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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
751
Boston Beer
SAM
$2.43B
| $429K | ﹤0.01% |
356
+174
| +96% | +$210K |
|
752
American Water Works
AWK
$27.3B
| $426K | ﹤0.01% |
2,846
-10,466
| -79% | -$1.57M |
|
753
Medpace
MEDP
$13.6B
| $426K | ﹤0.01% |
2,601
+1,476
| +131% | +$242K |
|
|
XPOA
754
DELISTED
DPCM Capital, Inc.
XPOA
| $425K | ﹤0.01% |
+43,151
| New | +$425K |
|
|
GRA
755
DELISTED
W.R. Grace & Co.
GRA
| $424K | ﹤0.01% |
7,087
+1,356
| +24% | +$81.1K |
|
756
AgEagle Aerial Systems
UAVS
$65M
| $423K | ﹤0.01% |
+68
| New | +$423K |
|
757
Wayfair
W
$11.2B
| $423K | ﹤0.01% |
1,345
+712
| +112% | +$224K |
|
|
APTO
758
DELISTED
Aptose Biosciences, Inc.
APTO
| $423K | ﹤0.01% |
157
+114
| +265% | +$307K |
|
|
LORL
759
DELISTED
Loral Space and Communications, Inc.
LORL
| $423K | ﹤0.01% |
11,237
+2,754
| +32% | +$104K |
|
760
Greif
GEF
$3.5B
| $421K | ﹤0.01% |
7,399
+3,807
| +106% | +$217K |
|
761
Korro Bio
KRRO
$339M
| $419K | ﹤0.01% |
+884
| New | +$419K |
|
762
CarParts.com
PRTS
$52.1M
| $419K | ﹤0.01% |
29,365
-87,246
| -75% | -$1.24M |
|
|
PIPP
763
DELISTED
Pine Island Acquisition Corp.
PIPP
| $417K | ﹤0.01% |
+41,748
| New | +$417K |
|
|
SAFE
764
Safehold
SAFE
$1.17B
| $416K | ﹤0.01% |
4,816
+4,666
| +3,111% | +$403K |
|
765
SPDR S&P Oil & Gas Equipment & Services ETF
XES
$153M
| $416K | ﹤0.01% |
7,831
+6,381
| +440% | +$339K |
|
766
Clearwater Paper
CLW
$343M
| $413K | ﹤0.01% |
+10,987
| New | +$413K |
|
|
BCOV
767
DELISTED
Brightcove, Inc.
BCOV
| $412K | ﹤0.01% |
+20,483
| New | +$412K |
|
768
iShares MSCI USA Size Factor ETF
SIZE
$367M
| $411K | ﹤0.01% |
+3,424
| New | +$411K |
|
769
CACI
CACI
$10.5B
| $410K | ﹤0.01% |
1,666
+460
| +38% | +$113K |
|
770
New Oriental
EDU
$8.51B
| $410K | ﹤0.01% |
+2,932
| New | +$410K |
|
771
Lattice Semiconductor
LSCC
$9.05B
| $409K | ﹤0.01% |
9,096
-15,996
| -64% | -$719K |
|
|
ZIXI
772
DELISTED
Zix Corporation
ZIXI
| $407K | ﹤0.01% |
54,002
+39,799
| +280% | +$300K |
|
773
Fidelity National Financial
FNF
$16.3B
| $405K | ﹤0.01% |
+10,360
| New | +$405K |
|
774
Jacobs Solutions
J
$17.2B
| $405K | ﹤0.01% |
3,795
+3,669
| +2,912% | +$392K |
|
|
AQUA
775
DELISTED
Evoqua Water Technologies Corp. Common Stock
AQUA
| $405K | ﹤0.01% |
+15,410
| New | +$405K |
|