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 | |
|---|---|---|---|---|---|---|
301
Adeia
ADEA
$1.68B
| $675K | 0.03% |
85,696
+54,897
| +178% | +$432K |
|
302
Sarepta Therapeutics
SRPT
$1.84B
| $675K | 0.03% |
20,040
-27,441
| -58% | -$924K |
|
|
TGP
303
DELISTED
Teekay LNG Partners L.P.
TGP
| $666K | 0.03% |
43,428
+9,749
| +29% | +$150K |
|
|
QCP
304
DELISTED
Quality Care Properties, Inc.
QCP
| $657K | 0.03% |
+35,916
| New | +$657K |
|
305
Invesco CurrencyShares British Pound Sterling Trust
FXB
$91.2M
| $653K | 0.03% |
5,150
-1,050
| -17% | -$133K |
|
306
Under Armour
UAA
$2.19B
| $653K | 0.03% |
30,052
-95,948
| -76% | -$2.08M |
|
307
Casey's General Stores
CASY
$19.4B
| $651K | 0.03% |
+6,085
| New | +$651K |
|
308
Cboe Global Markets
CBOE
$24.5B
| $651K | 0.03% |
+7,125
| New | +$651K |
|
309
Hologic
HOLX
$14.8B
| $650K | 0.03% |
+14,345
| New | +$650K |
|
310
Skechers
SKX
$9.5B
| $646K | 0.03% |
21,921
-27,316
| -55% | -$805K |
|
311
Williams Companies
WMB
$69.4B
| $645K | 0.03% |
+21,329
| New | +$645K |
|
|
S
312
DELISTED
Sprint Corporation
S
| $642K | 0.03% |
78,258
+60,805
| +348% | +$499K |
|
313
Eagle Materials
EXP
$7.71B
| $636K | 0.03% |
6,891
+3,625
| +111% | +$335K |
|
314
SM Energy
SM
$3.07B
| $633K | 0.03% |
38,344
+4,887
| +15% | +$80.7K |
|
315
SPDR S&P Bank ETF
KBE
$1.62B
| $626K | 0.03% |
14,389
-3,643
| -20% | -$158K |
|
316
Jack in the Box
JACK
$375M
| $624K | 0.03% |
6,337
-13,181
| -68% | -$1.3M |
|
317
Cognex
CGNX
$7.49B
| $618K | 0.03% |
14,572
+8,170
| +128% | +$346K |
|
|
INST
318
DELISTED
Instructure, Inc.
INST
| $612K | 0.03% |
20,755
+17,842
| +612% | +$526K |
|
319
iShares US Financials ETF
IYF
$4.02B
| $609K | 0.03% |
+11,344
| New | +$609K |
|
320
Macerich
MAC
$4.68B
| $608K | 0.03% |
10,481
+10,131
| +2,895% | +$588K |
|
321
Air Lease Corp
AL
$7.12B
| $603K | 0.03% |
+16,141
| New | +$603K |
|
322
Masimo
MASI
$8.08B
| $598K | 0.03% |
6,559
+593
| +10% | +$54.1K |
|
323
Alcoa
AA
$8.3B
| $596K | 0.03% |
18,281
-87,332
| -83% | -$2.85M |
|
|
FINL
324
DELISTED
Finish Line
FINL
| $595K | 0.03% |
42,010
+39,877
| +1,870% | +$565K |
|
325
Philips
PHG
$26.5B
| $594K | 0.03% |
21,089
-84,486
| -80% | -$2.38M |
|