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 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$16.3M |
| 3 |
Walt Disney
DIS
|
+$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.4M |
| 5 |
Gilead Sciences
GILD
|
+$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$95.3M |
| 2 |
Apple
AAPL
|
+$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
NVRO
276
DELISTED
NEVRO CORP.
NVRO
| $391K | 0.03% |
8,448
+6,544
| +344% | +$303K |
|
|
CLR
277
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $391K | 0.03% |
+13,523
| New | +$391K |
|
278
Prothena Corp
PRTA
$443M
| $390K | 0.03% |
8,607
+4,552
| +112% | +$206K |
|
279
ProShares Ultra FTSE China 50 of PROSHARES TRUST
XPP
$19.5M
| $390K | 0.03% |
+8,259
| New | +$390K |
|
280
Direxion Daily FTSE China Bull 3X Shares
YINN
$1.14B
| $390K | 0.03% |
1,107
-105
| -9% | -$37K |
|
|
MIK
281
DELISTED
Michaels Stores, Inc
MIK
| $387K | 0.03% |
+16,758
| New | +$387K |
|
|
VAL
282
DELISTED
Valspar
VAL
| $385K | 0.03% |
+5,366
| New | +$385K |
|
283
Invesco CurrencyShares Japanese Yen Trust
FXY
$562M
| $383K | 0.03% |
4,741
-459
| -9% | -$37.1K |
|
|
MRO
284
DELISTED
Marathon Oil Corporation
MRO
| $383K | 0.03% |
24,911
+16,445
| +194% | +$253K |
|
|
FIG
285
DELISTED
Fortress Investment Group Llc
FIG
| $381K | 0.03% |
68,781
-25,355
| -27% | -$140K |
|
|
MEG
286
DELISTED
Media General, Inc
MEG
| $381K | 0.03% |
+27,242
| New | +$381K |
|
287
ODP
ODP
$625M
| $378K | 0.03% |
5,903
+4,309
| +270% | +$276K |
|
288
CSX Corp
CSX
$60.3B
| $374K | 0.03% |
41,814
+13,260
| +46% | +$119K |
|
289
Marathon Petroleum
MPC
$55.9B
| $374K | 0.03% |
+8,075
| New | +$374K |
|
290
Nasdaq
NDAQ
$54.6B
| $373K | 0.03% |
21,027
-22,800
| -52% | -$404K |
|
291
Air Products & Chemicals
APD
$63.9B
| $371K | 0.03% |
3,150
+521
| +20% | +$61.4K |
|
292
Nokia
NOK
$24.6B
| $368K | 0.03% |
54,362
-451
| -0.8% | -$3.05K |
|
|
XOOM
293
DELISTED
XOOM CORP COM
XOOM
| $368K | 0.03% |
14,825
+9,320
| +169% | +$231K |
|
294
ATI
ATI
$10.4B
| $367K | 0.03% |
25,935
+22,142
| +584% | +$313K |
|
295
Hartford Financial Services
HIG
$36.9B
| $367K | 0.03% |
+8,037
| New | +$367K |
|
296
ProShares UltraShort Bloomberg Crude Oil
SCO
$124M
| $366K | 0.03% |
425
+375
| +750% | +$323K |
|
297
Lumen
LUMN
$5.73B
| $362K | 0.03% |
14,438
+11,393
| +374% | +$286K |
|
298
Boeing
BA
$174B
| $361K | 0.03% |
2,760
-26,667
| -91% | -$3.49M |
|
299
Estee Lauder
EL
$32.1B
| $359K | 0.03% |
4,462
+3,995
| +855% | +$321K |
|
300
Lexicon Pharmaceuticals
LXRX
$411M
| $358K | 0.03% |
+33,423
| New | +$358K |
|