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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
551
Hanesbrands
HBI
$2.23B
| $304K | ﹤0.01% |
+17,680
| New | +$304K |
|
552
iShares Gold Trust
IAU
$53.3B
| $304K | ﹤0.01% |
+11,268
| New | +$304K |
|
|
VRN
553
DELISTED
Veren
VRN
| $304K | ﹤0.01% |
92,163
+80,763
| +708% | +$266K |
|
|
MGLN
554
DELISTED
Magellan Health Services, Inc.
MGLN
| $304K | ﹤0.01% |
+4,097
| New | +$304K |
|
555
Brown-Forman Class B
BF.B
$13B
| $300K | ﹤0.01% |
5,428
+132
| +2% | +$7.3K |
|
556
Pembina Pipeline
PBA
$22.4B
| $299K | ﹤0.01% |
+8,047
| New | +$299K |
|
557
Stellantis
STLA
$27.3B
| $299K | ﹤0.01% |
21,701
+17,908
| +472% | +$247K |
|
558
Alaunos Therapeutics
TCRT
$5.05M
| $296K | ﹤0.01% |
339
+67
| +25% | +$58.5K |
|
|
LJPC
559
DELISTED
La Jolla Pharmaceutical Company
LJPC
| $296K | ﹤0.01% |
32,016
+30,693
| +2,320% | +$284K |
|
|
MAXR
560
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $295K | ﹤0.01% |
+37,757
| New | +$295K |
|
|
ATRS
561
DELISTED
Antares Pharma, Inc.
ATRS
| $295K | ﹤0.01% |
89,666
+48,416
| +117% | +$159K |
|
562
Vanguard Total Bond Market
BND
$135B
| $292K | ﹤0.01% |
+3,527
| New | +$292K |
|
563
POSCO
PKX
$15.5B
| $291K | ﹤0.01% |
5,486
+4,382
| +397% | +$232K |
|
564
Karyopharm Therapeutics
KPTI
$55.3M
| $288K | ﹤0.01% |
3,207
+2,408
| +301% | +$216K |
|
565
West Pharmaceutical
WST
$18.7B
| $288K | ﹤0.01% |
2,303
-2,432
| -51% | -$304K |
|
566
Fastly
FSLY
$1.13B
| $286K | ﹤0.01% |
+14,147
| New | +$286K |
|
567
Itaú Unibanco
ITUB
$77.1B
| $283K | ﹤0.01% |
40,136
-130,321
| -76% | -$919K |
|
|
MIC
568
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $283K | ﹤0.01% |
6,988
-11,360
| -62% | -$460K |
|
|
MRNS
569
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $281K | ﹤0.01% |
16,956
-46,594
| -73% | -$772K |
|
|
DPLO
570
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $281K | ﹤0.01% |
46,233
+19,893
| +76% | +$121K |
|
571
iShares National Muni Bond ETF
MUB
$39.5B
| $280K | ﹤0.01% |
2,476
-281
| -10% | -$31.8K |
|
|
BFYT
572
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $280K | ﹤0.01% |
+10,819
| New | +$280K |
|
573
Transocean
RIG
$3.06B
| $279K | ﹤0.01% |
43,620
-94,662
| -68% | -$605K |
|
574
iShares Core S&P Small-Cap ETF
IJR
$86.4B
| $278K | ﹤0.01% |
+3,556
| New | +$278K |
|
|
HDS
575
DELISTED
HD Supply Holdings, Inc.
HDS
| $278K | ﹤0.01% |
6,903
-1,597
| -19% | -$64.3K |
|