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 | +$73.1M | |
| 2 | +$51.8M | |
| 3 | +$46M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$41.8M |
| 5 |
Alibaba
BABA
|
+$37.1M |
Top Sells
| 1 | +$262M | |
| 2 | +$194M | |
| 3 | +$149M | |
| 4 |
Apple
AAPL
|
+$119M |
| 5 |
Amazon
AMZN
|
+$107M |
Sector Composition
| 1 | Technology | 29.67% |
| 2 | Consumer Discretionary | 10.7% |
| 3 | Healthcare | 10.12% |
| 4 | Industrials | 8.86% |
| 5 | Communication Services | 7.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
401
Zymeworks
ZYME
$1.86B
| $1.26M | 0.04% |
48,040
+19,279
|
|
||
402
Northrop Grumman
NOC
$76.9B
| $1.26M | 0.04% |
+2,206
|
|
||
403
Janus Henderson B-BBB CLO ETF
JBBB
$1.2B
| $1.26M | 0.04% |
26,338
+22,488
|
|
||
|
PONY
404
Pony AI Inc
PONY
$4.11B
| $1.25M | 0.04% |
+86,008
|
|
||
405
BigBear.ai
BBAI
$2.28B
| $1.24M | 0.04% |
230,225
-187,483
|
|
||
406
Capri Holdings
CPRI
$2.17B
| $1.24M | 0.03% |
50,851
+46,309
|
|
||
407
Banco Macro
BMA
$5.59B
| $1.24M | 0.03% |
13,731
-20,883
|
|
||
408
Immunovant
IMVT
$6.73B
| $1.23M | 0.03% |
48,411
+33,479
|
|
||
409
Yext
YEXT
$398M
| $1.23M | 0.03% |
152,479
+136,538
|
|
||
410
Nasdaq
NDAQ
$50.2B
| $1.23M | 0.03% |
12,647
-9,394
|
|
||
411
Paychex
PAYX
$35.6B
| $1.23M | 0.03% |
+10,935
|
|
||
412
TG Therapeutics
TGTX
$6.25B
| $1.22M | 0.03% |
41,042
+24,508
|
|
||
413
Franco-Nevada
FNV
$45.6B
| $1.22M | 0.03% |
+5,886
|
|
||
414
Vanguard Real Estate ETF
VNQ
$36.8B
| $1.22M | 0.03% |
13,744
-40,742
|
|
||
|
P
415
Everpure Inc
P
$26.3B
| $1.22M | 0.03% |
+18,146
|
|
||
416
Flex
FLEX
$58.6B
| $1.21M | 0.03% |
20,054
-7,055
|
|
||
417
YieldMax Ultra Option Income Strategy ETF
ULTY
$856M
| $1.21M | 0.03% |
32,294
+5,571
|
|
||
418
Qiagen
QGEN
$7.78B
| $1.2M | 0.03% |
26,774
+17,356
|
|
||
419
Vanguard Information Technology ETF
VGT
$149B
| $1.2M | 0.03% |
+12,768
|
|
||
420
iShares MSCI EAFE ETF
EFA
$77.5B
| $1.2M | 0.03% |
+12,489
|
|
||
421
Euronet Worldwide
EEFT
$2.71B
| $1.19M | 0.03% |
15,685
+10,316
|
|
||
|
JBS
422
JBS N.V.
JBS
$13.1B
| $1.19M | 0.03% |
82,694
-60,286
|
|
||
423
Diageo
DEO
$43.9B
| $1.19M | 0.03% |
13,781
+11,316
|
|
||
424
Genesis Energy
GEL
$1.93B
| $1.18M | 0.03% |
75,419
+57,092
|
|
||
425
Sable Offshore Corp
SOC
$2.1B
| $1.17M | 0.03% |
129,451
+89,076
|
|