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 | |
|---|---|---|---|---|---|---|
|
XRN
4301
CALL
Chiron Real Estate Inc
XRN
$535M
| $186K | ﹤0.01% |
3,940
| – | – |
|
4302
IonQ
IONQ
$11.9B
| $186K | ﹤0.01% |
54,185
+17,450
| +48% | +$84.2K |
|
|
MTLS
4303
Materialise
MTLS
$366M
| $186K | ﹤0.01% |
21,172
+19,650
| +1,291% | +$194K |
|
4304
PUT
MaxLinear
MXL
$5.19B
| $186K | ﹤0.01% |
5,500
+1,000
| +22% | +$33.9K |
|
4305
NexGen Energy
NXE
$5.91B
| $186K | ﹤0.01% |
42,114
-31,845
| -43% | -$133K |
|
4306
PUT
Playboy Inc
PLBY
$136M
| $186K | ﹤0.01% |
67,700
-14,200
| -17% | -$50.8K |
|
4307
PharmaCyte Biotech
PMCB
$6.29M
| $186K | ﹤0.01% |
63,608
-1,812
| -3% | -$5.19K |
|
4308
Teledyne Technologies
TDY
$29.2B
| $186K | ﹤0.01% |
+466
| New | +$181K |
|
|
ZUO
4309
CALL
DELISTED
Zuora, Inc.
ZUO
| $186K | ﹤0.01% |
29,300
+6,100
| +26% | +$43.1K |
|
|
SQSP
4310
PUT
DELISTED
Squarespace, Inc.
SQSP
| $186K | ﹤0.01% |
8,400
+7,900
| +1,580% | +$166K |
|
|
KYNB
4311
CALL
Kyntra Bio
KYNB
$27.4M
| $185K | ﹤0.01% |
464
+8
| +2% | +$3.06K |
|
4312
CALL
Remitly
RELY
$4.9B
| $185K | ﹤0.01% |
16,200
-92,700
| -85% | -$961K |
|
4313
Scholastic
SCHL
$774M
| $185K | ﹤0.01% |
4,698
+4,400
| +1,477% | +$164K |
|
|
UDMY
4314
CALL
DELISTED
Udemy
UDMY
| $185K | ﹤0.01% |
17,600
+2,500
| +17% | +$33.8K |
|
4315
CALL
USA Compression Partners
USAC
$3.69B
| $185K | ﹤0.01% |
9,500
-20,200
| -68% | -$373K |
|
|
LFG
4316
CALL
DELISTED
Archaea Energy Inc.
LFG
| $185K | ﹤0.01% |
32,400
-13,700
| -30% | -$337K |
|
4317
CALL
The Joint Corp
JYNT
$119M
| $184K | ﹤0.01% |
13,200
+10,000
| +313% | +$154K |
|
4318
Equifax
EFX
$22B
| $183K | ﹤0.01% |
+944
| New | +$173K |
|
|
TBHC
4319
CALL
DELISTED
The Brand House Collective
TBHC
| $183K | ﹤0.01% |
55,600
-42,500
| -43% | -$156K |
|
4320
CALL
Kodak
KODK
$809M
| $183K | ﹤0.01% |
60,000
-74,100
| -55% | -$326K |
|
4321
CALL
Lloyds Banking Group
LYG
$85.2B
| $183K | ﹤0.01% |
83,500
-39,000
| -32% | -$80.2K |
|
4322
PUT
ArcBest
ARCB
$3.15B
| $182K | ﹤0.01% |
2,600
-12,200
| -82% | -$942K |
|
4323
CALL
Clean Harbors
CLH
$17.2B
| $182K | ﹤0.01% |
1,600
-1,900
| -54% | -$222K |
|
4324
CALL
Modine Manufacturing
MOD
$9.46B
| $182K | ﹤0.01% |
9,200
+7,400
| +411% | +$137K |
|
4325
PUT
PROG Holdings
PRG
$1.71B
| $182K | ﹤0.01% |
10,800
+7,700
| +248% | +$132K |
|
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.