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
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
851
Dorian LPG
LPG
$1.34B
| $205K | ﹤0.01% |
13,502
+13,334
| +7,937% | +$202K |
|
852
Sensus Healthcare
SRTS
$53.4M
| $205K | ﹤0.01% |
+26,760
| New | +$205K |
|
853
iShares Core MSCI EAFE ETF
IEFA
$153B
| $204K | ﹤0.01% |
3,479
+3,087
| +788% | +$181K |
|
854
Ambev
ABEV
$35.6B
| $202K | ﹤0.01% |
80,789
-27,703
| -26% | -$69.3K |
|
855
iShares US Financial Services ETF
IYG
$1.94B
| $202K | ﹤0.01% |
+4,092
| New | +$202K |
|
|
AMRS
856
DELISTED
Amyris Inc.
AMRS
| $200K | ﹤0.01% |
108,492
-75,918
| -41% | -$140K |
|
857
Alpha Pro Tech
APT
$51.2M
| $199K | ﹤0.01% |
44,692
-816
| -2% | -$3.63K |
|
858
CAE Inc
CAE
$8.55B
| $199K | ﹤0.01% |
8,096
-8,346
| -51% | -$205K |
|
859
OrthoPediatrics
KIDS
$509M
| $199K | ﹤0.01% |
4,628
+4,528
| +4,528% | +$195K |
|
|
USAK
860
DELISTED
USA Truck Inc
USAK
| $199K | ﹤0.01% |
+6,350
| New | +$199K |
|
861
Plains GP Holdings
PAGP
$3.69B
| $198K | ﹤0.01% |
19,210
+17,513
| +1,032% | +$181K |
|
862
Vanguard Total International Bond ETF
BNDX
$68.6B
| $197K | ﹤0.01% |
3,986
+3,886
| +3,886% | +$192K |
|
863
Nexstar Media Group
NXST
$6.24B
| $197K | ﹤0.01% |
1,211
+672
| +125% | +$109K |
|
864
TAL Education Group
TAL
$6.54B
| $196K | ﹤0.01% |
40,339
+24,066
| +148% | +$117K |
|
865
nCino
NCNO
$3.51B
| $195K | ﹤0.01% |
6,311
-40,023
| -86% | -$1.24M |
|
|
TEAD
866
Teads Holding Co. Common Stock
TEAD
$159M
| $195K | ﹤0.01% |
+38,790
| New | +$195K |
|
867
Corpay
CPAY
$22.1B
| $195K | ﹤0.01% |
+931
| New | +$195K |
|
868
Atomera
ATOM
$102M
| $194K | ﹤0.01% |
20,720
+19,851
| +2,284% | +$186K |
|
869
Hoya Capital Housing ETF
HOMZ
$37M
| $194K | ﹤0.01% |
+6,100
| New | +$194K |
|
870
iShares MSCI Chile ETF
ECH
$731M
| $193K | ﹤0.01% |
8,032
-1,620
| -17% | -$38.9K |
|
|
GOGL
871
DELISTED
Golden Ocean Group
GOGL
| $193K | ﹤0.01% |
16,637
-6,399
| -28% | -$74.2K |
|
872
Immersion
IMMR
$221M
| $193K | ﹤0.01% |
36,216
-28,647
| -44% | -$153K |
|
|
PRVB
873
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $193K | ﹤0.01% |
48,366
+24,629
| +104% | +$98.3K |
|
874
ProShares UltraShort Euro
EUO
$33.6M
| $192K | ﹤0.01% |
6,328
+3,016
| +91% | +$91.5K |
|
875
Quest Diagnostics
DGX
$20.6B
| $191K | ﹤0.01% |
1,437
-6,937
| -83% | -$922K |
|