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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
451
Eastman Chemical
EMN
$7.76B
| $938K | ﹤0.01% |
10,452
+10,377
| +13,836% | +$931K |
|
452
SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$11.3B
| $936K | ﹤0.01% |
+16,024
| New | +$936K |
|
453
Macerich
MAC
$4.68B
| $935K | ﹤0.01% |
60,652
+12,736
| +27% | +$196K |
|
454
Winnebago Industries
WGO
$988M
| $934K | ﹤0.01% |
12,821
+7,596
| +145% | +$553K |
|
|
SILV
455
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $918K | ﹤0.01% |
140,175
+71,063
| +103% | +$465K |
|
456
Madrigal Pharmaceuticals
MDGL
$10.1B
| $910K | ﹤0.01% |
3,934
-1,702
| -30% | -$394K |
|
457
iShares Core MSCI EAFE ETF
IEFA
$152B
| $906K | ﹤0.01% |
12,880
+10,685
| +487% | +$752K |
|
458
Nutrien
NTR
$27.9B
| $905K | ﹤0.01% |
16,071
-148,206
| -90% | -$8.35M |
|
459
PTC
PTC
$25.5B
| $896K | ﹤0.01% |
5,126
+4,449
| +657% | +$778K |
|
|
SII
460
Sprott
SII
$1.75B
| $893K | ﹤0.01% |
26,323
+9,810
| +59% | +$333K |
|
461
Corporacion America
CAAP
$3.09B
| $892K | ﹤0.01% |
55,551
+54,679
| +6,271% | +$878K |
|
|
DO
462
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $887K | ﹤0.01% |
+68,304
| New | +$887K |
|
463
GSK
GSK
$82.1B
| $886K | ﹤0.01% |
23,924
-100,539
| -81% | -$3.72M |
|
464
Sensata Technologies
ST
$4.66B
| $886K | ﹤0.01% |
+23,595
| New | +$886K |
|
465
ZIM Integrated Shipping Services
ZIM
$1.6B
| $884K | ﹤0.01% |
89,647
-275,551
| -75% | -$2.72M |
|
466
NexGen Energy
NXE
$4.48B
| $883K | ﹤0.01% |
126,176
-124,050
| -50% | -$868K |
|
467
Southern Copper
SCCO
$84B
| $879K | ﹤0.01% |
10,726
+5
| +0% | +$410 |
|
|
SP
468
DELISTED
SP Plus Corporation
SP
| $879K | ﹤0.01% |
17,152
+17,114
| +45,037% | +$877K |
|
469
Kinross Gold
KGC
$27.3B
| $875K | ﹤0.01% |
144,730
+114,486
| +379% | +$692K |
|
470
Waters Corp
WAT
$18.4B
| $875K | ﹤0.01% |
2,660
-369
| -12% | -$121K |
|
471
Melco Resorts & Entertainment
MLCO
$3.75B
| $873K | ﹤0.01% |
98,496
+16,493
| +20% | +$146K |
|
472
Gen Digital
GEN
$18.4B
| $869K | ﹤0.01% |
+38,110
| New | +$869K |
|
473
Odyssey Marine Exploration
OMEX
$72.3M
| $861K | ﹤0.01% |
185,273
-156,688
| -46% | -$728K |
|
474
Treace Medical Concepts
TMCI
$449M
| $858K | ﹤0.01% |
67,350
+66,559
| +8,415% | +$848K |
|
475
Intrepid Potash
IPI
$390M
| $849K | ﹤0.01% |
+35,566
| New | +$849K |
|