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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ARR
626
Armour Residential REIT
ARR
$1.74B
| $430K | ﹤0.01% |
17,667
+14,555
| +468% | +$354K |
|
627
Marqeta
MQ
$2.68B
| $430K | ﹤0.01% |
60,416
+17,034
| +39% | +$121K |
|
628
Cenovus Energy
CVE
$30.7B
| $429K | ﹤0.01% |
27,960
+537
| +2% | +$8.24K |
|
629
Aegon
AEG
$12B
| $425K | ﹤0.01% |
+107,482
| New | +$425K |
|
630
Geron
GERN
$836M
| $425K | ﹤0.01% |
+181,914
| New | +$425K |
|
631
United States 12 Month Oil Fund,
USL
$42.8M
| $424K | ﹤0.01% |
13,061
-6,483
| -33% | -$210K |
|
632
abrdn Physical Silver Shares ETF
SIVR
$2.55B
| $423K | ﹤0.01% |
23,194
+20,032
| +634% | +$365K |
|
633
Nu Holdings
NU
$75.9B
| $422K | ﹤0.01% |
+95,950
| New | +$422K |
|
634
Boeing
BA
$172B
| $421K | ﹤0.01% |
3,482
-65,997
| -95% | -$7.98M |
|
635
Celanese
CE
$5.01B
| $421K | ﹤0.01% |
4,668
+3,950
| +550% | +$356K |
|
636
Southern Copper
SCCO
$84.3B
| $419K | ﹤0.01% |
+9,829
| New | +$419K |
|
637
EXL Service
EXLS
$7.01B
| $418K | ﹤0.01% |
14,195
-65,895
| -82% | -$1.94M |
|
638
Huntington Bancshares
HBAN
$25.9B
| $418K | ﹤0.01% |
31,723
-48,772
| -61% | -$643K |
|
639
Technology Select Sector SPDR Fund
XLK
$86.6B
| $415K | ﹤0.01% |
3,500
+460
| +15% | +$54.5K |
|
640
ARK Fintech Innovation ETF
ARKF
$1.37B
| $414K | ﹤0.01% |
26,915
-182,380
| -87% | -$2.81M |
|
641
Capricor Therapeutics
CAPR
$288M
| $414K | ﹤0.01% |
69,129
+52,528
| +316% | +$315K |
|
642
Vanguard Utilities ETF
VPU
$7.31B
| $413K | ﹤0.01% |
2,909
+1,812
| +165% | +$257K |
|
|
ISEE
643
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $411K | ﹤0.01% |
22,923
-31,915
| -58% | -$572K |
|
644
Warrior Met Coal
HCC
$3.14B
| $410K | ﹤0.01% |
+14,445
| New | +$410K |
|
|
QUOT
645
DELISTED
Quotient Technology Inc
QUOT
| $410K | ﹤0.01% |
177,540
+163,734
| +1,186% | +$378K |
|
646
Mattel
MAT
$5.8B
| $407K | ﹤0.01% |
+21,500
| New | +$407K |
|
647
Westlake Corp
WLK
$11.3B
| $406K | ﹤0.01% |
4,682
+288
| +7% | +$25K |
|
|
STSA
648
DELISTED
Satsuma Pharmaceuticals, Inc. Common Stock
STSA
| $406K | ﹤0.01% |
+67,823
| New | +$406K |
|
649
Macerich
MAC
$4.57B
| $403K | ﹤0.01% |
+50,793
| New | +$403K |
|
650
Blink Charging
BLNK
$141M
| $402K | ﹤0.01% |
22,713
+20,813
| +1,095% | +$368K |
|