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 |
Alphabet (Google) Class C
GOOG
|
$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$40.9M |
| 4 |
Apple
AAPL
|
$16.5M |
| 5 |
Visa
V
|
$12M |
Top Sells
| 1 |
Amazon
AMZN
|
$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
$33.4M |
| 4 |
Goldman Sachs
GS
|
$30.2M |
| 5 |
Boeing
BA
|
$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
AERI
426
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $404K | ﹤0.01% |
11,209
-10,344
| -48% | -$373K |
|
427
Sealed Air
SEE
$4.82B
| $401K | ﹤0.01% |
+11,528
| New | +$401K |
|
428
BioMarin Pharmaceuticals
BMRN
$11.1B
| $397K | ﹤0.01% |
4,670
-4,553
| -49% | -$387K |
|
429
Travere Therapeutics
TVTX
$1.93B
| $397K | ﹤0.01% |
+17,548
| New | +$397K |
|
430
Lithia Motors
LAD
$8.74B
| $396K | ﹤0.01% |
5,188
+4,649
| +863% | +$355K |
|
431
Lexicon Pharmaceuticals
LXRX
$396M
| $389K | ﹤0.01% |
58,586
+45,657
| +353% | +$303K |
|
432
Bloomin' Brands
BLMN
$605M
| $388K | ﹤0.01% |
+21,710
| New | +$388K |
|
433
Immersion
IMMR
$230M
| $388K | ﹤0.01% |
43,407
+27,584
| +174% | +$247K |
|
|
AD
434
Array Digital Infrastructure, Inc.
AD
$4.54B
| $387K | ﹤0.01% |
7,449
+1,705
| +30% | +$88.6K |
|
435
Henry Schein
HSIC
$8.42B
| $386K | ﹤0.01% |
6,273
+5,198
| +484% | +$320K |
|
436
Pinduoduo
PDD
$177B
| $385K | ﹤0.01% |
17,201
-31,728
| -65% | -$710K |
|
437
BBVA Argentina
BBAR
$2.52B
| $382K | ﹤0.01% |
33,767
-3,901
| -10% | -$44.1K |
|
|
ZNGA
438
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $377K | ﹤0.01% |
95,947
+64,002
| +200% | +$251K |
|
439
GSK
GSK
$81.5B
| $375K | ﹤0.01% |
7,872
+7,712
| +4,820% | +$367K |
|
440
Vermilion Energy
VET
$1.12B
| $375K | ﹤0.01% |
17,835
+12,738
| +250% | +$268K |
|
441
BJ's Restaurants
BJRI
$742M
| $371K | ﹤0.01% |
+7,354
| New | +$371K |
|
442
iShares MSCI Canada ETF
EWC
$3.24B
| $369K | ﹤0.01% |
+15,409
| New | +$369K |
|
|
WW
443
DELISTED
WW International
WW
| $369K | ﹤0.01% |
9,590
+5,363
| +127% | +$206K |
|
|
BPT
444
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $368K | ﹤0.01% |
17,027
+13,918
| +448% | +$301K |
|
445
HUB Group
HUBG
$2.29B
| $368K | ﹤0.01% |
+19,880
| New | +$368K |
|
446
Boston Scientific
BSX
$159B
| $367K | ﹤0.01% |
+10,395
| New | +$367K |
|
447
Northern Trust
NTRS
$24.3B
| $367K | ﹤0.01% |
4,396
+330
| +8% | +$27.6K |
|
448
Tapestry
TPR
$21.7B
| $366K | ﹤0.01% |
10,865
+3,612
| +50% | +$122K |
|
449
Alkermes
ALKS
$4.94B
| $365K | ﹤0.01% |
+12,388
| New | +$365K |
|
|
SNP
450
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $365K | ﹤0.01% |
+5,177
| New | +$365K |
|