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 |
Apple
AAPL
|
+$35.2M |
| 2 |
Micron Technology
MU
|
+$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$29.5M |
| 4 |
NVIDIA
NVDA
|
+$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$33.4M |
| 3 |
Tesla
TSLA
|
+$19.8M |
| 4 |
Netflix
NFLX
|
+$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
+$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1251
Moody's
MCO
$90.8B
| $48K | ﹤0.01% |
287
-6,123
| -96% | -$1.02M |
|
1252
McEwen Inc.
MUX
$742M
| $48K | ﹤0.01% |
2,361
+1,685
| +249% | +$34.3K |
|
|
PDLI
1253
DELISTED
PDL BioPharma, Inc.
PDLI
| $48K | ﹤0.01% |
+20,607
| New | +$48K |
|
1254
B2Gold
BTG
$5.74B
| $47K | ﹤0.01% |
18,301
+3,007
| +20% | +$7.72K |
|
1255
iShares MSCI Singapore ETF
EWS
$816M
| $47K | ﹤0.01% |
+1,996
| New | +$47K |
|
1256
GoDaddy
GDDY
$20.1B
| $47K | ﹤0.01% |
667
+512
| +330% | +$36.1K |
|
1257
Global Partners
GLP
$1.77B
| $47K | ﹤0.01% |
+2,761
| New | +$47K |
|
1258
New Mountain Finance
NMFC
$1.11B
| $47K | ﹤0.01% |
3,462
-13,997
| -80% | -$190K |
|
1259
Pacira BioSciences
PCRX
$1.2B
| $47K | ﹤0.01% |
1,474
-21,739
| -94% | -$693K |
|
|
XONE
1260
DELISTED
The ExOne Company
XONE
| $47K | ﹤0.01% |
6,669
+3,581
| +116% | +$25.2K |
|
|
OILD
1261
DELISTED
ProShares UltraPro 3x Short Crude Oil ETF
OILD
| $47K | ﹤0.01% |
2,455
+2,190
| +826% | +$41.9K |
|
|
GMS
1262
DELISTED
GMS Inc
GMS
| $46K | ﹤0.01% |
+1,704
| New | +$46K |
|
|
JNPR
1263
DELISTED
Juniper Networks
JNPR
| $46K | ﹤0.01% |
1,704
-33,876
| -95% | -$914K |
|
1264
Plains GP Holdings
PAGP
$3.67B
| $46K | ﹤0.01% |
1,932
-906
| -32% | -$21.6K |
|
1265
iShares Mortgage Real Estate ETF
REM
$615M
| $46K | ﹤0.01% |
+1,081
| New | +$46K |
|
1266
Synchronoss Technologies
SNCR
$62.8M
| $46K | ﹤0.01% |
+841
| New | +$46K |
|
1267
WEX
WEX
$5.81B
| $46K | ﹤0.01% |
+242
| New | +$46K |
|
|
RADA
1268
DELISTED
Rada Electronic Industries Ltd
RADA
| $46K | ﹤0.01% |
15,144
+631
| +4% | +$1.92K |
|
|
OMED
1269
DELISTED
OncoMed Pharmaceuticals, Inc.
OMED
| $46K | ﹤0.01% |
20,302
+7,243
| +55% | +$16.4K |
|
1270
Cooper-Standard Automotive
CPS
$685M
| $45K | ﹤0.01% |
350
+244
| +230% | +$31.4K |
|
1271
Cousins Properties
CUZ
$4.91B
| $45K | ﹤0.01% |
1,161
+528
| +83% | +$20.5K |
|
1272
Ezcorp Inc
EZPW
$1.02B
| $45K | ﹤0.01% |
3,788
-6,913
| -65% | -$82.1K |
|
1273
ProShares UltraShort Gold
GLL
$50.6M
| $45K | ﹤0.01% |
300
+168
| +127% | +$25.2K |
|
|
HEES
1274
DELISTED
H&E Equipment Services
HEES
| $45K | ﹤0.01% |
+1,200
| New | +$45K |
|
|
TRVG
1275
trivago
TRVG
$230M
| $45K | ﹤0.01% |
2,016
-1,228
| -38% | -$27.4K |
|