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
|
+$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.8M |
| 4 |
Amazon
AMZN
|
+$38.6M |
| 5 |
Tesla
TSLA
|
+$36M |
Top Sells
| 1 |
Alibaba
BABA
|
+$46.4M |
| 2 |
Boeing
BA
|
+$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
NVIDIA
NVDA
|
+$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
951
Yext
YEXT
$1.04B
| $117K | ﹤0.01% |
8,120
+2,715
| +50% | +$39.1K |
|
|
LGF.B
952
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $117K | ﹤0.01% |
11,784
+9,636
| +449% | +$95.7K |
|
953
Globus Medical
GMED
$7.89B
| $116K | ﹤0.01% |
1,987
-707
| -26% | -$41.3K |
|
954
Oceaneering
OII
$2.45B
| $116K | ﹤0.01% |
7,796
+7,603
| +3,939% | +$113K |
|
|
CZZ
955
DELISTED
Cosan Limited
CZZ
| $116K | ﹤0.01% |
+5,086
| New | +$116K |
|
956
Geospace Technologies
GEOS
$211M
| $115K | ﹤0.01% |
+6,894
| New | +$115K |
|
957
Nike
NKE
$110B
| $115K | ﹤0.01% |
+1,144
| New | +$115K |
|
|
GLIBA
958
DELISTED
GCI Liberty, Inc. Class A Common Stock (DE)
GLIBA
| $115K | ﹤0.01% |
+1,629
| New | +$115K |
|
959
Kilroy Realty
KRC
$4.98B
| $114K | ﹤0.01% |
1,359
-1,511
| -53% | -$127K |
|
960
Vanguard Industrials ETF
VIS
$6.11B
| $114K | ﹤0.01% |
+747
| New | +$114K |
|
|
CIO
961
City Office REIT
CIO
$280M
| $113K | ﹤0.01% |
+8,421
| New | +$113K |
|
962
Direxion Daily Healthcare Bull 3X Shares
CURE
$165M
| $113K | ﹤0.01% |
+1,534
| New | +$113K |
|
963
Marsh & McLennan
MMC
$97.7B
| $113K | ﹤0.01% |
1,022
-2,729
| -73% | -$302K |
|
964
ProShares Ultra FTSE China 50 of PROSHARES TRUST
XPP
$19.4M
| $113K | ﹤0.01% |
1,681
+1,400
| +498% | +$94.1K |
|
|
TEN
965
Tsakos Energy Navigation Ltd.
TEN
$648M
| $113K | ﹤0.01% |
5,224
+2,068
| +66% | +$44.7K |
|
|
CETV
966
DELISTED
Central European Media Enterprises Ltd
CETV
| $113K | ﹤0.01% |
+25,000
| New | +$113K |
|
967
Clean Harbors
CLH
$12.6B
| $112K | ﹤0.01% |
+1,312
| New | +$112K |
|
968
Opko Health
OPK
$1.12B
| $112K | ﹤0.01% |
76,868
+48,519
| +171% | +$70.7K |
|
969
VanEck Retail ETF
RTH
$261M
| $112K | ﹤0.01% |
937
+926
| +8,418% | +$111K |
|
970
BGC Group
BGC
$4.75B
| $111K | ﹤0.01% |
18,826
-102,188
| -84% | -$603K |
|
971
Conduent
CNDT
$442M
| $111K | ﹤0.01% |
18,014
-75,753
| -81% | -$467K |
|
972
Medallion Financial
MFIN
$244M
| $111K | ﹤0.01% |
15,302
+7,515
| +97% | +$54.5K |
|
|
AUD
973
DELISTED
Audacy, Inc.
AUD
| $111K | ﹤0.01% |
24,033
+10,176
| +73% | +$47K |
|
|
GASL
974
DELISTED
Direxion Daily Natural Gas Related Bull 3X Shares
GASL
| $111K | ﹤0.01% |
113
+35
| +45% | +$34.4K |
|
975
Corbus Pharmaceuticals
CRBP
$118M
| $110K | ﹤0.01% |
+677
| New | +$110K |
|