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 |
Alphabet (Google) Class C
GOOG
|
+$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 4 |
Alibaba
BABA
|
+$9.66M |
| 5 |
Intel
INTC
|
+$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.8M |
| 2 |
Gilead Sciences
GILD
|
+$31.2M |
| 3 |
Booking.com
BKNG
|
+$29M |
| 4 |
Amazon
AMZN
|
+$25.6M |
| 5 |
Baidu
BIDU
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
STRP
651
DELISTED
Straight Path Communications Inc.
STRP
| $90K | 0.01% |
+4,544
| New | +$90K |
|
|
PPO
652
DELISTED
POLYPORE INTERNATIONAL, INC
PPO
| $90K | 0.01% |
1,539
+1,469
| +2,099% | +$85.9K |
|
653
Protolabs
PRLB
$1.17B
| $89K | 0.01% |
+1,274
| New | +$89K |
|
654
Credicorp
BAP
$21B
| $88K | 0.01% |
627
+430
| +218% | +$60.4K |
|
|
FLG
655
Flagstar Financial, Inc.
FLG
$5.24B
| $88K | 0.01% |
1,757
-265
| -13% | -$13.3K |
|
656
InterDigital
IDCC
$7.7B
| $87K | 0.01% |
+1,723
| New | +$87K |
|
|
P
657
DELISTED
Pandora Media Inc
P
| $87K | 0.01% |
5,412
-19,089
| -78% | -$307K |
|
658
BHP
BHP
$135B
| $86K | 0.01% |
+2,189
| New | +$86K |
|
|
INXN
659
DELISTED
Interxion Holding N.V.
INXN
| $86K | 0.01% |
3,056
+2,299
| +304% | +$64.7K |
|
660
Vanguard Small-Cap ETF
VB
$66.7B
| $85K | 0.01% |
+700
| New | +$85K |
|
661
CorMedix
CRMD
$955M
| $84K | 0.01% |
+1,707
| New | +$84K |
|
|
B
662
Barrick Mining Corporation
B
$50.3B
| $84K | 0.01% |
7,712
-17,541
| -69% | -$191K |
|
663
Littelfuse
LFUS
$6.54B
| $84K | 0.01% |
+853
| New | +$84K |
|
664
ProShares UltraShort Yen
YCS
$30.7M
| $84K | 0.01% |
+3,792
| New | +$84K |
|
|
SRNE
665
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $84K | 0.01% |
+7,335
| New | +$84K |
|
666
Chord Energy
CHRD
$6.1B
| $83K | 0.01% |
+5,856
| New | +$83K |
|
|
ZAYO
667
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $83K | 0.01% |
2,992
+1,038
| +53% | +$28.8K |
|
668
LKQ Corp
LKQ
$8.26B
| $82K | 0.01% |
3,225
+3,154
| +4,442% | +$80.2K |
|
669
Opko Health
OPK
$1.12B
| $82K | 0.01% |
+5,810
| New | +$82K |
|
|
XLRN
670
DELISTED
Acceleron Pharma Inc.
XLRN
| $82K | 0.01% |
2,175
-11,427
| -84% | -$431K |
|
|
NFX
671
DELISTED
Newfield Exploration
NFX
| $82K | 0.01% |
+2,341
| New | +$82K |
|
|
WPP
672
DELISTED
WAUSAU PAPER CORP.
WPP
| $82K | 0.01% |
8,699
+7,058
| +430% | +$66.5K |
|
673
TD Synnex
SNX
$12.5B
| $81K | 0.01% |
+2,112
| New | +$81K |
|
674
Coherent
COHR
$16.1B
| $80K | 0.01% |
4,340
+2,944
| +211% | +$54.3K |
|
675
Gentex
GNTX
$6.15B
| $80K | 0.01% |
+4,386
| New | +$80K |
|