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 |
Apple
AAPL
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
Aptiv
APTV
$17.5B
| $964K | ﹤0.01% |
+10,529
| New | +$964K |
|
302
Truist Financial
TFC
$60B
| $963K | ﹤0.01% |
+19,099
| New | +$963K |
|
303
PepsiCo
PEP
$200B
| $959K | ﹤0.01% |
8,815
+4,155
| +89% | +$452K |
|
304
Xerox
XRX
$493M
| $959K | ﹤0.01% |
39,994
+9,791
| +32% | +$235K |
|
305
Equifax
EFX
$30.8B
| $953K | ﹤0.01% |
+7,623
| New | +$953K |
|
306
PBF Energy
PBF
$3.3B
| $939K | ﹤0.01% |
22,413
+14,519
| +184% | +$608K |
|
307
Red Rock Resorts
RRR
$3.7B
| $931K | ﹤0.01% |
27,804
+10,524
| +61% | +$352K |
|
308
PACCAR
PCAR
$52B
| $928K | ﹤0.01% |
22,481
+179
| +0.8% | +$7.39K |
|
309
BlackLine
BL
$3.32B
| $926K | ﹤0.01% |
21,343
+11,031
| +107% | +$479K |
|
310
Wolfspeed
WOLF
$196M
| $921K | ﹤0.01% |
22,174
+13,407
| +153% | +$557K |
|
311
Post Holdings
POST
$5.88B
| $919K | ﹤0.01% |
16,327
+12,535
| +331% | +$706K |
|
|
XLRN
312
DELISTED
Acceleron Pharma Inc.
XLRN
| $914K | ﹤0.01% |
18,854
+17,356
| +1,159% | +$841K |
|
|
ZOES
313
DELISTED
Zoe's Kitchen, Inc.
ZOES
| $907K | ﹤0.01% |
+92,969
| New | +$907K |
|
314
Ferrari
RACE
$87.1B
| $900K | ﹤0.01% |
+6,668
| New | +$900K |
|
315
Danaher
DHR
$143B
| $895K | ﹤0.01% |
+10,237
| New | +$895K |
|
316
Conagra Brands
CAG
$9.23B
| $894K | ﹤0.01% |
+25,040
| New | +$894K |
|
317
iShares Select Dividend ETF
DVY
$20.8B
| $891K | ﹤0.01% |
+9,123
| New | +$891K |
|
318
Editas Medicine
EDIT
$248M
| $891K | ﹤0.01% |
24,882
-6,178
| -20% | -$221K |
|
319
Neurocrine Biosciences
NBIX
$14.3B
| $890K | ﹤0.01% |
9,069
+8,869
| +4,435% | +$870K |
|
320
ZTO Express
ZTO
$14.7B
| $890K | ﹤0.01% |
44,545
+34,225
| +332% | +$684K |
|
|
DNB
321
DELISTED
Dun & Bradstreet
DNB
| $888K | ﹤0.01% |
+7,244
| New | +$888K |
|
|
ACOR
322
DELISTED
Acorda Therapeutics, Inc.
ACOR
| $882K | ﹤0.01% |
256
+154
| +151% | +$531K |
|
323
ProShares Short VIX Short-Term Futures ETF
SVXY
$250M
| $866K | ﹤0.01% |
+34,059
| New | +$866K |
|
|
ZUO
324
DELISTED
Zuora, Inc.
ZUO
| $856K | ﹤0.01% |
+31,506
| New | +$856K |
|
325
Coca-Cola
KO
$292B
| $846K | ﹤0.01% |
19,293
+10,561
| +121% | +$463K |
|