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 |
Amazon
AMZN
|
$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
$26.1M |
| 4 |
Booking.com
BKNG
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$42.8M |
| 2 |
Amgen
AMGN
|
$32.3M |
| 3 |
Baidu
BIDU
|
$21.9M |
| 4 |
Micron Technology
MU
|
$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
276
Century Communities
CCS
$2.07B
| $781K | 0.03% |
31,650
+8,127
| +35% | +$201K |
|
|
SFLY
277
DELISTED
Shutterfly, Inc.
SFLY
| $781K | 0.03% |
+16,116
| New | +$781K |
|
278
Duke Energy
DUK
$93.8B
| $780K | 0.03% |
+9,300
| New | +$780K |
|
279
Trane Technologies
TT
$92.1B
| $779K | 0.03% |
8,737
-697
| -7% | -$62.1K |
|
280
FTAI Aviation
FTAI
$15.8B
| $776K | 0.03% |
50,402
+271
| +0.5% | +$4.17K |
|
281
Under Armour
UAA
$2.2B
| $775K | 0.03% |
47,071
+17,019
| +57% | +$280K |
|
282
WisdomTree India Earnings Fund ETF
EPI
$2.89B
| $770K | 0.03% |
30,599
+12,705
| +71% | +$320K |
|
|
QEP
283
DELISTED
QEP RESOURCES, INC.
QEP
| $765K | 0.03% |
89,305
+66,017
| +283% | +$566K |
|
284
TAL Education Group
TAL
$6.17B
| $764K | 0.03% |
22,679
+10,709
| +89% | +$361K |
|
|
ADMS
285
DELISTED
Adamas Pharmaceuticals, Inc.
ADMS
| $762K | 0.03% |
+36,024
| New | +$762K |
|
286
3D Systems Corporation
DDD
$272M
| $761K | 0.03% |
+56,855
| New | +$761K |
|
287
Halliburton
HAL
$18.8B
| $761K | 0.03% |
16,548
-62,060
| -79% | -$2.85M |
|
288
iShares Expanded Tech Sector ETF
IGM
$8.79B
| $759K | 0.03% |
+29,346
| New | +$759K |
|
|
ABMD
289
DELISTED
Abiomed Inc
ABMD
| $756K | 0.03% |
4,487
+4,033
| +888% | +$680K |
|
290
Advance Auto Parts
AAP
$3.63B
| $750K | 0.03% |
+7,569
| New | +$750K |
|
291
Nektar Therapeutics
NKTR
$764M
| $743K | 0.03% |
2,064
+1,843
| +834% | +$663K |
|
292
Conagra Brands
CAG
$9.23B
| $739K | 0.03% |
+21,912
| New | +$739K |
|
|
ZAYO
293
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $731K | 0.03% |
21,240
+13,645
| +180% | +$470K |
|
294
Vanguard FTSE Emerging Markets ETF
VWO
$97.2B
| $730K | 0.03% |
16,761
+7,657
| +84% | +$333K |
|
|
TERP
295
DELISTED
TerraForm Power, Inc
TERP
| $723K | 0.03% |
54,732
-29,473
| -35% | -$389K |
|
296
Criteo
CRTO
$1.22B
| $721K | 0.03% |
17,391
+17,291
| +17,291% | +$717K |
|
|
BWLD
297
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $719K | 0.03% |
6,807
+2,856
| +72% | +$302K |
|
|
PNK
298
DELISTED
Pinnacle Entertainment Inc.
PNK
| $716K | 0.03% |
+33,606
| New | +$716K |
|
299
AngloGold Ashanti
AU
$30.2B
| $713K | 0.03% |
76,786
+46,977
| +158% | +$436K |
|
300
SPDR S&P Bank ETF
KBE
$1.62B
| $707K | 0.03% |
15,680
+1,291
| +9% | +$58.2K |
|