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 | |
|---|---|---|---|---|---|---|
751
3D Systems Corporation
DDD
$290M
| $87K | 0.01% |
+7,601
| New | +$87K |
|
752
Neogen
NEOG
$1.26B
| $87K | 0.01% |
+5,160
| New | +$87K |
|
753
Direxion Daily S&P 500 Bear 3x Shares
SPXS
$424M
| $87K | 0.01% |
+81
| New | +$87K |
|
|
BRSS
754
DELISTED
Global Brass & Copper Hldgs, Inc
BRSS
| $87K | 0.01% |
4,270
+3,716
| +671% | +$75.7K |
|
|
PGI
755
DELISTED
PREMIERE GLOBAL SERVICES, INC.
PGI
| $87K | 0.01% |
+6,341
| New | +$87K |
|
756
Ecolab
ECL
$77.3B
| $86K | 0.01% |
787
+720
| +1,075% | +$78.7K |
|
757
NiSource
NI
$19.3B
| $86K | 0.01% |
4,643
-10,482
| -69% | -$194K |
|
758
Kennametal
KMT
$1.61B
| $85K | 0.01% |
+3,416
| New | +$85K |
|
759
Matrix Service
MTRX
$364M
| $85K | 0.01% |
3,784
+3,684
| +3,684% | +$82.8K |
|
760
SouthState Bank Corporation
SSB
$10.3B
| $85K | 0.01% |
+1,108
| New | +$85K |
|
761
Boise Cascade
BCC
$3.29B
| $84K | 0.01% |
3,359
+1,474
| +78% | +$36.9K |
|
762
Dover
DOV
$24.5B
| $84K | 0.01% |
1,829
+1,606
| +720% | +$73.8K |
|
763
Kilroy Realty
KRC
$5.06B
| $84K | 0.01% |
+1,298
| New | +$84K |
|
764
Annaly Capital Management
NLY
$14.2B
| $84K | 0.01% |
2,133
-875
| -29% | -$34.5K |
|
|
GTT
765
DELISTED
GTT Communications, Inc.
GTT
| $84K | 0.01% |
+3,638
| New | +$84K |
|
|
BPT
766
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $83K | 0.01% |
2,029
-4,472
| -69% | -$183K |
|
767
Bassett Furniture
BSET
$144M
| $83K | 0.01% |
+2,989
| New | +$83K |
|
768
Darling Ingredients
DAR
$5.01B
| $83K | 0.01% |
7,434
-8,536
| -53% | -$95.3K |
|
769
M/I Homes
MHO
$4.08B
| $83K | 0.01% |
+3,532
| New | +$83K |
|
770
Stryker
SYK
$148B
| $83K | 0.01% |
886
-1,068
| -55% | -$100K |
|
771
VirnetX
VHC
$74.7M
| $83K | 0.01% |
+1,176
| New | +$83K |
|
|
SCMP
772
DELISTED
Sucampo Pharmaceuticals, Inc.
SCMP
| $83K | 0.01% |
4,195
+286
| +7% | +$5.66K |
|
773
DigitalBridge
DBRG
$2.18B
| $82K | 0.01% |
1,445
-764
| -35% | -$43.4K |
|
774
EnerSys
ENS
$3.99B
| $82K | 0.01% |
1,547
+1,500
| +3,191% | +$79.5K |
|
775
Jefferies Financial Group
JEF
$13.7B
| $82K | 0.01% |
4,527
-758
| -14% | -$13.7K |
|