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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CAN
976
Canaan Creative
CAN
$384M
| $151K | ﹤0.01% |
149,773
-43,876
| -23% | -$44.2K |
|
977
Liberty Latin America Class C
LILAK
$1.55B
| $151K | ﹤0.01% |
15,934
+1,539
| +11% | +$14.6K |
|
978
California Resources
CRC
$4.39B
| $149K | ﹤0.01% |
2,841
-50,629
| -95% | -$2.66M |
|
979
Anywhere Real Estate
HOUS
$763M
| $149K | ﹤0.01% |
+29,402
| New | +$149K |
|
980
Chegg
CHGG
$173M
| $148K | ﹤0.01% |
84,175
+7,248
| +9% | +$12.7K |
|
981
Pure Storage
PSTG
$27B
| $148K | ﹤0.01% |
+2,955
| New | +$148K |
|
982
ProShares UltraShort Yen
YCS
$30.6M
| $148K | ﹤0.01% |
3,822
+3,146
| +465% | +$122K |
|
|
LGF.B
983
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $146K | ﹤0.01% |
21,203
+14,135
| +200% | +$97.3K |
|
984
Cincinnati Financial
CINF
$24.5B
| $145K | ﹤0.01% |
+1,068
| New | +$145K |
|
985
GrowGeneration
GRWG
$92.6M
| $145K | ﹤0.01% |
68,472
+29,441
| +75% | +$62.3K |
|
986
Alkermes
ALKS
$4.57B
| $144K | ﹤0.01% |
+5,173
| New | +$144K |
|
987
Aura Biosciences
AURA
$412M
| $144K | ﹤0.01% |
+16,258
| New | +$144K |
|
988
Relay Therapeutics
RLAY
$710M
| $144K | ﹤0.01% |
20,426
+18,017
| +748% | +$127K |
|
|
PLL
989
DELISTED
Piedmont Lithium
PLL
| $143K | ﹤0.01% |
16,099
+9,307
| +137% | +$82.7K |
|
|
TRTX
990
TPG RE Finance Trust
TRTX
$741M
| $143K | ﹤0.01% |
16,789
-517
| -3% | -$4.4K |
|
991
Etsy
ETSY
$5.91B
| $142K | ﹤0.01% |
2,561
-52,539
| -95% | -$2.91M |
|
992
Cedar Fair
FUN
$2.2B
| $142K | ﹤0.01% |
3,542
-3,009
| -46% | -$121K |
|
|
TWO
993
Two Harbors Investment
TWO
$1.05B
| $141K | ﹤0.01% |
10,173
-39,090
| -79% | -$542K |
|
994
Essex Property Trust
ESS
$17.3B
| $140K | ﹤0.01% |
476
+45
| +10% | +$13.2K |
|
995
TriplePoint Venture Growth BDC
TPVG
$271M
| $140K | ﹤0.01% |
19,850
-4,119
| -17% | -$29.1K |
|
996
Algonquin Power & Utilities
AQN
$4.31B
| $139K | ﹤0.01% |
+25,532
| New | +$139K |
|
|
MREO
997
Mereo BioPharma
MREO
$290M
| $139K | ﹤0.01% |
33,855
-7,538
| -18% | -$30.9K |
|
998
Lightwave Logic
LWLG
$397M
| $138K | ﹤0.01% |
50,160
-1,780
| -3% | -$4.9K |
|
999
TTEC Holdings
TTEC
$179M
| $138K | ﹤0.01% |
+23,645
| New | +$138K |
|
1000
Mersana Therapeutics
MRSN
$37.3M
| $137K | ﹤0.01% |
2,914
+1,368
| +88% | +$64.3K |
|