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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1251
Sweetgreen
SG
$1B
| $76K | ﹤0.01% |
4,151
-19,120
| -82% | -$350K |
|
|
UMH
1252
UMH Properties
UMH
$1.29B
| $76K | ﹤0.01% |
+4,714
| New | +$76K |
|
1253
Black Stone Minerals
BSM
$2.65B
| $75K | ﹤0.01% |
+4,815
| New | +$75K |
|
1254
CION Investment
CION
$517M
| $75K | ﹤0.01% |
8,907
+8,707
| +4,354% | +$73.3K |
|
1255
Quince Therapeutics
QNCX
$85.9M
| $75K | ﹤0.01% |
56,526
-1,491
| -3% | -$1.98K |
|
1256
SFL Corp
SFL
$1.06B
| $75K | ﹤0.01% |
8,262
+2,711
| +49% | +$24.6K |
|
1257
ProShares UltraShort Real Estate
SRS
$21.8M
| $75K | ﹤0.01% |
+912
| New | +$75K |
|
|
CIR
1258
DELISTED
CIRCOR International, Inc
CIR
| $75K | ﹤0.01% |
4,602
-1,677
| -27% | -$27.3K |
|
|
AVCT
1259
DELISTED
American Virtual Cloud Technologies, Inc. Common Stock
AVCT
| $75K | ﹤0.01% |
25,007
+22,144
| +773% | +$66.4K |
|
1260
InterDigital
IDCC
$8.33B
| $74K | ﹤0.01% |
+1,855
| New | +$74K |
|
1261
Adecoagro
AGRO
$806M
| $73K | ﹤0.01% |
8,908
+3,915
| +78% | +$32.1K |
|
1262
GoDaddy
GDDY
$20.1B
| $73K | ﹤0.01% |
+1,039
| New | +$73K |
|
1263
iShares 1-3 Year International Treasury Bond ETF
IGOV
$1.12B
| $73K | ﹤0.01% |
2,000
+1,800
| +900% | +$65.7K |
|
1264
LiveWire
LVWR
$986M
| $73K | ﹤0.01% |
+10,259
| New | +$73K |
|
1265
ManpowerGroup
MAN
$1.78B
| $73K | ﹤0.01% |
+1,130
| New | +$73K |
|
1266
Opendoor
OPEN
$6.68B
| $73K | ﹤0.01% |
23,567
-85,007
| -78% | -$263K |
|
1267
Transact Technologies
TACT
$45.9M
| $73K | ﹤0.01% |
20,013
+13,954
| +230% | +$50.9K |
|
1268
Zynex
ZYXI
$44.8M
| $73K | ﹤0.01% |
+8,114
| New | +$73K |
|
1269
Arcellx
ACLX
$4.23B
| $72K | ﹤0.01% |
+3,849
| New | +$72K |
|
1270
ProShares Ultra NASDAQ Biotechnology
BIB
$55.5M
| $72K | ﹤0.01% |
1,514
+1,100
| +266% | +$52.3K |
|
1271
Hyliion Holdings
HYLN
$284M
| $72K | ﹤0.01% |
25,361
-56,704
| -69% | -$161K |
|
1272
Pliant Therapeutics
PLRX
$97.6M
| $72K | ﹤0.01% |
3,461
-8,823
| -72% | -$184K |
|
1273
Pinnacle Financial Partners
PNFP
$7.55B
| $72K | ﹤0.01% |
+900
| New | +$72K |
|
1274
Southwest Gas
SWX
$5.65B
| $72K | ﹤0.01% |
1,045
-348
| -25% | -$24K |
|
1275
ProShares Trust Short MSCI EAFE
EFZ
$7.86M
| $71K | ﹤0.01% |
3,033
+2,931
| +2,874% | +$68.6K |
|