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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1576
Liberty Broadband Class C
LBRDK
$8.86B
| $68K | ﹤0.01% |
458
-329
| -42% | -$48.8K |
|
|
MTLS
1577
Materialise
MTLS
$305M
| $68K | ﹤0.01% |
1,907
-4,513
| -70% | -$161K |
|
1578
Strategic Education
STRA
$1.96B
| $68K | ﹤0.01% |
747
+622
| +498% | +$56.6K |
|
1579
Toll Brothers
TOL
$13.5B
| $68K | ﹤0.01% |
1,200
-40,666
| -97% | -$2.3M |
|
1580
Comtech Telecommunications
CMTL
$71.4M
| $67K | ﹤0.01% |
+2,699
| New | +$67K |
|
1581
Establishment Labs
ESTA
$1.13B
| $67K | ﹤0.01% |
+1,084
| New | +$67K |
|
1582
Huazhu Hotels Group
HTHT
$11.7B
| $67K | ﹤0.01% |
1,224
+95
| +8% | +$5.2K |
|
1583
ING
ING
$74.5B
| $67K | ﹤0.01% |
5,528
-71,379
| -93% | -$865K |
|
|
LADR
1584
Ladder Capital
LADR
$1.44B
| $67K | ﹤0.01% |
5,761
-32,100
| -85% | -$373K |
|
1585
SpartanNash
SPTN
$893M
| $67K | ﹤0.01% |
+3,423
| New | +$67K |
|
|
NSTG
1586
DELISTED
NanoString Technologies, Inc.
NSTG
| $67K | ﹤0.01% |
1,027
-2,484
| -71% | -$162K |
|
|
DBD
1587
DELISTED
Diebold Nixdorf Incorporated
DBD
| $67K | ﹤0.01% |
4,743
-55,956
| -92% | -$790K |
|
|
LJPC
1588
DELISTED
La Jolla Pharmaceutical Company
LJPC
| $67K | ﹤0.01% |
15,848
+3,626
| +30% | +$15.3K |
|
1589
Amtech Systems
ASYS
$125M
| $66K | ﹤0.01% |
+5,656
| New | +$66K |
|
1590
Pilgrim's Pride
PPC
$10.1B
| $66K | ﹤0.01% |
+2,796
| New | +$66K |
|
1591
Rithm Capital
RITM
$6.61B
| $66K | ﹤0.01% |
5,900
-21,881
| -79% | -$245K |
|
1592
Spire
SR
$4.49B
| $66K | ﹤0.01% |
+894
| New | +$66K |
|
1593
Synlogic
SYBX
$20M
| $66K | ﹤0.01% |
+1,242
| New | +$66K |
|
1594
Tidewater
TDW
$2.82B
| $66K | ﹤0.01% |
5,284
+5,057
| +2,228% | +$63.2K |
|
1595
Artisan Partners
APAM
$3.18B
| $65K | ﹤0.01% |
+1,264
| New | +$65K |
|
1596
China Yuchai International
CYD
$1.54B
| $65K | ﹤0.01% |
+4,259
| New | +$65K |
|
1597
Fossil Group
FOSL
$164M
| $65K | ﹤0.01% |
5,278
+2,030
| +63% | +$25K |
|
1598
Invitation Homes
INVH
$18.2B
| $65K | ﹤0.01% |
+2,051
| New | +$65K |
|
1599
Mustang Bio
MBIO
$11.7M
| $65K | ﹤0.01% |
26
-29
| -53% | -$72.5K |
|
|
SUBZ
1600
DELISTED
Roundhill Streaming Services & Technology ETF
SUBZ
| $65K | ﹤0.01% |
+5,053
| New | +$65K |
|