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 |
Amazon
AMZN
|
+$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$68.7M |
| 3 |
AT&T
T
|
+$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
+$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
+$94.2M |
| 2 |
Citigroup
C
|
+$62.3M |
| 3 |
JPMorgan Chase
JPM
|
+$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
+$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
Darden Restaurants
DRI
$24.7B
| $705K | ﹤0.01% |
+5,098
| New | +$705K |
|
402
Rogers Corp
ROG
$1.44B
| $704K | ﹤0.01% |
+5,900
| New | +$704K |
|
403
Blue Owl Capital
OWL
$12.1B
| $703K | ﹤0.01% |
66,408
-26,379
| -28% | -$279K |
|
|
FLG
404
Flagstar Financial, Inc.
FLG
$5.24B
| $703K | ﹤0.01% |
+27,262
| New | +$703K |
|
|
HDRO
405
DELISTED
Defiance Next Gen H2 ETF
HDRO
| $703K | ﹤0.01% |
+9,367
| New | +$703K |
|
406
Domino's
DPZ
$15.3B
| $702K | ﹤0.01% |
2,027
-2,806
| -58% | -$972K |
|
407
Stratasys
SSYS
$834M
| $697K | ﹤0.01% |
58,785
-128,286
| -69% | -$1.52M |
|
408
Kosmos Energy
KOS
$832M
| $693K | ﹤0.01% |
109,060
+25,624
| +31% | +$163K |
|
409
ProShares Short VIX Short-Term Futures ETF
SVXY
$251M
| $693K | ﹤0.01% |
23,622
+7,658
| +48% | +$225K |
|
410
Aurinia Pharmaceuticals
AUPH
$1.61B
| $690K | ﹤0.01% |
159,900
+150,792
| +1,656% | +$651K |
|
411
Signet Jewelers
SIG
$3.75B
| $689K | ﹤0.01% |
10,146
+7,628
| +303% | +$518K |
|
412
Alto Ingredients
ALTO
$89M
| $685K | ﹤0.01% |
238,145
+54,181
| +29% | +$156K |
|
413
Nokia
NOK
$24.6B
| $684K | ﹤0.01% |
+147,457
| New | +$684K |
|
414
Tencent Music
TME
$39.2B
| $682K | ﹤0.01% |
82,448
-122,465
| -60% | -$1.01M |
|
415
Samsara
IOT
$22.1B
| $679K | ﹤0.01% |
+54,628
| New | +$679K |
|
416
Costamare
CMRE
$1.46B
| $678K | ﹤0.01% |
73,105
+58,798
| +411% | +$545K |
|
417
Labcorp
LH
$22.7B
| $676K | ﹤0.01% |
3,342
+2,812
| +531% | +$569K |
|
|
DEN
418
DELISTED
Denbury Inc.
DEN
| $673K | ﹤0.01% |
7,739
-2,646
| -25% | -$230K |
|
419
Bain Capital Specialty
BCSF
$1B
| $672K | ﹤0.01% |
56,488
+29,930
| +113% | +$356K |
|
420
ProShares UltraShort Euro
EUO
$33.8M
| $672K | ﹤0.01% |
+22,848
| New | +$672K |
|
421
Delta Air Lines
DAL
$40.1B
| $667K | ﹤0.01% |
20,304
-337,172
| -94% | -$11.1M |
|
422
Copart
CPRT
$46.9B
| $665K | ﹤0.01% |
+21,866
| New | +$665K |
|
423
Boeing
BA
$172B
| $663K | ﹤0.01% |
3,482
| – | – |
|
424
Synovus
SNV
$7.13B
| $663K | ﹤0.01% |
+17,674
| New | +$663K |
|
425
ProShares UltraPro Short Dow 30
SDOW
$175M
| $662K | ﹤0.01% |
6,148
+4,149
| +208% | +$447K |
|