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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ENDP
576
DELISTED
Endo International plc
ENDP
| $248K | ﹤0.01% |
77,491
+76,561
| +8,232% | +$245K |
|
|
CCLP
577
DELISTED
CSI Compressco LP
CCLP
| $246K | ﹤0.01% |
83,165
-3,300
| -4% | -$9.76K |
|
578
Boston Properties
BXP
$11.7B
| $244K | ﹤0.01% |
+1,888
| New | +$244K |
|
579
Magnolia Oil & Gas
MGY
$4.5B
| $243K | ﹤0.01% |
21,968
+19,169
| +685% | +$212K |
|
|
CTXS
580
DELISTED
Citrix Systems Inc
CTXS
| $241K | ﹤0.01% |
2,500
-53,746
| -96% | -$5.18M |
|
|
HEP
581
DELISTED
Holly Energy Partners, L.P.
HEP
| $240K | ﹤0.01% |
9,508
-1,990
| -17% | -$50.2K |
|
582
Manhattan Associates
MANH
$12.8B
| $239K | ﹤0.01% |
+2,966
| New | +$239K |
|
583
WPP
WPP
$5.8B
| $239K | ﹤0.01% |
3,820
-1,672
| -30% | -$105K |
|
584
MPLX
MPLX
$50.8B
| $238K | ﹤0.01% |
8,523
+6,676
| +361% | +$186K |
|
585
Ultra Clean Holdings
UCTT
$1.12B
| $237K | ﹤0.01% |
16,217
-3,173
| -16% | -$46.4K |
|
|
VNET
586
VNET Group
VNET
$2.13B
| $236K | ﹤0.01% |
+31,052
| New | +$236K |
|
587
Church & Dwight Co
CHD
$22.7B
| $235K | ﹤0.01% |
3,125
-1,680
| -35% | -$126K |
|
588
ProPetro Holding
PUMP
$505M
| $235K | ﹤0.01% |
+25,874
| New | +$235K |
|
589
Invesco S&P 500 Low Volatility ETF
SPLV
$7.83B
| $235K | ﹤0.01% |
4,067
-20,213
| -83% | -$1.17M |
|
|
UFS
590
DELISTED
DOMTAR CORPORATION (New)
UFS
| $232K | ﹤0.01% |
+6,503
| New | +$232K |
|
591
Carpenter Technology
CRS
$12.3B
| $231K | ﹤0.01% |
4,479
+3,758
| +521% | +$194K |
|
592
iShares MSCI South Africa ETF
EZA
$436M
| $230K | ﹤0.01% |
4,856
+1,703
| +54% | +$80.7K |
|
593
Sprouts Farmers Market
SFM
$13.1B
| $230K | ﹤0.01% |
11,901
-18,274
| -61% | -$353K |
|
|
AERI
594
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $230K | ﹤0.01% |
12,009
-14,604
| -55% | -$280K |
|
|
ALDR
595
DELISTED
Alder Biopharmaceuticals, Inc.
ALDR
| $230K | ﹤0.01% |
12,198
+7,889
| +183% | +$149K |
|
|
BEAT
596
DELISTED
BioTelemetry, Inc.
BEAT
| $230K | ﹤0.01% |
5,654
-3,012
| -35% | -$123K |
|
597
Norwegian Cruise Line
NCLH
$11.5B
| $229K | ﹤0.01% |
+4,430
| New | +$229K |
|
598
Chemours
CC
$2.44B
| $226K | ﹤0.01% |
15,193
-4,704
| -24% | -$70K |
|
|
NETI
599
DELISTED
Eneti Inc.
NETI
| $226K | ﹤0.01% |
4,009
+3,012
| +302% | +$170K |
|
600
Kilroy Realty
KRC
$4.98B
| $223K | ﹤0.01% |
+2,870
| New | +$223K |
|