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 | |
|---|---|---|---|---|---|---|
|
BWLD
376
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $500K | 0.02% |
3,951
+708
| +22% | +$89.6K |
|
377
PTC Therapeutics
PTCT
$4.64B
| $497K | 0.02% |
27,167
+17,975
| +196% | +$329K |
|
378
Bath & Body Works
BBWI
$5.82B
| $496K | 0.02% |
11,396
-109,640
| -91% | -$4.77M |
|
379
Seagate
STX
$40.7B
| $492K | 0.02% |
+12,697
| New | +$492K |
|
|
WRI
380
DELISTED
Weingarten Realty Investors
WRI
| $490K | 0.02% |
16,310
+6,543
| +67% | +$197K |
|
|
SGG
381
DELISTED
iPath Bloomberg Sugar Subindex Total Return ETN due June 24, 2038
SGG
| $490K | 0.02% |
16,902
+16,601
| +5,515% | +$481K |
|
|
MMP
382
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $489K | 0.02% |
6,862
+851
| +14% | +$60.6K |
|
|
ENDP
383
DELISTED
Endo International plc
ENDP
| $489K | 0.02% |
43,867
+17,599
| +67% | +$196K |
|
384
Qorvo
QRVO
$8.53B
| $487K | 0.02% |
+7,706
| New | +$487K |
|
385
Jefferies Financial Group
JEF
$13.3B
| $486K | 0.02% |
+20,795
| New | +$486K |
|
386
CF Industries
CF
$13.7B
| $484K | 0.02% |
17,343
+5,612
| +48% | +$157K |
|
387
Immersion
IMMR
$225M
| $484K | 0.02% |
53,352
-31,548
| -37% | -$286K |
|
388
Southern Company
SO
$100B
| $483K | 0.02% |
+10,089
| New | +$483K |
|
|
FNGN
389
DELISTED
Financial Engines, Inc.
FNGN
| $483K | 0.02% |
+13,198
| New | +$483K |
|
390
Sociedad Química y Minera de Chile
SQM
$11.8B
| $479K | 0.02% |
14,512
+10,237
| +239% | +$338K |
|
391
SBA Communications
SBAC
$20.6B
| $477K | 0.02% |
+3,539
| New | +$477K |
|
392
Pitney Bowes
PBI
$2.02B
| $475K | 0.02% |
31,495
-26,040
| -45% | -$393K |
|
|
CSOD
393
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $475K | 0.02% |
+13,295
| New | +$475K |
|
394
L3Harris
LHX
$50.6B
| $474K | 0.02% |
4,348
+1,293
| +42% | +$141K |
|
395
ScottsMiracle-Gro
SMG
$3.51B
| $474K | 0.02% |
5,305
-1,290
| -20% | -$115K |
|
396
Huntington Ingalls Industries
HII
$10.5B
| $473K | 0.02% |
2,541
-1,632
| -39% | -$304K |
|
397
Park Hotels & Resorts
PK
$2.34B
| $473K | 0.02% |
17,564
-7,107
| -29% | -$191K |
|
398
Kroger
KR
$44.7B
| $471K | 0.02% |
20,206
-18,219
| -47% | -$425K |
|
399
Cheniere Energy
LNG
$51.5B
| $471K | 0.02% |
+9,674
| New | +$471K |
|
400
Dillards
DDS
$8.87B
| $470K | 0.02% |
8,153
+7,351
| +917% | +$424K |
|