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
|
$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
$37M |
| 3 |
Amgen
AMGN
|
$32.3M |
| 4 |
Micron Technology
MU
|
$29.4M |
| 5 |
Qualcomm
QCOM
|
$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$29.8M |
| 2 |
Gilead Sciences
GILD
|
$29.3M |
| 3 |
Goldman Sachs
GS
|
$27.7M |
| 4 |
Booking.com
BKNG
|
$26M |
| 5 |
AT&T
T
|
$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MDRX
276
DELISTED
Veradigm Inc. Common Stock
MDRX
| $758K | 0.03% |
+59,476
| New | +$758K |
|
277
Exelixis
EXEL
$10.2B
| $757K | 0.03% |
+30,738
| New | +$757K |
|
278
Marvell Technology
MRVL
$54.6B
| $755K | 0.03% |
+45,714
| New | +$755K |
|
|
SIOX
279
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $749K | 0.03% |
4,038
-405
| -9% | -$75.1K |
|
|
WUBA
280
DELISTED
58.COM INC
WUBA
| $742K | 0.03% |
+16,829
| New | +$742K |
|
281
Caesars Entertainment
CZR
$5.48B
| $741K | 0.03% |
+37,059
| New | +$741K |
|
282
Pultegroup
PHM
$27.7B
| $741K | 0.03% |
+30,238
| New | +$741K |
|
283
Eversource Energy
ES
$23.6B
| $738K | 0.03% |
12,171
-3,132
| -20% | -$190K |
|
|
SAGE
284
DELISTED
Sage Therapeutics
SAGE
| $737K | 0.03% |
9,258
+7,812
| +540% | +$622K |
|
285
Energizer
ENR
$1.96B
| $736K | 0.03% |
15,327
+3,187
| +26% | +$153K |
|
286
ICICI Bank
IBN
$113B
| $733K | 0.03% |
81,728
+9,863
| +14% | +$88.5K |
|
287
ASML
ASML
$307B
| $732K | 0.03% |
5,619
-16,291
| -74% | -$2.12M |
|
288
Editas Medicine
EDIT
$248M
| $720K | 0.03% |
42,930
+32,108
| +297% | +$538K |
|
|
ABCO
289
DELISTED
Advisory Board Co/The
ABCO
| $720K | 0.03% |
13,989
+9,443
| +208% | +$486K |
|
290
Hartford Financial Services
HIG
$37B
| $718K | 0.03% |
13,661
-14,511
| -52% | -$763K |
|
291
Churchill Downs
CHDN
$7.18B
| $716K | 0.03% |
23,448
+14,076
| +150% | +$430K |
|
|
NEX
292
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $709K | 0.03% |
+44,331
| New | +$709K |
|
|
JO
293
DELISTED
iPath Bloomberg Coffee Subindex Total Return ETN due June 24, 2038
JO
| $704K | 0.03% |
42,118
+337
| +0.8% | +$5.63K |
|
|
SPNC
294
DELISTED
Spectranetics Corp
SPNC
| $704K | 0.03% |
18,346
+3,729
| +26% | +$143K |
|
295
Cleveland-Cliffs
CLF
$5.63B
| $696K | 0.03% |
100,721
-29,779
| -23% | -$206K |
|
296
BBVA Argentina
BBAR
$2.52B
| $695K | 0.03% |
36,750
+26,131
| +246% | +$494K |
|
|
QIWI
297
DELISTED
QIWI PLC
QIWI
| $695K | 0.03% |
28,197
+20,517
| +267% | +$506K |
|
298
CRA International
CRAI
$1.28B
| $683K | 0.03% |
18,827
+2,152
| +13% | +$78.1K |
|
299
FTAI Aviation
FTAI
$15.8B
| $682K | 0.03% |
50,131
+49,567
| +8,788% | +$674K |
|
300
Golar LNG
GLNG
$4.52B
| $676K | 0.03% |
30,421
+17,555
| +136% | +$390K |
|