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 |
Invesco QQQ Trust
QQQ
|
+$41.7M |
| 2 |
Mastercard
MA
|
+$33.6M |
| 3 |
Alibaba
BABA
|
+$33.4M |
| 4 |
Apple
AAPL
|
+$27.9M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$26M |
Top Sells
| 1 |
JPMorgan Chase
JPM
|
+$60M |
| 2 |
TSMC
TSM
|
+$49.5M |
| 3 |
iShares Silver Trust
SLV
|
+$26M |
| 4 |
Amazon
AMZN
|
+$25.2M |
| 5 |
Boeing
BA
|
+$22.1M |
Sector Composition
| 1 | Consumer Discretionary | 23.12% |
| 2 | Technology | 13.05% |
| 3 | Healthcare | 11.53% |
| 4 | Industrials | 7.38% |
| 5 | Communication Services | 6.71% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MN
1876
DELISTED
MANNING & NAPIER, INC.
MN
| $14K | ﹤0.01% |
2,284
-2,098
| -48% | -$12.9K |
|
|
WORK
1877
DELISTED
Slack Technologies, Inc.
WORK
| $14K | ﹤0.01% |
350
-333,918
| -100% | -$13.4M |
|
1878
iShares MSCI BIC ETF
BKF
$94.4M
| $13K | ﹤0.01% |
+263
| New | +$13K |
|
1879
Brown & Brown
BRO
$30.4B
| $13K | ﹤0.01% |
+292
| New | +$13K |
|
1880
Celestica
CLS
$28.4B
| $13K | ﹤0.01% |
1,672
-1,434
| -46% | -$11.2K |
|
1881
First Trust US Equity Opportunities ETF
FPX
$1.1B
| $13K | ﹤0.01% |
+114
| New | +$13K |
|
1882
First Trust Health Care AlphaDEX Fund
FXH
$915M
| $13K | ﹤0.01% |
+124
| New | +$13K |
|
1883
Genpact
G
$7.36B
| $13K | ﹤0.01% |
333
-854
| -72% | -$33.3K |
|
1884
Heartland Express
HTLD
$657M
| $13K | ﹤0.01% |
+770
| New | +$13K |
|
|
JBGS
1885
JBG SMITH
JBGS
$1.45B
| $13K | ﹤0.01% |
436
-6,219
| -93% | -$185K |
|
1886
Pulse Biosciences
PLSE
$1.08B
| $13K | ﹤0.01% |
568
-305
| -35% | -$6.98K |
|
1887
SLR Investment Corp
SLRC
$872M
| $13K | ﹤0.01% |
768
+568
| +284% | +$9.62K |
|
1888
Telecom Argentina
TEO
$3.14B
| $13K | ﹤0.01% |
+2,046
| New | +$13K |
|
|
TMQ
1889
Trilogy Metals
TMQ
$360M
| $13K | ﹤0.01% |
6,953
+601
| +9% | +$1.12K |
|
1890
T-Mobile US
TMUS
$270B
| $13K | ﹤0.01% |
100
-1,574
| -94% | -$205K |
|
|
TRTX
1891
TPG RE Finance Trust
TRTX
$740M
| $13K | ﹤0.01% |
+1,287
| New | +$13K |
|
1892
ProShares Ultra 20+ Year Treasury
UBT
$107M
| $13K | ﹤0.01% |
212
+68
| +47% | +$4.17K |
|
1893
Q32 Bio
QTTB
$22.6M
| $13K | ﹤0.01% |
65
-563
| -90% | -$113K |
|
|
CMRX
1894
DELISTED
Chimerix, Inc.
CMRX
| $13K | ﹤0.01% |
+2,739
| New | +$13K |
|
|
GLOG
1895
DELISTED
GASLOG LTD
GLOG
| $13K | ﹤0.01% |
3,621
-22,250
| -86% | -$79.9K |
|
1896
Houlihan Lokey
HLI
$14.4B
| $12K | ﹤0.01% |
187
+13
| +7% | +$834 |
|
1897
AMC Entertainment Holdings
AMC
$1.48B
| $12K | ﹤0.01% |
+597
| New | +$12K |
|
1898
Astria Therapeutics
ATXS
$411M
| $12K | ﹤0.01% |
+984
| New | +$12K |
|
1899
Curtiss-Wright
CW
$19.6B
| $12K | ﹤0.01% |
107
-279
| -72% | -$31.3K |
|
1900
Gulf Island Fabrication
GIFI
$119M
| $12K | ﹤0.01% |
4,238
+1,014
| +31% | +$2.87K |
|