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 | |
|---|---|---|---|---|---|---|
676
Metallus
MTUS
$695M
| $111K | 0.01% |
11,594
+10,955
| +1,714% | +$105K |
|
|
HTCH
677
DELISTED
HUTCHINSON TECHNOLOGY INC
HTCH
| $111K | 0.01% |
32,994
+31,236
| +1,777% | +$105K |
|
|
CEL
678
DELISTED
Cellcom Israel, Ltd.
CEL
| $110K | 0.01% |
+16,875
| New | +$110K |
|
679
Myriad Genetics
MYGN
$642M
| $109K | 0.01% |
+3,591
| New | +$109K |
|
|
AXLL
680
DELISTED
AXIALL CORP COM STK (DE)
AXLL
| $109K | 0.01% |
3,366
-33,971
| -91% | -$1.1M |
|
681
Lattice Semiconductor
LSCC
$9.06B
| $108K | 0.01% |
20,341
+15,881
| +356% | +$84.3K |
|
682
Mitek Systems
MITK
$454M
| $108K | 0.01% |
+15,327
| New | +$108K |
|
|
MXWL
683
DELISTED
Maxwell Technologies Inc
MXWL
| $108K | 0.01% |
20,518
+12,791
| +166% | +$67.3K |
|
684
Cadence Design Systems
CDNS
$92.2B
| $107K | 0.01% |
+4,417
| New | +$107K |
|
685
Invesco DB US Dollar Index Bearish Fund
UDN
$147M
| $107K | 0.01% |
4,896
-5,900
| -55% | -$129K |
|
686
Direxion Daily Healthcare Bull 3X Shares
CURE
$165M
| $106K | 0.01% |
3,363
+2,981
| +780% | +$94K |
|
687
PRA Group
PRAA
$653M
| $106K | 0.01% |
4,424
-2,302
| -34% | -$55.2K |
|
|
HIVE
688
DELISTED
AEROHIVE NETWORKS, INC.
HIVE
| $106K | 0.01% |
+16,026
| New | +$106K |
|
689
iShares MSCI Singapore ETF
EWS
$816M
| $105K | 0.01% |
4,875
+1,370
| +39% | +$29.5K |
|
690
TE Connectivity
TEL
$62.2B
| $105K | 0.01% |
1,839
-3,429
| -65% | -$196K |
|
691
Western Midstream Partners
WES
$14.6B
| $105K | 0.01% |
+2,764
| New | +$105K |
|
692
Bankunited
BKU
$2.9B
| $104K | 0.01% |
+3,405
| New | +$104K |
|
693
ProShares UltraShort MidCap400
MZZ
$1.16M
| $103K | 0.01% |
785
+553
| +238% | +$72.6K |
|
694
Tucows
TCX
$194M
| $103K | 0.01% |
4,269
+3,834
| +881% | +$92.5K |
|
695
G-III Apparel Group
GIII
$1.13B
| $101K | 0.01% |
+2,223
| New | +$101K |
|
696
National Grid
NGG
$70.1B
| $101K | 0.01% |
+1,393
| New | +$101K |
|
|
BPY
697
DELISTED
Brookfield Property Partners L.P. Limited Partnership Units
BPY
| $101K | 0.01% |
4,498
+272
| +6% | +$6.11K |
|
|
SPNC
698
DELISTED
Spectranetics Corp
SPNC
| $101K | 0.01% |
5,413
-3,220
| -37% | -$60.1K |
|
699
Alkermes
ALKS
$4.45B
| $100K | 0.01% |
2,321
-18,924
| -89% | -$815K |
|
|
GAU
700
Galiano Gold
GAU
$615M
| $100K | 0.01% |
+26,348
| New | +$100K |
|