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 | |
|---|---|---|---|---|---|---|
|
CSOD
301
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $705K | 0.03% |
17,368
+4,073
| +31% | +$165K |
|
|
BEAT
302
DELISTED
BioTelemetry, Inc.
BEAT
| $703K | 0.03% |
+21,308
| New | +$703K |
|
303
Comerica
CMA
$8.85B
| $701K | 0.03% |
9,203
+4,887
| +113% | +$372K |
|
304
iShares US Transportation ETF
IYT
$605M
| $700K | 0.03% |
+15,704
| New | +$700K |
|
305
Franklin Covey
FC
$244M
| $696K | 0.03% |
34,323
+13,062
| +61% | +$265K |
|
|
TFCF
306
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $691K | 0.03% |
26,796
+22,386
| +508% | +$577K |
|
|
PTLA
307
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $685K | 0.03% |
12,686
+3,387
| +36% | +$183K |
|
|
RDS.A
308
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $684K | 0.03% |
11,294
-15,915
| -58% | -$964K |
|
309
Equinix
EQIX
$75.7B
| $683K | 0.03% |
1,531
+901
| +143% | +$402K |
|
310
PTC Therapeutics
PTCT
$4.55B
| $681K | 0.03% |
34,050
+6,883
| +25% | +$138K |
|
311
Weyerhaeuser
WY
$18.9B
| $680K | 0.03% |
+20,002
| New | +$680K |
|
|
AMTD
312
DELISTED
TD Ameritrade Holding Corp
AMTD
| $679K | 0.03% |
13,932
-38,515
| -73% | -$1.88M |
|
|
RDUS
313
DELISTED
Radius Recycling
RDUS
| $674K | 0.03% |
23,972
+5,958
| +33% | +$168K |
|
|
LUMO
314
DELISTED
Lumos Pharma, Inc. Common Stock
LUMO
| $674K | 0.03% |
+7,366
| New | +$674K |
|
315
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$11.4B
| $670K | 0.03% |
+87,195
| New | +$670K |
|
|
NXTM
316
DELISTED
NxStage Medical Inc.
NXTM
| $670K | 0.03% |
24,307
+15,793
| +185% | +$435K |
|
|
BZUN
317
Baozun
BZUN
$207M
| $669K | 0.03% |
20,445
+20,145
| +6,715% | +$659K |
|
318
Hormel Foods
HRL
$14.1B
| $669K | 0.03% |
20,841
-7,548
| -27% | -$242K |
|
319
GoDaddy
GDDY
$20.1B
| $663K | 0.03% |
15,254
+13,249
| +661% | +$576K |
|
320
InterDigital
IDCC
$7.43B
| $663K | 0.03% |
9,000
+7,903
| +720% | +$582K |
|
321
Okta
OKTA
$16.1B
| $661K | 0.03% |
23,462
+20,083
| +594% | +$566K |
|
322
TG Therapeutics
TGTX
$5.11B
| $655K | 0.03% |
55,301
+34,535
| +166% | +$409K |
|
323
Conduent
CNDT
$447M
| $654K | 0.03% |
41,778
-7,619
| -15% | -$119K |
|
324
Progressive
PGR
$143B
| $651K | 0.03% |
13,464
+8,821
| +190% | +$427K |
|
|
DFS
325
DELISTED
Discover Financial Services
DFS
| $650K | 0.03% |
10,092
+9,849
| +4,053% | +$634K |
|