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 |
Alibaba
BABA
|
$48.9M |
| 2 |
Boeing
BA
|
$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
FedEx
FDX
|
$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
$17.5M |
| 4 |
Netflix
NFLX
|
$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
251
SPDR S&P Metals & Mining ETF
XME
$2.35B
| $919K | ﹤0.01% |
36,143
-180,328
| -83% | -$4.59M |
|
252
Vornado Realty Trust
VNO
$7.93B
| $915K | ﹤0.01% |
14,382
+13,905
| +2,915% | +$885K |
|
253
Zebra Technologies
ZBRA
$16B
| $914K | ﹤0.01% |
4,431
-2,300
| -34% | -$474K |
|
254
Tapestry
TPR
$21.7B
| $910K | ﹤0.01% |
34,944
+15,171
| +77% | +$395K |
|
255
Pan American Silver
PAAS
$14.6B
| $906K | ﹤0.01% |
57,781
+49,642
| +610% | +$778K |
|
256
Arrowhead Research
ARWR
$4.02B
| $903K | ﹤0.01% |
32,069
-14,909
| -32% | -$420K |
|
257
QuidelOrtho
QDEL
$1.95B
| $898K | ﹤0.01% |
14,651
+12,123
| +480% | +$743K |
|
258
Teledyne Technologies
TDY
$25.7B
| $898K | ﹤0.01% |
2,792
+2,666
| +2,116% | +$857K |
|
259
ProShares UltraPro Dow 30
UDOW
$715M
| $898K | ﹤0.01% |
17,096
-9,108
| -35% | -$478K |
|
260
Global X Silver Miners ETF NEW
SIL
$2.92B
| $895K | ﹤0.01% |
31,861
+23,460
| +279% | +$659K |
|
261
Banco Santander
SAN
$141B
| $893K | ﹤0.01% |
231,939
+16,227
| +8% | +$62.5K |
|
262
Nektar Therapeutics
NKTR
$764M
| $888K | ﹤0.01% |
3,250
+2,625
| +420% | +$717K |
|
|
WWE
263
DELISTED
World Wrestling Entertainment
WWE
| $883K | ﹤0.01% |
12,415
-1,275
| -9% | -$90.7K |
|
264
ANI Pharmaceuticals
ANIP
$2.07B
| $882K | ﹤0.01% |
12,115
+10,251
| +550% | +$746K |
|
265
Agios Pharmaceuticals
AGIO
$2.09B
| $875K | ﹤0.01% |
+27,037
| New | +$875K |
|
266
Knowles
KN
$1.85B
| $870K | ﹤0.01% |
42,780
+21,305
| +99% | +$433K |
|
267
Magnachip Semiconductor
MX
$107M
| $868K | ﹤0.01% |
85,676
+84,242
| +5,875% | +$853K |
|
268
Tesla
TSLA
$1.13T
| $867K | ﹤0.01% |
54,045
+27,555
| +104% | +$442K |
|
269
BlackBerry
BB
$2.31B
| $864K | ﹤0.01% |
164,747
+22,960
| +16% | +$120K |
|
270
Hologic
HOLX
$14.8B
| $864K | ﹤0.01% |
17,126
+16,137
| +1,632% | +$814K |
|
271
Rockwell Automation
ROK
$38.2B
| $863K | ﹤0.01% |
+5,241
| New | +$863K |
|
272
National Healthcare
NHC
$1.78B
| $856K | ﹤0.01% |
+10,463
| New | +$856K |
|
273
National Grid
NGG
$69.6B
| $851K | ﹤0.01% |
+17,539
| New | +$851K |
|
274
iShares MSCI India ETF
INDA
$9.26B
| $846K | ﹤0.01% |
25,217
+24,278
| +2,586% | +$814K |
|
275
Goldman Sachs
GS
$223B
| $838K | ﹤0.01% |
+4,045
| New | +$838K |
|