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
|
+$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 4 |
Alibaba
BABA
|
+$9.66M |
| 5 |
Intel
INTC
|
+$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.8M |
| 2 |
Gilead Sciences
GILD
|
+$31.2M |
| 3 |
Booking.com
BKNG
|
+$29M |
| 4 |
Amazon
AMZN
|
+$25.6M |
| 5 |
Baidu
BIDU
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1226
Brunswick
BC
$4.26B
| $12K | ﹤0.01% |
+250
| New | +$12K |
|
1227
Cytokinetics
CYTK
$6.12B
| $12K | ﹤0.01% |
+1,888
| New | +$12K |
|
1228
GATX Corp
GATX
$6.05B
| $12K | ﹤0.01% |
+211
| New | +$12K |
|
1229
Grifois
GRFS
$6.72B
| $12K | ﹤0.01% |
762
-4,022
| -84% | -$63.3K |
|
1230
Healthcare Realty
HR
$6.45B
| $12K | ﹤0.01% |
+432
| New | +$12K |
|
1231
SPDR S&P Insurance ETF
KIE
$829M
| $12K | ﹤0.01% |
+546
| New | +$12K |
|
1232
Lennar Class A
LEN
$35.6B
| $12K | ﹤0.01% |
+250
| New | +$12K |
|
|
MOMO
1233
Hello Group
MOMO
$1.19B
| $12K | ﹤0.01% |
+1,169
| New | +$12K |
|
1234
MGIC Investment
MTG
$6.55B
| $12K | ﹤0.01% |
+1,336
| New | +$12K |
|
1235
Navient
NAVI
$1.28B
| $12K | ﹤0.01% |
+637
| New | +$12K |
|
1236
Nuwellis
NUWE
$3.77M
| – | – |
0
| – | – |
|
1237
Pricesmart
PSMT
$3.52B
| $12K | ﹤0.01% |
+146
| New | +$12K |
|
1238
Revvity
RVTY
$9.62B
| $12K | ﹤0.01% |
+250
| New | +$12K |
|
1239
Silgan Holdings
SLGN
$4.71B
| $12K | ﹤0.01% |
+444
| New | +$12K |
|
1240
Direxion Daily 20+ Year Treasury Bull 3X Shares
TMF
$5.54B
| $12K | ﹤0.01% |
+54
| New | +$12K |
|
1241
Thomson Reuters
TRI
$78B
| $12K | ﹤0.01% |
+270
| New | +$12K |
|
1242
Tile Shop Holdings
TTSH
$273M
| $12K | ﹤0.01% |
991
-11,933
| -92% | -$144K |
|
|
MDRX
1243
DELISTED
Veradigm Inc. Common Stock
MDRX
| $12K | ﹤0.01% |
1,038
+706
| +213% | +$8.16K |
|
|
CTXS
1244
DELISTED
Citrix Systems Inc
CTXS
| $12K | ﹤0.01% |
251
-5,838
| -96% | -$279K |
|
|
FWM
1245
DELISTED
FAIRWAY GROUP HLDGS CORP CL A COM STK (DE)
FWM
| $12K | ﹤0.01% |
1,863
+1,658
| +809% | +$10.7K |
|
|
ZGNX
1246
DELISTED
Zogenix, Inc.
ZGNX
| $12K | ﹤0.01% |
+1,125
| New | +$12K |
|
1247
Aecom
ACM
$16.8B
| $11K | ﹤0.01% |
386
+271
| +236% | +$7.72K |
|
1248
Cabot Corp
CBT
$4.2B
| $11K | ﹤0.01% |
247
+208
| +533% | +$9.26K |
|
1249
iShares MSCI United Kingdom ETF
EWU
$2.93B
| $11K | ﹤0.01% |
315
-117
| -27% | -$4.09K |
|
1250
Huntington Bancshares
HBAN
$25.9B
| $11K | ﹤0.01% |
1,067
+916
| +607% | +$9.44K |
|