B
| $522K | ﹤0.01% |
+9,147
| New | +$522K |
|
658
Taylor Morrison
TMHC
$7.1B
| $522K | ﹤0.01% |
16,950
-2,317
| -12% | -$71.4K |
|
|
YALA
659
Yalla Group
YALA
$1.19B
| $521K | ﹤0.01% |
+20,862
| New | +$521K |
|
660
Direxion Daily Financial Bear 3x Shares
FAZ
$108M
| $520K | ﹤0.01% |
14,968
+12,468
| +499% | +$433K |
|
661
StepStone Group
STEP
$4.78B
| $519K | ﹤0.01% |
+14,718
| New | +$519K |
|
|
BTAQ
662
DELISTED
Burgundy Technology Acquisition Corporation Class A Ordinary shares
BTAQ
| $519K | ﹤0.01% |
+52,552
| New | +$519K |
|
663
MaxLinear
MXL
$1.36B
| $518K | ﹤0.01% |
15,228
-1,188
| -7% | -$40.4K |
|
664
Arrow Electronics
ARW
$6.57B
| $517K | ﹤0.01% |
4,668
+2,430
| +109% | +$269K |
|
665
Energizer
ENR
$1.96B
| $515K | ﹤0.01% |
10,865
+8,284
| +321% | +$393K |
|
666
Rush Street Interactive
RSI
$2.02B
| $513K | ﹤0.01% |
+31,446
| New | +$513K |
|
667
Vornado Realty Trust
VNO
$7.93B
| $511K | ﹤0.01% |
+11,262
| New | +$511K |
|
|
XENT
668
DELISTED
Intersect ENT, Inc
XENT
| $511K | ﹤0.01% |
24,520
+16,377
| +201% | +$341K |
|
669
Silicon Motion
SIMO
$2.8B
| $507K | ﹤0.01% |
8,541
-28,933
| -77% | -$1.72M |
|
670
iShares Core S&P Mid-Cap ETF
IJH
$101B
| $505K | ﹤0.01% |
9,705
-22,345
| -70% | -$1.16M |
|
|
CTXS
671
DELISTED
Citrix Systems Inc
CTXS
| $505K | ﹤0.01% |
3,599
-1,316
| -27% | -$185K |
|
672
iShares MSCI Europe Financials ETF
EUFN
$4.36B
| $504K | ﹤0.01% |
+26,168
| New | +$504K |
|
673
Principal Financial Group
PFG
$17.8B
| $504K | ﹤0.01% |
+8,417
| New | +$504K |
|
674
Vanguard FTSE Developed Markets ETF
VEA
$171B
| $504K | ﹤0.01% |
10,280
-17,386
| -63% | -$852K |
|
675
W.R. Berkley
WRB
$27.3B
| $504K | ﹤0.01% |
+15,057
| New | +$504K |
|