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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7626
iShares Global Energy ETF
IXC
$2.75B
| $9K | ﹤0.01% |
239
-434
| -64% | -$17K |
|
7627
PUT
Janus International
JBI
$702M
| $9K | ﹤0.01% |
1,000
| – | – |
|
7628
PUT
Kennametal
KMT
$2.56B
| $9K | ﹤0.01% |
400
-19,100
| -98% | -$473K |
|
7629
Monro
MNRO
$414M
| $9K | ﹤0.01% |
208
-829
| -80% | -$38.3K |
|
|
MRIN
7630
DELISTED
Marin Software
MRIN
| $9K | ﹤0.01% |
1,518
-3,547
| -70% | -$24.7K |
|
|
NFGC
7631
PUT
New Found Gold
NFGC
$526M
| $9K | ﹤0.01% |
2,300
+1,600
| +229% | +$6.14K |
|
7632
Nelnet
NNI
$4.96B
| $9K | ﹤0.01% |
+100
| New | +$9.07K |
|
7633
CALL
NatWest
NWG
$69.9B
| $9K | ﹤0.01% |
1,400
+700
| +100% | +$4.1K |
|
7634
PUT
Outfront Media
OUT
$5.75B
| $9K | ﹤0.01% |
610
-6,705
| -92% | -$113K |
|
|
PLYA
7635
CALL
DELISTED
Playa Hotels & Resorts
PLYA
| $9K | ﹤0.01% |
1,400
-139,700
| -99% | -$829K |
|
7636
ProShares Trust UltraShort Lehman 7-10 Year Treasury
PST
$10.6M
| $9K | ﹤0.01% |
+444
| New | +$9.85K |
|
7637
Ring Energy
REI
$307M
| $9K | ﹤0.01% |
4,039
-17,472
| -81% | -$47.9K |
|
7638
PUT
Resideo Technologies
REZI
$5.4B
| $9K | ﹤0.01% |
600
-46,500
| -99% | -$843K |
|
|
RTB
7639
RTB Digital
RTB
$230M
| $9K | ﹤0.01% |
57
-34
| -37% | -$9.56K |
|
7640
PUT
Sonic Automotive
SAH
$3.56B
| $9K | ﹤0.01% |
200
-3,700
| -95% | -$177K |
|
7641
Sabra Healthcare REIT
SBRA
$5.56B
| $9K | ﹤0.01% |
757
-7,810
| -91% | -$99.6K |
|
7642
CALL
Stellus Capital Investment Corp
SCM
$205M
| $9K | ﹤0.01% |
700
-300
| -30% | -$3.96K |
|
7643
PUT
Spok Holdings
SPOK
$229M
| $9K | ﹤0.01% |
+1,200
| New | +$9.75K |
|
|
SPTN
7644
PUT
DELISTED
SpartanNash
SPTN
| $9K | ﹤0.01% |
300
+200
| +200% | +$6.51K |
|
7645
CALL
Stereotaxis
STXS
$133M
| $9K | ﹤0.01% |
+4,600
| New | +$8.99K |
|
7646
Sypris Solutions
SYPR
$42.6M
| $9K | ﹤0.01% |
+4,541
| New | +$9.46K |
|
7647
CALL
Transact Technologies
TACT
$50.5M
| $9K | ﹤0.01% |
+1,500
| New | +$7.74K |
|
7648
Taoping
TAOP
$6.72M
| $9K | ﹤0.01% |
48
| – | – |
|
7649
BlackRock TCP Capital
TCPC
$278M
| $9K | ﹤0.01% |
+748
| New | +$9.33K |
|
7650
PUT
Tecnoglass
TGLS
$1.99B
| $9K | ﹤0.01% |
300
-8,200
| -96% | -$212K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.