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
|
$186M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$86.2M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$56.8M |
| 4 |
iShares Silver Trust
SLV
|
$42.9M |
| 5 |
Advanced Micro Devices
AMD
|
$36.5M |
Top Sells
| 1 |
Occidental Petroleum
OXY
|
$44.4M |
| 2 |
Financial Select Sector SPDR Fund
XLF
|
$42.8M |
| 3 |
Verizon
VZ
|
$40.8M |
| 4 |
Direxion Daily S&P 500 Bull 3x Shares
SPXL
|
$33.6M |
| 5 |
iShares China Large-Cap ETF
FXI
|
$33M |
Sector Composition
| 1 | Technology | 23.31% |
| 2 | Consumer Discretionary | 13.02% |
| 3 | Industrials | 8.24% |
| 4 | Healthcare | 7.47% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Rocket Lab Corporation Common Stock
RKLB
$22.1B
| $1.24M | ﹤0.01% |
153,557
-158,049
| -51% | -$1.27M |
|
427
SPDR S&P Homebuilders ETF
XHB
$2.01B
| $1.24M | ﹤0.01% |
+19,562
| New | +$1.24M |
|
|
SWN
428
DELISTED
Southwestern Energy Company
SWN
| $1.24M | ﹤0.01% |
172,358
-21,135
| -11% | -$151K |
|
|
CPE
429
DELISTED
Callon Petroleum Company
CPE
| $1.23M | ﹤0.01% |
20,887
-25,082
| -55% | -$1.48M |
|
430
Caesars Entertainment
CZR
$5.48B
| $1.23M | ﹤0.01% |
15,917
-212,984
| -93% | -$16.5M |
|
431
Guardant Health
GH
$7.5B
| $1.23M | ﹤0.01% |
18,593
+16,072
| +638% | +$1.06M |
|
432
United States Brent Oil Fund
BNO
$108M
| $1.22M | ﹤0.01% |
40,806
+12,766
| +46% | +$382K |
|
|
ACC
433
DELISTED
American Campus Communities, Inc.
ACC
| $1.22M | ﹤0.01% |
21,807
+17,913
| +460% | +$1M |
|
434
Spotify
SPOT
$146B
| $1.22M | ﹤0.01% |
8,076
-9,455
| -54% | -$1.43M |
|
|
DISCA
435
DELISTED
Discovery, Inc. Series A Common Stock
DISCA
| $1.22M | ﹤0.01% |
48,880
-71,196
| -59% | -$1.77M |
|
436
BlackBerry
BB
$2.31B
| $1.22M | ﹤0.01% |
163,013
+102,285
| +168% | +$763K |
|
437
Moody's
MCO
$89.5B
| $1.22M | ﹤0.01% |
3,604
+2,869
| +390% | +$968K |
|
438
Bumble
BMBL
$697M
| $1.22M | ﹤0.01% |
41,952
+33,640
| +405% | +$974K |
|
439
FTAI Aviation
FTAI
$15.8B
| $1.21M | ﹤0.01% |
+54,894
| New | +$1.21M |
|
440
Aspen Aerogels
ASPN
$544M
| $1.21M | ﹤0.01% |
+34,998
| New | +$1.21M |
|
441
Global X Copper Miners ETF NEW
COPX
$2.13B
| $1.2M | ﹤0.01% |
26,324
-13,806
| -34% | -$628K |
|
442
Nova
NVMI
$7.58B
| $1.2M | ﹤0.01% |
10,979
-3,488
| -24% | -$380K |
|
443
Cloudflare
NET
$74.7B
| $1.19M | ﹤0.01% |
+9,952
| New | +$1.19M |
|
444
Boston Scientific
BSX
$159B
| $1.19M | ﹤0.01% |
26,821
+798
| +3% | +$35.3K |
|
|
BKI
445
DELISTED
Black Knight, Inc. Common Stock
BKI
| $1.18M | ﹤0.01% |
20,338
+8,130
| +67% | +$471K |
|
|
AVLR
446
DELISTED
Avalara, Inc.
AVLR
| $1.18M | ﹤0.01% |
11,848
+4,619
| +64% | +$459K |
|
|
IAA
447
DELISTED
IAA, Inc. Common Stock
IAA
| $1.17M | ﹤0.01% |
30,604
-8,536
| -22% | -$326K |
|
448
ATI
ATI
$10.7B
| $1.16M | ﹤0.01% |
+43,167
| New | +$1.16M |
|
|
ELME
449
Elme Communities
ELME
$1.52B
| $1.16M | ﹤0.01% |
+45,385
| New | +$1.16M |
|
|
NVEI
450
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $1.16M | ﹤0.01% |
15,345
+11,098
| +261% | +$836K |
|