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 |
Amazon
AMZN
|
+$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$68.7M |
| 3 |
AT&T
T
|
+$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
+$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
+$94.2M |
| 2 |
Citigroup
C
|
+$62.3M |
| 3 |
JPMorgan Chase
JPM
|
+$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
+$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
526
Nutrien
NTR
$27.9B
| $444K | ﹤0.01% |
6,090
-54,979
| -90% | -$4.01M |
|
|
SAFE
527
DELISTED
Safehold Inc.
SAFE
| $444K | ﹤0.01% |
15,520
+627
| +4% | +$17.9K |
|
528
SSR Mining
SSRM
$4.46B
| $443K | ﹤0.01% |
28,281
-8,907
| -24% | -$140K |
|
529
Carlisle Companies
CSL
$16.2B
| $441K | ﹤0.01% |
1,874
-2,131
| -53% | -$501K |
|
530
SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$41.8B
| $440K | ﹤0.01% |
4,820
-26,300
| -85% | -$2.4M |
|
531
Gerdau
GGB
$6.19B
| $440K | ﹤0.01% |
100,208
+14,828
| +17% | +$65.1K |
|
532
Interactive Brokers
IBKR
$27.8B
| $438K | ﹤0.01% |
24,236
+10,276
| +74% | +$186K |
|
|
VNET
533
VNET Group
VNET
$2.13B
| $436K | ﹤0.01% |
+77,017
| New | +$436K |
|
534
Commercial Metals
CMC
$6.53B
| $435K | ﹤0.01% |
9,020
+2,215
| +33% | +$107K |
|
535
SPDR S&P Insurance ETF
KIE
$815M
| $435K | ﹤0.01% |
+10,644
| New | +$435K |
|
536
Technology Select Sector SPDR Fund
XLK
$86.3B
| $435K | ﹤0.01% |
3,500
| – | – |
|
537
Gartner
IT
$17.6B
| $434K | ﹤0.01% |
1,293
-1,151
| -47% | -$386K |
|
538
Globalstar
GSAT
$3.94B
| $433K | ﹤0.01% |
21,739
+17,235
| +383% | +$343K |
|
539
Alphatec Holdings
ATEC
$2.27B
| $431K | ﹤0.01% |
+34,928
| New | +$431K |
|
540
BorgWarner
BWA
$9.34B
| $428K | ﹤0.01% |
12,080
-1,114
| -8% | -$39.5K |
|
541
Winnebago Industries
WGO
$953M
| $427K | ﹤0.01% |
8,104
-530
| -6% | -$27.9K |
|
542
Credit Acceptance
CACC
$5.8B
| $426K | ﹤0.01% |
+900
| New | +$426K |
|
543
RLX Technology
RLX
$3.22B
| $426K | ﹤0.01% |
185,618
+174,952
| +1,640% | +$402K |
|
|
BCYC
544
Bicycle Therapeutics
BCYC
$485M
| $424K | ﹤0.01% |
14,334
+14,092
| +5,823% | +$417K |
|
545
ProShares Ultra QQQ
QLD
$9.15B
| $423K | ﹤0.01% |
+12,080
| New | +$423K |
|
546
American Axle
AXL
$704M
| $422K | ﹤0.01% |
54,071
-61,415
| -53% | -$479K |
|
547
Pentair
PNR
$17.9B
| $422K | ﹤0.01% |
9,393
+3,735
| +66% | +$168K |
|
548
First Citizens BancShares
FCNCA
$25.2B
| $421K | ﹤0.01% |
+556
| New | +$421K |
|
549
National Grid
NGG
$70.1B
| $421K | ﹤0.01% |
7,304
-16,445
| -69% | -$948K |
|
550
PubMatic
PUBM
$370M
| $420K | ﹤0.01% |
32,843
-25,812
| -44% | -$330K |
|