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 |
Invesco QQQ Trust
QQQ
|
$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
$75.9M |
| 3 |
NVIDIA
NVDA
|
$42.6M |
| 4 |
Netflix
NFLX
|
$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$24.3M |
| 5 |
Broadcom
AVGO
|
$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
326
EPR Properties
EPR
$4.05B
| $819K | ﹤0.01% |
+24,731
| New | +$819K |
|
327
Mattel
MAT
$6.06B
| $815K | ﹤0.01% |
84,360
-74,843
| -47% | -$723K |
|
328
Celldex Therapeutics
CLDX
$1.52B
| $813K | ﹤0.01% |
+62,592
| New | +$813K |
|
329
Caesars Entertainment
CZR
$5.48B
| $810K | ﹤0.01% |
+20,239
| New | +$810K |
|
330
Huazhu Hotels Group
HTHT
$11.5B
| $805K | ﹤0.01% |
+22,989
| New | +$805K |
|
331
Sabre
SABR
$675M
| $801K | ﹤0.01% |
99,409
+11,036
| +12% | +$88.9K |
|
332
Corbus Pharmaceuticals
CRBP
$121M
| $794K | ﹤0.01% |
3,155
+2,959
| +1,510% | +$745K |
|
333
Barclays
BCS
$69.1B
| $791K | ﹤0.01% |
139,817
+68,711
| +97% | +$389K |
|
334
Dynavax Technologies
DVAX
$1.18B
| $785K | ﹤0.01% |
88,503
+17,860
| +25% | +$158K |
|
335
Cameco
CCJ
$33B
| $784K | ﹤0.01% |
76,499
-188,792
| -71% | -$1.93M |
|
336
iShares MSCI ACWI ETF
ACWI
$22.1B
| $783K | ﹤0.01% |
10,627
-159,443
| -94% | -$11.7M |
|
|
BBBY
337
Bed Bath & Beyond, Inc.
BBBY
$567M
| $781K | ﹤0.01% |
27,480
+26,930
| +4,896% | +$765K |
|
338
TD Synnex
SNX
$12.3B
| $779K | ﹤0.01% |
+13,020
| New | +$779K |
|
339
Haemonetics
HAE
$2.62B
| $778K | ﹤0.01% |
+8,688
| New | +$778K |
|
340
NovaGold Resources
NG
$2.75B
| $775K | ﹤0.01% |
84,462
+40,584
| +92% | +$372K |
|
341
Generac Holdings
GNRC
$10.6B
| $770K | ﹤0.01% |
6,320
+2,722
| +76% | +$332K |
|
342
MarineMax
HZO
$568M
| $767K | ﹤0.01% |
34,268
+26,672
| +351% | +$597K |
|
343
HSBC
HSBC
$227B
| $765K | ﹤0.01% |
32,816
-66,715
| -67% | -$1.56M |
|
344
ARK Web x.0 ETF
ARKW
$2.33B
| $760K | ﹤0.01% |
+8,967
| New | +$760K |
|
|
XLRN
345
DELISTED
Acceleron Pharma Inc.
XLRN
| $755K | ﹤0.01% |
7,931
+7,181
| +957% | +$684K |
|
|
FBC
346
DELISTED
Flagstar Bancorp, Inc. New
FBC
| $749K | ﹤0.01% |
25,462
+24,614
| +2,903% | +$724K |
|
347
Marriott Vacations Worldwide
VAC
$2.73B
| $746K | ﹤0.01% |
+9,084
| New | +$746K |
|
348
Tandem Diabetes Care
TNDM
$850M
| $745K | ﹤0.01% |
7,534
-12,091
| -62% | -$1.2M |
|
349
HF Sinclair
DINO
$9.56B
| $736K | ﹤0.01% |
25,214
+5,637
| +29% | +$165K |
|
350
MetLife
MET
$52.9B
| $731K | ﹤0.01% |
20,027
-25,858
| -56% | -$944K |
|