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 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
ProShares Ultra Euro
ULE
$7.23M
| $294K | 0.02% |
+18,588
| New | +$294K |
|
|
FIT
427
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $293K | 0.02% |
23,984
-22,735
| -49% | -$278K |
|
|
AKS
428
DELISTED
AK Steel Holding Corp.
AKS
| $293K | 0.02% |
+62,981
| New | +$293K |
|
429
Pacira BioSciences
PCRX
$1.18B
| $291K | 0.02% |
8,656
+7,137
| +470% | +$240K |
|
430
Rockwell Medical
RMTI
$62M
| $289K | 0.02% |
3,476
-1,060
| -23% | -$88.1K |
|
|
CS
431
DELISTED
Credit Suisse Group
CS
| $287K | 0.02% |
26,848
+21,512
| +403% | +$230K |
|
|
HNP
432
DELISTED
Huaneng Power Intl, Inc.
HNP
| $286K | 0.02% |
11,477
+10,381
| +947% | +$259K |
|
|
MDCO
433
DELISTED
Medicines Co
MDCO
| $285K | 0.02% |
+8,492
| New | +$285K |
|
434
American Eagle Outfitters
AEO
$3.12B
| $284K | 0.02% |
+17,882
| New | +$284K |
|
|
ZEN
435
DELISTED
ZENDESK INC
ZEN
| $284K | 0.02% |
10,785
-21,203
| -66% | -$558K |
|
|
GRUB
436
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $283K | 0.02% |
4,564
-1,208
| -21% | -$74.9K |
|
437
Financial Select Sector SPDR Fund
XLF
$54.1B
| $282K | 0.02% |
+14,088
| New | +$282K |
|
438
Olin
OLN
$2.91B
| $279K | 0.02% |
11,249
-366
| -3% | -$9.08K |
|
|
CPGX
439
DELISTED
COLUMBIA PIPELINE GROUP IN COM STK (DE)
CPGX
| $279K | 0.02% |
10,968
-13,636
| -55% | -$347K |
|
440
ProShares Short Russell2000
RWM
$126M
| $278K | 0.02% |
4,723
+4,129
| +695% | +$243K |
|
441
Alaunos Therapeutics
TCRT
$5.07M
| $278K | 0.02% |
338
+236
| +231% | +$194K |
|
442
Outfront Media
OUT
$3.14B
| $277K | 0.02% |
11,663
+10,407
| +829% | +$247K |
|
443
Heron Therapeutics
HRTX
$199M
| $275K | 0.02% |
15,266
+3,310
| +28% | +$59.6K |
|
|
FMSA
444
DELISTED
Fairmount Santrol Holdings Inc.
FMSA
| $275K | 0.02% |
+35,689
| New | +$275K |
|
445
ICICI Bank
IBN
$114B
| $274K | 0.02% |
42,063
+41,001
| +3,861% | +$267K |
|
446
Hain Celestial
HAIN
$172M
| $272K | 0.02% |
5,476
+700
| +15% | +$34.8K |
|
447
Delek US
DK
$1.92B
| $271K | 0.02% |
20,532
+3,361
| +20% | +$44.4K |
|
448
iShares MSCI Canada ETF
EWC
$3.24B
| $270K | 0.02% |
+11,045
| New | +$270K |
|
|
AHGP
449
DELISTED
Alliance Holdings GP,L.P.
AHGP
| $268K | 0.02% |
+12,750
| New | +$268K |
|
|
TSL
450
DELISTED
Trina Solar Limited
TSL
| $267K | 0.02% |
+34,500
| New | +$267K |
|